/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-fpi/conda.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 23:50:15,041 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 23:50:15,044 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 23:50:15,072 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 23:50:15,072 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 23:50:15,080 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 23:50:15,082 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 23:50:15,086 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 23:50:15,088 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 23:50:15,091 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 23:50:15,093 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 23:50:15,094 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 23:50:15,095 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 23:50:15,097 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 23:50:15,100 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 23:50:15,102 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 23:50:15,103 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 23:50:15,104 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 23:50:15,105 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 23:50:15,113 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 23:50:15,115 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 23:50:15,116 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 23:50:15,117 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 23:50:15,117 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 23:50:15,129 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 23:50:15,129 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 23:50:15,130 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 23:50:15,134 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 23:50:15,134 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 23:50:15,135 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 23:50:15,135 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 23:50:15,136 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 23:50:15,141 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 23:50:15,141 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 23:50:15,142 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 23:50:15,142 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 23:50:15,146 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 23:50:15,146 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 23:50:15,146 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 23:50:15,147 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 23:50:15,148 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 23:50:15,149 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 23:50:15,191 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 23:50:15,191 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 23:50:15,193 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 23:50:15,193 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 23:50:15,194 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 23:50:15,194 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 23:50:15,194 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 23:50:15,195 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 23:50:15,195 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 23:50:15,195 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 23:50:15,196 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 23:50:15,196 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 23:50:15,196 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 23:50:15,197 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 23:50:15,197 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 23:50:15,197 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 23:50:15,197 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 23:50:15,197 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 23:50:15,198 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 23:50:15,198 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 23:50:15,198 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 23:50:15,198 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 23:50:15,199 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 23:50:15,199 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 23:50:15,199 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 23:50:15,199 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 23:50:15,199 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 23:50:15,200 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 23:50:15,200 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 23:50:15,200 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 23:50:15,524 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 23:50:15,534 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 23:50:15,540 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 23:50:15,541 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 23:50:15,542 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 23:50:15,542 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/conda.c [2020-10-13 23:50:15,603 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/74a91e902/cd8084d136ed4c148a9406af363a3e73/FLAG54034fad6 [2020-10-13 23:50:16,058 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 23:50:16,059 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/conda.c [2020-10-13 23:50:16,065 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/74a91e902/cd8084d136ed4c148a9406af363a3e73/FLAG54034fad6 [2020-10-13 23:50:16,497 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/74a91e902/cd8084d136ed4c148a9406af363a3e73 [2020-10-13 23:50:16,508 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 23:50:16,510 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 23:50:16,511 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 23:50:16,512 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 23:50:16,515 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 23:50:16,516 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:50:16" (1/1) ... [2020-10-13 23:50:16,519 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@700715c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:50:16, skipping insertion in model container [2020-10-13 23:50:16,519 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:50:16" (1/1) ... [2020-10-13 23:50:16,527 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 23:50:16,546 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 23:50:16,762 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 23:50:16,774 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 23:50:16,798 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 23:50:16,917 INFO L208 MainTranslator]: Completed translation [2020-10-13 23:50:16,919 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:50:16 WrapperNode [2020-10-13 23:50:16,920 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 23:50:16,920 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 23:50:16,921 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 23:50:16,921 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 23:50:16,937 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:50:16" (1/1) ... [2020-10-13 23:50:16,939 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:50:16" (1/1) ... [2020-10-13 23:50:16,963 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:50:16" (1/1) ... [2020-10-13 23:50:16,963 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:50:16" (1/1) ... [2020-10-13 23:50:16,984 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:50:16" (1/1) ... [2020-10-13 23:50:16,992 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:50:16" (1/1) ... [2020-10-13 23:50:16,998 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:50:16" (1/1) ... [2020-10-13 23:50:17,003 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 23:50:17,004 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 23:50:17,004 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 23:50:17,004 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 23:50:17,005 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:50:16" (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 23:50:17,090 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 23:50:17,090 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 23:50:17,091 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 23:50:17,091 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 23:50:17,091 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 23:50:17,091 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 23:50:17,091 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 23:50:17,093 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 23:50:17,093 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 23:50:17,093 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 23:50:17,093 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-13 23:50:17,093 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 23:50:17,094 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 23:50:17,094 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-13 23:50:17,094 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 23:50:17,095 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 23:50:17,095 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 23:50:17,096 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 23:50:17,096 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 23:50:17,365 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 23:50:17,365 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-13 23:50:17,369 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:50:17 BoogieIcfgContainer [2020-10-13 23:50:17,370 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 23:50:17,371 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 23:50:17,372 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 23:50:17,376 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 23:50:17,378 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 11:50:16" (1/3) ... [2020-10-13 23:50:17,379 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c2e4966 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:50:17, skipping insertion in model container [2020-10-13 23:50:17,380 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:50:16" (2/3) ... [2020-10-13 23:50:17,380 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c2e4966 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:50:17, skipping insertion in model container [2020-10-13 23:50:17,380 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:50:17" (3/3) ... [2020-10-13 23:50:17,386 INFO L109 eAbstractionObserver]: Analyzing ICFG conda.c [2020-10-13 23:50:17,410 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 23:50:17,427 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 23:50:17,440 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 23:50:17,464 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 23:50:17,464 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 23:50:17,464 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 23:50:17,464 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 23:50:17,465 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 23:50:17,465 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 23:50:17,465 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 23:50:17,465 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 23:50:17,484 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-10-13 23:50:17,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-13 23:50:17,491 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:50:17,493 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] [2020-10-13 23:50:17,493 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:50:17,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:50:17,500 INFO L82 PathProgramCache]: Analyzing trace with hash -88121349, now seen corresponding path program 1 times [2020-10-13 23:50:17,509 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:50:17,510 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [164253761] [2020-10-13 23:50:17,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:50:17,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:17,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:17,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:17,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:17,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:18,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:50:18,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-13 23:50:18,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:50:18,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1051 [2020-10-13 23:50:18,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:50:18,699 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:50:18,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:50:18,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-13 23:50:18,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:50:18,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-13 23:50:18,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:50:18,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:18,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:18,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:50:18,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:50:18,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:50:18,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:50:18,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:50:18,790 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:50:18,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:50:18,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:50:18,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:50:18,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:50:18,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:50:18,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:18,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:18,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:50:18,806 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:50:18,806 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:50:18,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 23:50:18,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:50:18,807 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:50:18,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:50:18,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-13 23:50:18,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:50:18,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:50:18,819 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 23:50:18,820 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [164253761] [2020-10-13 23:50:18,824 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:50:18,824 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 23:50:18,825 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636967253] [2020-10-13 23:50:18,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 23:50:18,835 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:50:18,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 23:50:18,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 23:50:18,855 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2020-10-13 23:50:18,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:50:18,972 INFO L93 Difference]: Finished difference Result 60 states and 77 transitions. [2020-10-13 23:50:18,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 23:50:18,974 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-10-13 23:50:18,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:50:18,982 INFO L225 Difference]: With dead ends: 60 [2020-10-13 23:50:18,982 INFO L226 Difference]: Without dead ends: 28 [2020-10-13 23:50:18,986 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 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 23:50:19,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-13 23:50:19,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-13 23:50:19,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-13 23:50:19,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2020-10-13 23:50:19,024 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 23 [2020-10-13 23:50:19,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:50:19,024 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2020-10-13 23:50:19,024 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 23:50:19,025 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2020-10-13 23:50:19,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-13 23:50:19,026 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:50:19,026 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] [2020-10-13 23:50:19,026 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 23:50:19,027 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:50:19,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:50:19,027 INFO L82 PathProgramCache]: Analyzing trace with hash -1099238599, now seen corresponding path program 1 times [2020-10-13 23:50:19,027 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:50:19,028 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [77601859] [2020-10-13 23:50:19,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:50:19,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:19,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:19,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:19,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:19,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:50:19,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-13 23:50:19,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:50:19,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 189 [2020-10-13 23:50:19,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:50:19,233 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:50:19,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 23:50:19,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:50:19,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 23:50:19,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:50:19,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:50:19,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:19,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:19,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:50:19,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:50:19,277 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:50:19,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:50:19,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:50:19,278 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:50:19,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:50:19,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:50:19,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:50:19,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:50:19,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:50:19,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:19,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:19,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:50:19,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:50:19,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:50:19,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 23:50:19,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:50:19,289 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:50:19,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:50:19,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:50:19,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:50:19,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:50:19,292 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 23:50:19,293 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [77601859] [2020-10-13 23:50:19,293 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:50:19,293 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 23:50:19,294 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124501651] [2020-10-13 23:50:19,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 23:50:19,296 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:50:19,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 23:50:19,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 23:50:19,296 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 5 states. [2020-10-13 23:50:19,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:50:19,406 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2020-10-13 23:50:19,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 23:50:19,407 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-10-13 23:50:19,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:50:19,408 INFO L225 Difference]: With dead ends: 44 [2020-10-13 23:50:19,408 INFO L226 Difference]: Without dead ends: 31 [2020-10-13 23:50:19,409 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-13 23:50:19,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-13 23:50:19,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-10-13 23:50:19,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-13 23:50:19,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2020-10-13 23:50:19,417 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 23 [2020-10-13 23:50:19,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:50:19,418 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2020-10-13 23:50:19,418 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 23:50:19,418 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2020-10-13 23:50:19,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-13 23:50:19,419 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:50:19,419 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:50:19,420 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 23:50:19,420 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:50:19,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:50:19,420 INFO L82 PathProgramCache]: Analyzing trace with hash 188437731, now seen corresponding path program 1 times [2020-10-13 23:50:19,420 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:50:19,421 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2139212591] [2020-10-13 23:50:19,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:50:19,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:19,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:19,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:19,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:20,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:21,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:21,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:21,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:21,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:22,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:50:22,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-13 23:50:22,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 23:50:22,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2560 [2020-10-13 23:50:22,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:50:22,004 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:50:22,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 23:50:22,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:50:22,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 23:50:22,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:50:22,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:50:22,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:22,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:22,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:50:22,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:50:22,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:50:22,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:50:22,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:50:22,683 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:50:22,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:50:22,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:50:22,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:50:22,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:50:22,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:50:22,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:22,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:22,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:50:22,690 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:50:22,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:50:22,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:50:22,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:50:22,691 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:50:22,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:50:22,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:50:22,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:50:22,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:50:22,701 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:50:22,702 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2139212591] [2020-10-13 23:50:22,702 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:50:22,702 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 23:50:22,703 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507830652] [2020-10-13 23:50:22,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 23:50:22,703 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:50:22,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 23:50:22,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2020-10-13 23:50:22,705 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand 15 states. [2020-10-13 23:50:23,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:50:23,512 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2020-10-13 23:50:23,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 23:50:23,513 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 30 [2020-10-13 23:50:23,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:50:23,514 INFO L225 Difference]: With dead ends: 48 [2020-10-13 23:50:23,514 INFO L226 Difference]: Without dead ends: 42 [2020-10-13 23:50:23,515 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2020-10-13 23:50:23,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-13 23:50:23,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 37. [2020-10-13 23:50:23,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-13 23:50:23,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2020-10-13 23:50:23,523 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 30 [2020-10-13 23:50:23,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:50:23,524 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2020-10-13 23:50:23,524 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 23:50:23,524 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2020-10-13 23:50:23,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-13 23:50:23,525 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:50:23,525 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:50:23,525 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 23:50:23,526 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:50:23,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:50:23,526 INFO L82 PathProgramCache]: Analyzing trace with hash 446603169, now seen corresponding path program 1 times [2020-10-13 23:50:23,526 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:50:23,527 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [670418478] [2020-10-13 23:50:23,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:50:23,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:23,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:23,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:23,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:23,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:24,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:50:24,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-13 23:50:24,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:50:24,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1024 [2020-10-13 23:50:24,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:50:24,568 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:50:24,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 23:50:24,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-13 23:50:24,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 23:50:24,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:50:24,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:50:24,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:24,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:24,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:50:24,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:50:24,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:50:24,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:50:24,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:50:24,666 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:50:24,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:50:24,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:50:24,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:50:24,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:50:24,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:50:24,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:24,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:24,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:50:24,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:50:24,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:50:24,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:50:24,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:50:24,672 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:50:24,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:50:24,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:50:24,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:50:24,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:50:24,677 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 23:50:24,677 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [670418478] [2020-10-13 23:50:24,677 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:50:24,678 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 23:50:24,678 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92694262] [2020-10-13 23:50:24,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 23:50:24,679 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:50:24,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 23:50:24,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-13 23:50:24,679 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand 9 states. [2020-10-13 23:50:24,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:50:24,978 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2020-10-13 23:50:24,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 23:50:24,979 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 30 [2020-10-13 23:50:24,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:50:24,981 INFO L225 Difference]: With dead ends: 50 [2020-10-13 23:50:24,981 INFO L226 Difference]: Without dead ends: 40 [2020-10-13 23:50:24,982 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-10-13 23:50:24,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-13 23:50:24,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-10-13 23:50:24,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-13 23:50:24,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2020-10-13 23:50:24,992 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 30 [2020-10-13 23:50:24,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:50:24,992 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2020-10-13 23:50:24,993 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 23:50:24,993 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2020-10-13 23:50:24,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-13 23:50:24,995 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:50:24,995 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:50:24,995 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 23:50:24,996 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:50:24,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:50:24,996 INFO L82 PathProgramCache]: Analyzing trace with hash -231251771, now seen corresponding path program 2 times [2020-10-13 23:50:24,997 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:50:24,997 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1000973810] [2020-10-13 23:50:24,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:50:25,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:25,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:25,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:25,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:50:25,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-13 23:50:25,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:50:25,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 779 [2020-10-13 23:50:25,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:50:25,795 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:50:25,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 23:50:25,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:50:25,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-13 23:50:25,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:50:25,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:50:25,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:25,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:25,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:50:25,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:50:25,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:50:25,876 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:50:25,876 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:50:25,876 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:50:25,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:50:25,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:50:25,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:50:25,877 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:50:25,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:50:25,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:25,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:25,885 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:50:25,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:50:25,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:50:25,886 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:50:25,886 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:50:25,886 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:50:25,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:50:25,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:50:25,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:50:25,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:50:25,891 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 23:50:25,891 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1000973810] [2020-10-13 23:50:25,892 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:50:25,892 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 23:50:25,892 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164296161] [2020-10-13 23:50:25,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 23:50:25,893 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:50:25,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 23:50:25,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-13 23:50:25,894 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand 8 states. [2020-10-13 23:50:26,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:50:26,190 INFO L93 Difference]: Finished difference Result 82 states and 96 transitions. [2020-10-13 23:50:26,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 23:50:26,191 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2020-10-13 23:50:26,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:50:26,193 INFO L225 Difference]: With dead ends: 82 [2020-10-13 23:50:26,193 INFO L226 Difference]: Without dead ends: 55 [2020-10-13 23:50:26,194 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-13 23:50:26,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-13 23:50:26,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 39. [2020-10-13 23:50:26,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-13 23:50:26,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2020-10-13 23:50:26,213 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 32 [2020-10-13 23:50:26,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:50:26,214 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2020-10-13 23:50:26,214 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 23:50:26,215 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2020-10-13 23:50:26,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-13 23:50:26,219 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:50:26,219 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-13 23:50:26,220 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 23:50:26,220 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:50:26,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:50:26,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1341613535, now seen corresponding path program 3 times [2020-10-13 23:50:26,221 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:50:26,222 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [597822826] [2020-10-13 23:50:26,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:50:26,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:26,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:26,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:26,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:26,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:26,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:26,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:27,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:27,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:28,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:28,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:29,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:50:29,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-13 23:50:29,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 23:50:29,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3390 [2020-10-13 23:50:29,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:50:29,637 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:50:29,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 23:50:29,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:50:29,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 23:50:29,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:50:29,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:50:29,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:29,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:29,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:50:29,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:50:29,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:50:29,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:50:29,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:50:29,709 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:50:29,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:50:29,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:50:29,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:50:29,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:50:29,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:50:29,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:29,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:29,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:50:29,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:50:29,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:50:29,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:50:29,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:50:29,716 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:50:29,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:50:29,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:50:29,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:50:29,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:50:29,729 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-13 23:50:29,730 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [597822826] [2020-10-13 23:50:29,731 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:50:29,732 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 23:50:29,732 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620355601] [2020-10-13 23:50:29,733 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 23:50:29,733 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:50:29,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 23:50:29,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-13 23:50:29,734 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand 8 states. [2020-10-13 23:50:29,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:50:29,979 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2020-10-13 23:50:29,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 23:50:29,980 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 35 [2020-10-13 23:50:29,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:50:29,981 INFO L225 Difference]: With dead ends: 49 [2020-10-13 23:50:29,981 INFO L226 Difference]: Without dead ends: 43 [2020-10-13 23:50:29,982 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-10-13 23:50:29,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-13 23:50:29,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2020-10-13 23:50:29,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-13 23:50:29,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2020-10-13 23:50:29,989 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 35 [2020-10-13 23:50:29,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:50:29,989 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2020-10-13 23:50:29,989 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 23:50:29,989 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2020-10-13 23:50:29,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-13 23:50:29,990 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:50:29,991 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-13 23:50:29,991 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 23:50:29,991 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:50:29,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:50:29,992 INFO L82 PathProgramCache]: Analyzing trace with hash -130866495, now seen corresponding path program 4 times [2020-10-13 23:50:29,992 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:50:29,992 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1350817941] [2020-10-13 23:50:29,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:50:30,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:30,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:30,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:30,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:30,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:31,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:31,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:31,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:32,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:32,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:32,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:32,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:33,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:33,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:34,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:34,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:34,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:34,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:34,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:35,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:50:35,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-13 23:50:35,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-13 23:50:35,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 23:50:35,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:50:35,014 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:50:35,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 23:50:35,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:50:35,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 23:50:35,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:50:36,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:50:36,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:36,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:36,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:50:36,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:50:36,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:50:36,183 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:50:36,183 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:50:36,183 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:50:36,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:50:36,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:50:36,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:50:36,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:50:36,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:50:36,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:36,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:36,188 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:50:36,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:50:36,189 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:50:36,189 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:50:36,189 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:50:36,189 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:50:36,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:50:36,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:50:36,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:50:36,190 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:50:36,202 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:50:36,203 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1350817941] [2020-10-13 23:50:36,203 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:50:36,203 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 23:50:36,203 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263633481] [2020-10-13 23:50:36,204 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 23:50:36,204 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:50:36,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 23:50:36,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2020-10-13 23:50:36,205 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand 21 states. [2020-10-13 23:50:36,834 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 50 [2020-10-13 23:50:37,088 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-10-13 23:50:37,356 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 45 [2020-10-13 23:50:37,662 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2020-10-13 23:50:38,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:50:38,825 INFO L93 Difference]: Finished difference Result 62 states and 71 transitions. [2020-10-13 23:50:38,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 23:50:38,826 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 37 [2020-10-13 23:50:38,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:50:38,829 INFO L225 Difference]: With dead ends: 62 [2020-10-13 23:50:38,829 INFO L226 Difference]: Without dead ends: 56 [2020-10-13 23:50:38,830 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=215, Invalid=1425, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 23:50:38,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-13 23:50:38,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 47. [2020-10-13 23:50:38,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-13 23:50:38,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2020-10-13 23:50:38,845 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 37 [2020-10-13 23:50:38,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:50:38,846 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2020-10-13 23:50:38,846 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 23:50:38,846 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2020-10-13 23:50:38,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-13 23:50:38,847 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:50:38,848 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-13 23:50:38,848 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 23:50:38,848 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:50:38,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:50:38,848 INFO L82 PathProgramCache]: Analyzing trace with hash -1141983745, now seen corresponding path program 1 times [2020-10-13 23:50:38,849 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:50:38,850 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2057654727] [2020-10-13 23:50:38,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:50:38,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:38,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:38,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:38,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:39,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:39,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:40,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:40,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:41,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:41,933 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:50:41,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-13 23:50:41,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 23:50:41,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3068 [2020-10-13 23:50:41,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:50:41,934 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:50:41,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 23:50:41,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:50:41,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 23:50:41,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:50:42,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:50:42,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:42,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:42,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:50:42,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:50:42,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:50:42,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:50:42,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:50:42,101 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:50:42,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:50:42,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:50:42,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:50:42,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:50:42,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:50:42,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:42,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:42,105 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:50:42,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:50:42,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:50:42,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:50:42,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:50:42,106 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:50:42,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:50:42,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:50:42,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:50:42,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:50:42,110 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 23:50:42,111 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2057654727] [2020-10-13 23:50:42,111 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:50:42,111 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 23:50:42,112 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652236864] [2020-10-13 23:50:42,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 23:50:42,112 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:50:42,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 23:50:42,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2020-10-13 23:50:42,113 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand 13 states. [2020-10-13 23:50:42,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:50:42,550 INFO L93 Difference]: Finished difference Result 65 states and 74 transitions. [2020-10-13 23:50:42,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 23:50:42,551 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 37 [2020-10-13 23:50:42,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:50:42,552 INFO L225 Difference]: With dead ends: 65 [2020-10-13 23:50:42,552 INFO L226 Difference]: Without dead ends: 53 [2020-10-13 23:50:42,555 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=318, Unknown=0, NotChecked=0, Total=420 [2020-10-13 23:50:42,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-13 23:50:42,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 47. [2020-10-13 23:50:42,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-13 23:50:42,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2020-10-13 23:50:42,570 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 37 [2020-10-13 23:50:42,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:50:42,570 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2020-10-13 23:50:42,571 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 23:50:42,571 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2020-10-13 23:50:42,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-13 23:50:42,573 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:50:42,573 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-13 23:50:42,574 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 23:50:42,574 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:50:42,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:50:42,575 INFO L82 PathProgramCache]: Analyzing trace with hash -1719214397, now seen corresponding path program 2 times [2020-10-13 23:50:42,575 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:50:42,582 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [741430209] [2020-10-13 23:50:42,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:50:42,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:42,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:42,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:42,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:42,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:42,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:43,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:44,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:50:44,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-13 23:50:44,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:50:44,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1554 [2020-10-13 23:50:44,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:50:44,155 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:50:44,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 23:50:44,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:50:44,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 23:50:44,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:50:44,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:50:44,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:44,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:44,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:50:44,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:50:44,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:50:44,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:50:44,217 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:50:44,217 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:50:44,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:50:44,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:50:44,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:50:44,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 23:50:44,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:50:44,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:44,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:44,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:50:44,223 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:50:44,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:50:44,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:50:44,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:50:44,224 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:50:44,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:50:44,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:50:44,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:50:44,225 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:50:44,231 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-13 23:50:44,232 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [741430209] [2020-10-13 23:50:44,232 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:50:44,232 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 23:50:44,232 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012415884] [2020-10-13 23:50:44,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 23:50:44,234 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:50:44,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 23:50:44,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-13 23:50:44,234 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand 7 states. [2020-10-13 23:50:44,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:50:44,375 INFO L93 Difference]: Finished difference Result 67 states and 77 transitions. [2020-10-13 23:50:44,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 23:50:44,375 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 37 [2020-10-13 23:50:44,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:50:44,376 INFO L225 Difference]: With dead ends: 67 [2020-10-13 23:50:44,376 INFO L226 Difference]: Without dead ends: 49 [2020-10-13 23:50:44,378 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:50:44,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-13 23:50:44,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2020-10-13 23:50:44,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-13 23:50:44,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2020-10-13 23:50:44,389 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 37 [2020-10-13 23:50:44,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:50:44,389 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2020-10-13 23:50:44,389 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 23:50:44,389 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2020-10-13 23:50:44,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-13 23:50:44,391 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:50:44,391 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2020-10-13 23:50:44,391 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 23:50:44,391 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:50:44,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:50:44,392 INFO L82 PathProgramCache]: Analyzing trace with hash -2139934941, now seen corresponding path program 5 times [2020-10-13 23:50:44,392 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:50:44,392 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [339322524] [2020-10-13 23:50:44,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:50:44,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:44,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:44,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:45,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:50:45,384 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-13 23:50:45,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:50:45,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 980 [2020-10-13 23:50:45,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:50:45,385 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:50:45,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 23:50:45,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:50:45,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 23:50:45,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:50:45,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:50:45,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:45,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:45,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:50:45,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:50:45,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:50:45,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:50:45,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:50:45,456 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:50:45,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:50:45,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:50:45,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:50:45,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:50:45,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:50:45,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:45,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:45,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:50:45,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:50:45,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:50:45,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:50:45,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:50:45,461 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:50:45,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:50:45,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:50:45,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:50:45,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:50:45,464 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-13 23:50:45,465 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [339322524] [2020-10-13 23:50:45,465 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:50:45,465 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 23:50:45,465 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095305353] [2020-10-13 23:50:45,466 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 23:50:45,466 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:50:45,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 23:50:45,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:50:45,467 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand 10 states. [2020-10-13 23:50:45,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:50:45,668 INFO L93 Difference]: Finished difference Result 96 states and 110 transitions. [2020-10-13 23:50:45,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 23:50:45,668 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2020-10-13 23:50:45,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:50:45,670 INFO L225 Difference]: With dead ends: 96 [2020-10-13 23:50:45,670 INFO L226 Difference]: Without dead ends: 62 [2020-10-13 23:50:45,671 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-10-13 23:50:45,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-13 23:50:45,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 46. [2020-10-13 23:50:45,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-13 23:50:45,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2020-10-13 23:50:45,683 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 39 [2020-10-13 23:50:45,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:50:45,683 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2020-10-13 23:50:45,683 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 23:50:45,683 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2020-10-13 23:50:45,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-13 23:50:45,686 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:50:45,686 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-13 23:50:45,688 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 23:50:45,688 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:50:45,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:50:45,689 INFO L82 PathProgramCache]: Analyzing trace with hash 890720641, now seen corresponding path program 6 times [2020-10-13 23:50:45,689 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:50:45,689 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [138339753] [2020-10-13 23:50:45,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:50:45,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:45,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:45,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:45,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:45,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:46,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:46,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:46,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:46,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:46,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:46,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:46,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:46,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:46,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:46,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:47,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:47,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:48,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:48,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:49,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:50,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:50,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:50:50,707 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-13 23:50:50,707 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 20 [2020-10-13 23:50:50,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 23:50:50,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:50:50,708 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:50:50,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 23:50:50,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:50:50,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-13 23:50:50,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:50:50,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:50:50,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:50,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:50,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:50:50,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:50:50,804 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:50:50,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:50:50,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:50:50,806 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:50:50,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:50:50,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:50:50,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:50:50,807 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:50:50,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:50:50,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:50,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:50,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:50:50,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:50:50,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:50:50,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:50:50,813 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:50:50,813 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:50:50,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:50:50,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:50:50,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:50:50,814 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:50:50,820 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-13 23:50:50,821 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [138339753] [2020-10-13 23:50:50,821 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:50:50,821 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 23:50:50,821 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317612145] [2020-10-13 23:50:50,822 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 23:50:50,822 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:50:50,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 23:50:50,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:50:50,823 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand 10 states. [2020-10-13 23:50:51,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:50:51,125 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2020-10-13 23:50:51,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 23:50:51,126 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 42 [2020-10-13 23:50:51,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:50:51,127 INFO L225 Difference]: With dead ends: 56 [2020-10-13 23:50:51,127 INFO L226 Difference]: Without dead ends: 50 [2020-10-13 23:50:51,128 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:50:51,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-13 23:50:51,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2020-10-13 23:50:51,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-13 23:50:51,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2020-10-13 23:50:51,136 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 42 [2020-10-13 23:50:51,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:50:51,136 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2020-10-13 23:50:51,136 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 23:50:51,136 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2020-10-13 23:50:51,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-13 23:50:51,137 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:50:51,137 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-13 23:50:51,137 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 23:50:51,138 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:50:51,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:50:51,138 INFO L82 PathProgramCache]: Analyzing trace with hash 352759267, now seen corresponding path program 7 times [2020-10-13 23:50:51,139 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:50:51,139 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [851885672] [2020-10-13 23:50:51,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:50:51,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:51,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:51,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:52,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:52,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:53,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:53,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:54,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:54,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:55,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:55,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:55,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:55,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:56,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:50:56,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-13 23:50:56,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 23:50:56,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 23:50:56,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:50:56,159 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:50:56,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 23:50:56,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:50:56,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-13 23:50:56,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:50:56,974 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2020-10-13 23:50:58,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:50:58,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:58,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:58,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:50:58,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:50:58,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:50:58,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:50:58,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:50:58,196 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:50:58,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:50:58,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:50:58,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:50:58,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:50:58,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:50:58,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:50:58,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:50:58,201 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:50:58,201 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:50:58,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:50:58,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:50:58,202 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:50:58,202 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:50:58,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:50:58,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:50:58,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:50:58,203 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:50:58,229 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:50:58,230 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [851885672] [2020-10-13 23:50:58,230 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:50:58,230 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 23:50:58,230 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081049542] [2020-10-13 23:50:58,231 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 23:50:58,232 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:50:58,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 23:50:58,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=643, Unknown=0, NotChecked=0, Total=702 [2020-10-13 23:50:58,233 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand 27 states. [2020-10-13 23:50:59,755 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 56 [2020-10-13 23:51:00,485 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 77 [2020-10-13 23:51:00,781 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2020-10-13 23:51:01,476 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2020-10-13 23:51:01,749 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 58 [2020-10-13 23:51:01,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:51:01,906 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2020-10-13 23:51:01,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-13 23:51:01,907 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 44 [2020-10-13 23:51:01,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:51:01,908 INFO L225 Difference]: With dead ends: 66 [2020-10-13 23:51:01,909 INFO L226 Difference]: Without dead ends: 60 [2020-10-13 23:51:01,910 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=209, Invalid=2241, Unknown=0, NotChecked=0, Total=2450 [2020-10-13 23:51:01,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-13 23:51:01,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2020-10-13 23:51:01,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-13 23:51:01,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2020-10-13 23:51:01,923 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 44 [2020-10-13 23:51:01,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:51:01,923 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2020-10-13 23:51:01,923 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 23:51:01,924 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2020-10-13 23:51:01,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-13 23:51:01,924 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:51:01,924 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2020-10-13 23:51:01,924 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 23:51:01,924 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:51:01,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:51:01,925 INFO L82 PathProgramCache]: Analyzing trace with hash -668309087, now seen corresponding path program 3 times [2020-10-13 23:51:01,925 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:51:01,925 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1094591712] [2020-10-13 23:51:01,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:51:01,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:51:01,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:01,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:02,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:02,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:02,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:02,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:03,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:03,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:03,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:05,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:05,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:05,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:06,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:06,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:51:06,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-13 23:51:06,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-13 23:51:06,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 23:51:06,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:51:06,939 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:51:06,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 23:51:06,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-13 23:51:06,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 23:51:06,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:51:07,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:51:07,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:51:07,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:07,214 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:51:07,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:51:07,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:51:07,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:51:07,215 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:51:07,215 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:51:07,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:51:07,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:51:07,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:51:07,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:51:07,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:51:07,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:51:07,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:07,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:51:07,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:51:07,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:51:07,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:51:07,220 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:51:07,220 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:51:07,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:51:07,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:51:07,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:51:07,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:51:07,235 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 23:51:07,236 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1094591712] [2020-10-13 23:51:07,237 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:51:07,237 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 23:51:07,237 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480388807] [2020-10-13 23:51:07,238 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 23:51:07,238 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:51:07,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 23:51:07,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-10-13 23:51:07,239 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand 15 states. [2020-10-13 23:51:08,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:51:08,026 INFO L93 Difference]: Finished difference Result 82 states and 92 transitions. [2020-10-13 23:51:08,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 23:51:08,026 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 44 [2020-10-13 23:51:08,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:51:08,028 INFO L225 Difference]: With dead ends: 82 [2020-10-13 23:51:08,028 INFO L226 Difference]: Without dead ends: 76 [2020-10-13 23:51:08,029 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=157, Invalid=655, Unknown=0, NotChecked=0, Total=812 [2020-10-13 23:51:08,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-13 23:51:08,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 60. [2020-10-13 23:51:08,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-13 23:51:08,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 70 transitions. [2020-10-13 23:51:08,044 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 70 transitions. Word has length 44 [2020-10-13 23:51:08,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:51:08,044 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 70 transitions. [2020-10-13 23:51:08,044 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 23:51:08,045 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 70 transitions. [2020-10-13 23:51:08,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-13 23:51:08,045 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:51:08,045 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2020-10-13 23:51:08,045 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 23:51:08,046 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:51:08,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:51:08,046 INFO L82 PathProgramCache]: Analyzing trace with hash -1336184475, now seen corresponding path program 4 times [2020-10-13 23:51:08,046 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:51:08,046 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1211167832] [2020-10-13 23:51:08,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:51:08,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:51:08,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:08,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:08,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:08,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:08,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:08,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:08,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:08,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:09,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:10,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:11,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:11,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:11,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:12,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:13,058 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:51:13,058 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-13 23:51:13,058 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-13 23:51:13,058 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 23:51:13,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:51:13,059 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:51:13,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 23:51:13,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-13 23:51:13,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 23:51:13,059 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:51:13,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:51:13,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:51:13,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:13,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:51:13,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:51:13,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:51:13,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:51:13,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:51:13,399 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:51:13,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:51:13,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:51:13,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:51:13,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:51:13,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:51:13,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:51:13,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:13,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:51:13,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:51:13,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:51:13,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:51:13,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:51:13,403 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:51:13,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:51:13,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:51:13,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:51:13,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:51:13,408 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-13 23:51:13,408 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1211167832] [2020-10-13 23:51:13,408 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:51:13,408 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 23:51:13,408 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967626032] [2020-10-13 23:51:13,409 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 23:51:13,409 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:51:13,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 23:51:13,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:51:13,410 INFO L87 Difference]: Start difference. First operand 60 states and 70 transitions. Second operand 14 states. [2020-10-13 23:51:14,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:51:14,321 INFO L93 Difference]: Finished difference Result 84 states and 98 transitions. [2020-10-13 23:51:14,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 23:51:14,321 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 44 [2020-10-13 23:51:14,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:51:14,323 INFO L225 Difference]: With dead ends: 84 [2020-10-13 23:51:14,323 INFO L226 Difference]: Without dead ends: 67 [2020-10-13 23:51:14,324 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=169, Invalid=587, Unknown=0, NotChecked=0, Total=756 [2020-10-13 23:51:14,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-13 23:51:14,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2020-10-13 23:51:14,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-13 23:51:14,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 74 transitions. [2020-10-13 23:51:14,335 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 74 transitions. Word has length 44 [2020-10-13 23:51:14,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:51:14,335 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 74 transitions. [2020-10-13 23:51:14,335 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 23:51:14,335 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 74 transitions. [2020-10-13 23:51:14,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-13 23:51:14,336 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:51:14,336 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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] [2020-10-13 23:51:14,336 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 23:51:14,337 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:51:14,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:51:14,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1232045627, now seen corresponding path program 8 times [2020-10-13 23:51:14,337 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:51:14,337 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1725465664] [2020-10-13 23:51:14,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:51:14,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:51:14,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:14,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:15,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:51:15,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-13 23:51:15,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:51:15,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1274 [2020-10-13 23:51:15,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:51:15,623 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:51:15,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 23:51:15,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:51:15,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-13 23:51:15,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:51:15,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:51:15,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:51:15,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:15,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:51:15,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:51:15,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:51:15,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:51:15,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:51:15,722 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:51:15,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:51:15,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:51:15,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:51:15,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:51:15,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:51:15,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:51:15,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:15,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:51:15,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:51:15,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:51:15,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:51:15,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:51:15,726 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:51:15,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:51:15,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:51:15,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:51:15,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:51:15,729 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-13 23:51:15,729 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1725465664] [2020-10-13 23:51:15,730 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:51:15,730 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 23:51:15,730 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400903108] [2020-10-13 23:51:15,730 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 23:51:15,730 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:51:15,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 23:51:15,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:51:15,731 INFO L87 Difference]: Start difference. First operand 64 states and 74 transitions. Second operand 12 states. [2020-10-13 23:51:16,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:51:16,059 INFO L93 Difference]: Finished difference Result 142 states and 164 transitions. [2020-10-13 23:51:16,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 23:51:16,059 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 46 [2020-10-13 23:51:16,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:51:16,060 INFO L225 Difference]: With dead ends: 142 [2020-10-13 23:51:16,060 INFO L226 Difference]: Without dead ends: 88 [2020-10-13 23:51:16,063 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-13 23:51:16,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-13 23:51:16,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 61. [2020-10-13 23:51:16,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-13 23:51:16,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 69 transitions. [2020-10-13 23:51:16,082 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 69 transitions. Word has length 46 [2020-10-13 23:51:16,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:51:16,082 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 69 transitions. [2020-10-13 23:51:16,082 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 23:51:16,082 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 69 transitions. [2020-10-13 23:51:16,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-13 23:51:16,085 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:51:16,085 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-13 23:51:16,085 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 23:51:16,086 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:51:16,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:51:16,086 INFO L82 PathProgramCache]: Analyzing trace with hash -1566508697, now seen corresponding path program 9 times [2020-10-13 23:51:16,086 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:51:16,086 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1341883435] [2020-10-13 23:51:16,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:51:16,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:51:16,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:16,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:16,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:16,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:16,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:16,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:16,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:16,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:16,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:16,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:17,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:17,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:17,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:17,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:17,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:17,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:17,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:17,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:17,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:17,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:17,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:18,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:18,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:18,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:18,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:18,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:18,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:18,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:18,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:19,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:19,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:19,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:19,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:19,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:19,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:19,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:20,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:20,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:20,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:20,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:21,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:21,102 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:51:21,102 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-13 23:51:21,102 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 41 [2020-10-13 23:51:21,102 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 23:51:21,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:51:21,103 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:51:21,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 23:51:21,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:51:21,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 23:51:21,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:51:21,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:51:21,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:51:21,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:21,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:51:21,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:51:21,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:51:21,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:51:21,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:51:21,188 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:51:21,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:51:21,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:51:21,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:51:21,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:51:21,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:51:21,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:51:21,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:21,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:51:21,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:51:21,192 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:51:21,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:51:21,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:51:21,192 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:51:21,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:51:21,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:51:21,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:51:21,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:51:21,197 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-13 23:51:21,197 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1341883435] [2020-10-13 23:51:21,198 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:51:21,198 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 23:51:21,198 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35305854] [2020-10-13 23:51:21,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 23:51:21,199 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:51:21,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 23:51:21,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:51:21,199 INFO L87 Difference]: Start difference. First operand 61 states and 69 transitions. Second operand 12 states. [2020-10-13 23:51:21,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:51:21,540 INFO L93 Difference]: Finished difference Result 76 states and 84 transitions. [2020-10-13 23:51:21,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 23:51:21,541 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 49 [2020-10-13 23:51:21,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:51:21,541 INFO L225 Difference]: With dead ends: 76 [2020-10-13 23:51:21,542 INFO L226 Difference]: Without dead ends: 70 [2020-10-13 23:51:21,542 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2020-10-13 23:51:21,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-13 23:51:21,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 52. [2020-10-13 23:51:21,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-13 23:51:21,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 57 transitions. [2020-10-13 23:51:21,554 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 57 transitions. Word has length 49 [2020-10-13 23:51:21,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:51:21,555 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 57 transitions. [2020-10-13 23:51:21,555 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 23:51:21,555 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 57 transitions. [2020-10-13 23:51:21,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-13 23:51:21,555 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:51:21,556 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:51:21,556 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 23:51:21,556 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:51:21,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:51:21,556 INFO L82 PathProgramCache]: Analyzing trace with hash 1187378249, now seen corresponding path program 10 times [2020-10-13 23:51:21,557 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:51:21,557 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1729668291] [2020-10-13 23:51:21,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:51:21,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:51:21,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:22,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:22,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:22,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:23,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:24,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:25,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:25,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:25,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:26,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:26,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:26,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:51:26,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-13 23:51:26,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 23:51:26,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 23:51:26,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:51:26,576 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:51:26,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-13 23:51:26,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:51:26,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 23:51:26,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:51:27,970 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2020-10-13 23:51:29,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:51:29,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:51:29,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:29,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:51:29,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:51:29,139 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:51:29,139 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:51:29,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:51:29,139 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:51:29,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:51:29,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:51:29,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:51:29,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:51:29,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:51:29,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:51:29,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:29,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:51:29,142 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:51:29,142 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:51:29,142 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:51:29,142 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:51:29,143 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:51:29,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:51:29,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:51:29,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:51:29,143 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:51:29,163 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:51:29,163 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1729668291] [2020-10-13 23:51:29,163 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:51:29,163 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-13 23:51:29,163 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678678791] [2020-10-13 23:51:29,164 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-13 23:51:29,164 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:51:29,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-13 23:51:29,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1060, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 23:51:29,165 INFO L87 Difference]: Start difference. First operand 52 states and 57 transitions. Second operand 35 states. [2020-10-13 23:51:30,371 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 65 [2020-10-13 23:51:31,021 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 70 [2020-10-13 23:51:31,669 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 61 [2020-10-13 23:51:31,965 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 69 [2020-10-13 23:51:32,206 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 58 [2020-10-13 23:51:32,467 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 61 [2020-10-13 23:51:33,024 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 73 [2020-10-13 23:51:33,630 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2020-10-13 23:51:34,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:51:34,617 INFO L93 Difference]: Finished difference Result 97 states and 110 transitions. [2020-10-13 23:51:34,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-13 23:51:34,618 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 51 [2020-10-13 23:51:34,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:51:34,619 INFO L225 Difference]: With dead ends: 97 [2020-10-13 23:51:34,620 INFO L226 Difference]: Without dead ends: 91 [2020-10-13 23:51:34,622 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 768 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=399, Invalid=3141, Unknown=0, NotChecked=0, Total=3540 [2020-10-13 23:51:34,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-13 23:51:34,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 71. [2020-10-13 23:51:34,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-13 23:51:34,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 81 transitions. [2020-10-13 23:51:34,638 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 81 transitions. Word has length 51 [2020-10-13 23:51:34,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:51:34,638 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 81 transitions. [2020-10-13 23:51:34,638 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-13 23:51:34,638 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 81 transitions. [2020-10-13 23:51:34,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-13 23:51:34,639 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:51:34,639 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 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] [2020-10-13 23:51:34,640 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 23:51:34,640 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:51:34,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:51:34,640 INFO L82 PathProgramCache]: Analyzing trace with hash 1053364743, now seen corresponding path program 5 times [2020-10-13 23:51:34,640 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:51:34,641 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1043180854] [2020-10-13 23:51:34,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:51:34,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:51:34,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:34,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:34,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:34,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:35,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:35,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:35,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:36,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:36,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:36,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:37,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:37,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:37,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:37,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:37,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:38,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:38,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:38,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:39,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:51:39,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-13 23:51:39,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-13 23:51:39,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 23:51:39,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:51:39,655 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:51:39,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 23:51:39,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:51:39,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 23:51:39,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:51:39,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:51:39,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:51:39,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:39,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:51:39,749 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:51:39,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:51:39,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:51:39,750 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:51:39,750 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:51:39,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:51:39,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:51:39,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:51:39,751 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:51:39,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:51:39,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:51:39,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:39,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:51:39,756 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:51:39,756 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:51:39,756 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:51:39,756 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:51:39,756 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:51:39,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:51:39,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:51:39,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:51:39,757 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:51:39,763 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-10-13 23:51:39,763 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1043180854] [2020-10-13 23:51:39,764 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:51:39,764 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 23:51:39,764 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981268635] [2020-10-13 23:51:39,766 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 23:51:39,767 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:51:39,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 23:51:39,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-13 23:51:39,769 INFO L87 Difference]: Start difference. First operand 71 states and 81 transitions. Second operand 9 states. [2020-10-13 23:51:40,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:51:40,078 INFO L93 Difference]: Finished difference Result 100 states and 113 transitions. [2020-10-13 23:51:40,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 23:51:40,079 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 51 [2020-10-13 23:51:40,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:51:40,080 INFO L225 Difference]: With dead ends: 100 [2020-10-13 23:51:40,080 INFO L226 Difference]: Without dead ends: 76 [2020-10-13 23:51:40,082 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:51:40,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-13 23:51:40,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 71. [2020-10-13 23:51:40,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-13 23:51:40,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 79 transitions. [2020-10-13 23:51:40,094 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 79 transitions. Word has length 51 [2020-10-13 23:51:40,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:51:40,094 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 79 transitions. [2020-10-13 23:51:40,094 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 23:51:40,095 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 79 transitions. [2020-10-13 23:51:40,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-13 23:51:40,095 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:51:40,095 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:51:40,096 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 23:51:40,096 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:51:40,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:51:40,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1972879019, now seen corresponding path program 11 times [2020-10-13 23:51:40,096 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:51:40,097 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [242135185] [2020-10-13 23:51:40,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:51:40,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:51:40,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:40,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:41,988 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:51:41,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-13 23:51:41,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:51:41,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1881 [2020-10-13 23:51:41,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:51:41,989 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:51:41,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 23:51:41,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:51:41,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 23:51:41,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:51:42,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:51:42,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:51:42,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:42,127 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:51:42,128 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:51:42,128 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:51:42,128 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:51:42,129 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:51:42,129 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:51:42,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:51:42,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:51:42,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:51:42,130 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:51:42,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:51:42,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:51:42,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:42,134 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:51:42,135 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:51:42,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:51:42,135 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:51:42,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:51:42,136 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:51:42,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:51:42,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:51:42,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:51:42,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:51:42,143 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-13 23:51:42,143 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [242135185] [2020-10-13 23:51:42,143 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:51:42,143 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 23:51:42,145 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497556633] [2020-10-13 23:51:42,148 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 23:51:42,155 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:51:42,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 23:51:42,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:51:42,156 INFO L87 Difference]: Start difference. First operand 71 states and 79 transitions. Second operand 14 states. [2020-10-13 23:51:42,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:51:42,646 INFO L93 Difference]: Finished difference Result 149 states and 168 transitions. [2020-10-13 23:51:42,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 23:51:42,646 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 53 [2020-10-13 23:51:42,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:51:42,648 INFO L225 Difference]: With dead ends: 149 [2020-10-13 23:51:42,648 INFO L226 Difference]: Without dead ends: 94 [2020-10-13 23:51:42,649 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-13 23:51:42,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-13 23:51:42,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 72. [2020-10-13 23:51:42,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-13 23:51:42,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 79 transitions. [2020-10-13 23:51:42,664 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 79 transitions. Word has length 53 [2020-10-13 23:51:42,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:51:42,665 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 79 transitions. [2020-10-13 23:51:42,665 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 23:51:42,665 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 79 transitions. [2020-10-13 23:51:42,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-13 23:51:42,671 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:51:42,671 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:51:42,671 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 23:51:42,672 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:51:42,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:51:42,672 INFO L82 PathProgramCache]: Analyzing trace with hash 98557899, now seen corresponding path program 12 times [2020-10-13 23:51:42,672 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:51:42,672 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1217807657] [2020-10-13 23:51:42,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:51:42,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:51:42,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:42,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:43,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:44,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:44,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:45,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:45,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:46,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:46,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:47,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:51:47,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-13 23:51:47,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 23:51:47,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 23:51:47,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:51:47,704 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:51:47,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 23:51:47,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:51:47,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 23:51:47,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:51:47,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:51:47,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:51:47,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:47,840 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:51:47,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:51:47,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:51:47,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 23:51:47,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:51:47,841 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:51:47,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:51:47,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:51:47,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:51:47,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:51:47,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:51:47,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:51:47,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:47,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:51:47,848 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:51:47,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:51:47,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:51:47,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:51:47,849 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:51:47,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:51:47,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:51:47,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:51:47,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:51:47,862 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-13 23:51:47,862 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1217807657] [2020-10-13 23:51:47,863 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:51:47,863 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 23:51:47,863 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783222824] [2020-10-13 23:51:47,866 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 23:51:47,866 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:51:47,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 23:51:47,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:51:47,869 INFO L87 Difference]: Start difference. First operand 72 states and 79 transitions. Second operand 14 states. [2020-10-13 23:51:48,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:51:48,446 INFO L93 Difference]: Finished difference Result 87 states and 95 transitions. [2020-10-13 23:51:48,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 23:51:48,448 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 53 [2020-10-13 23:51:48,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:51:48,449 INFO L225 Difference]: With dead ends: 87 [2020-10-13 23:51:48,449 INFO L226 Difference]: Without dead ends: 71 [2020-10-13 23:51:48,450 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2020-10-13 23:51:48,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-13 23:51:48,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 59. [2020-10-13 23:51:48,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-13 23:51:48,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 64 transitions. [2020-10-13 23:51:48,468 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 64 transitions. Word has length 53 [2020-10-13 23:51:48,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:51:48,468 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 64 transitions. [2020-10-13 23:51:48,469 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 23:51:48,469 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 64 transitions. [2020-10-13 23:51:48,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-13 23:51:48,470 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:51:48,471 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:51:48,471 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 23:51:48,471 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:51:48,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:51:48,472 INFO L82 PathProgramCache]: Analyzing trace with hash -1189396253, now seen corresponding path program 13 times [2020-10-13 23:51:48,472 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:51:48,472 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [221918392] [2020-10-13 23:51:48,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:51:48,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:51:48,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:49,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:50,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:51,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:52,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:53,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:51:53,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:51:53,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-13 23:51:53,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:51:53,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 23:51:53,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:51:53,496 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:51:53,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-13 23:51:53,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:51:53,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-13 23:51:53,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:51:54,208 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 42 [2020-10-13 23:51:54,347 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 42 [2020-10-13 23:51:54,549 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 47 [2020-10-13 23:51:54,762 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 55 [2020-10-13 23:51:54,982 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 53 [2020-10-13 23:51:55,132 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 47 [2020-10-13 23:51:55,361 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 53 [2020-10-13 23:51:55,596 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 52 [2020-10-13 23:51:55,856 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 54 [2020-10-13 23:51:56,094 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 54 [2020-10-13 23:51:56,426 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 60 [2020-10-13 23:51:56,668 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 48 [2020-10-13 23:51:56,891 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 52 [2020-10-13 23:51:57,178 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 56 [2020-10-13 23:51:57,426 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 58 [2020-10-13 23:51:57,655 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 58 [2020-10-13 23:51:57,892 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 54 [2020-10-13 23:51:58,083 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 47 [2020-10-13 23:51:58,304 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 56 [2020-10-13 23:51:58,503 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 50 [2020-10-13 23:51:59,061 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 47 [2020-10-13 23:51:59,270 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 41 [2020-10-13 23:51:59,852 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 33 [2020-10-13 23:52:00,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:52:00,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:52:00,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:00,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:52:00,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:52:00,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:52:00,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:52:00,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:52:00,428 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:52:00,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:52:00,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:52:00,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:52:00,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:52:00,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:52:00,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:52:00,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:00,431 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:52:00,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:52:00,431 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:52:00,431 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:52:00,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:52:00,432 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:52:00,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:52:00,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:52:00,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:52:00,432 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:52:00,466 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 1 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:52:00,466 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [221918392] [2020-10-13 23:52:00,467 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:52:00,467 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-13 23:52:00,467 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063673573] [2020-10-13 23:52:00,467 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-13 23:52:00,467 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:52:00,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-13 23:52:00,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1530, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 23:52:00,468 INFO L87 Difference]: Start difference. First operand 59 states and 64 transitions. Second operand 41 states. [2020-10-13 23:52:01,288 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 63 [2020-10-13 23:52:01,618 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 59 [2020-10-13 23:52:02,041 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 68 [2020-10-13 23:52:02,379 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 62 [2020-10-13 23:52:02,701 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 62 [2020-10-13 23:52:02,943 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 53 [2020-10-13 23:52:03,255 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 68 [2020-10-13 23:52:03,792 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 77 [2020-10-13 23:52:04,019 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 49 [2020-10-13 23:52:04,298 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 51 [2020-10-13 23:52:04,601 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 57 [2020-10-13 23:52:05,101 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 89 [2020-10-13 23:52:05,548 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 86 [2020-10-13 23:52:05,988 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 83 [2020-10-13 23:52:06,288 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 58 [2020-10-13 23:52:06,575 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 56 [2020-10-13 23:52:06,852 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 53 [2020-10-13 23:52:07,156 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 56 [2020-10-13 23:52:07,439 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 57 [2020-10-13 23:52:07,903 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 55 [2020-10-13 23:52:08,926 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 82 [2020-10-13 23:52:09,135 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2020-10-13 23:52:09,389 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 49 [2020-10-13 23:52:09,666 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 53 [2020-10-13 23:52:09,926 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 52 [2020-10-13 23:52:10,178 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 51 [2020-10-13 23:52:10,422 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 49 [2020-10-13 23:52:10,670 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 45 [2020-10-13 23:52:11,006 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-10-13 23:52:11,298 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 62 [2020-10-13 23:52:11,681 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2020-10-13 23:52:11,975 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2020-10-13 23:52:12,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:52:12,261 INFO L93 Difference]: Finished difference Result 97 states and 108 transitions. [2020-10-13 23:52:12,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-13 23:52:12,262 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 58 [2020-10-13 23:52:12,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:52:12,263 INFO L225 Difference]: With dead ends: 97 [2020-10-13 23:52:12,263 INFO L226 Difference]: Without dead ends: 91 [2020-10-13 23:52:12,266 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1171 ImplicationChecksByTransitivity, 16.2s TimeCoverageRelationStatistics Valid=566, Invalid=5596, Unknown=0, NotChecked=0, Total=6162 [2020-10-13 23:52:12,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-13 23:52:12,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 70. [2020-10-13 23:52:12,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-13 23:52:12,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 78 transitions. [2020-10-13 23:52:12,276 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 78 transitions. Word has length 58 [2020-10-13 23:52:12,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:52:12,276 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 78 transitions. [2020-10-13 23:52:12,276 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-13 23:52:12,276 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 78 transitions. [2020-10-13 23:52:12,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-13 23:52:12,277 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:52:12,277 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 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] [2020-10-13 23:52:12,277 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 23:52:12,277 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:52:12,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:52:12,277 INFO L82 PathProgramCache]: Analyzing trace with hash -1127356639, now seen corresponding path program 6 times [2020-10-13 23:52:12,277 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:52:12,278 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1073086209] [2020-10-13 23:52:12,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:52:12,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:52:12,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:12,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:12,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:13,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:13,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:13,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:13,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:13,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:13,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:14,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:14,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:14,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:15,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:16,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:16,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:16,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:16,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:16,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:17,295 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:52:17,295 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-13 23:52:17,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-13 23:52:17,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 23:52:17,296 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:52:17,296 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:52:17,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 23:52:17,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-13 23:52:17,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 23:52:17,297 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:52:17,734 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 34 [2020-10-13 23:52:18,084 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 47 [2020-10-13 23:52:18,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:52:18,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:52:18,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:18,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:52:18,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:52:18,517 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:52:18,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:52:18,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:52:18,518 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:52:18,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:52:18,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:52:18,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:52:18,518 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:52:18,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:52:18,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:52:18,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:18,521 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:52:18,521 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:52:18,521 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:52:18,521 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:52:18,522 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:52:18,522 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:52:18,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:52:18,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:52:18,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:52:18,522 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:52:18,532 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 17 proven. 39 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-10-13 23:52:18,532 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1073086209] [2020-10-13 23:52:18,532 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:52:18,532 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 23:52:18,532 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105716154] [2020-10-13 23:52:18,533 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 23:52:18,533 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:52:18,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 23:52:18,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:52:18,533 INFO L87 Difference]: Start difference. First operand 70 states and 78 transitions. Second operand 18 states. [2020-10-13 23:52:18,967 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 35 [2020-10-13 23:52:19,121 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 37 [2020-10-13 23:52:19,458 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 58 [2020-10-13 23:52:20,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:52:20,017 INFO L93 Difference]: Finished difference Result 103 states and 115 transitions. [2020-10-13 23:52:20,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 23:52:20,019 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 58 [2020-10-13 23:52:20,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:52:20,021 INFO L225 Difference]: With dead ends: 103 [2020-10-13 23:52:20,021 INFO L226 Difference]: Without dead ends: 85 [2020-10-13 23:52:20,022 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=152, Invalid=718, Unknown=0, NotChecked=0, Total=870 [2020-10-13 23:52:20,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-13 23:52:20,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 73. [2020-10-13 23:52:20,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-13 23:52:20,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 82 transitions. [2020-10-13 23:52:20,032 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 82 transitions. Word has length 58 [2020-10-13 23:52:20,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:52:20,032 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 82 transitions. [2020-10-13 23:52:20,032 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 23:52:20,032 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 82 transitions. [2020-10-13 23:52:20,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-13 23:52:20,032 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:52:20,033 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:52:20,033 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 23:52:20,033 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:52:20,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:52:20,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1479783227, now seen corresponding path program 14 times [2020-10-13 23:52:20,033 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:52:20,033 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2109296505] [2020-10-13 23:52:20,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:52:20,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:52:20,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:20,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:23,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:52:23,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-13 23:52:23,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:52:23,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2975 [2020-10-13 23:52:23,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:52:23,021 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:52:23,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 23:52:23,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:52:23,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-13 23:52:23,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:52:23,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:52:23,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:52:23,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:23,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:52:23,176 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:52:23,176 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:52:23,176 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:52:23,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:52:23,176 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:52:23,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:52:23,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:52:23,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:52:23,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:52:23,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:52:23,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:52:23,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:23,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:52:23,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:52:23,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:52:23,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:52:23,180 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:52:23,180 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:52:23,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:52:23,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:52:23,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:52:23,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:52:23,184 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-10-13 23:52:23,184 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2109296505] [2020-10-13 23:52:23,184 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:52:23,185 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 23:52:23,185 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522701686] [2020-10-13 23:52:23,185 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 23:52:23,185 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:52:23,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 23:52:23,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:52:23,186 INFO L87 Difference]: Start difference. First operand 73 states and 82 transitions. Second operand 16 states. [2020-10-13 23:52:23,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:52:23,719 INFO L93 Difference]: Finished difference Result 159 states and 181 transitions. [2020-10-13 23:52:23,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 23:52:23,720 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 60 [2020-10-13 23:52:23,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:52:23,721 INFO L225 Difference]: With dead ends: 159 [2020-10-13 23:52:23,721 INFO L226 Difference]: Without dead ends: 94 [2020-10-13 23:52:23,722 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2020-10-13 23:52:23,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-13 23:52:23,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 64. [2020-10-13 23:52:23,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-13 23:52:23,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 70 transitions. [2020-10-13 23:52:23,735 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 70 transitions. Word has length 60 [2020-10-13 23:52:23,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:52:23,735 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 70 transitions. [2020-10-13 23:52:23,735 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 23:52:23,735 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 70 transitions. [2020-10-13 23:52:23,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-13 23:52:23,736 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:52:23,736 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 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] [2020-10-13 23:52:23,736 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 23:52:23,736 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:52:23,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:52:23,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1262096657, now seen corresponding path program 15 times [2020-10-13 23:52:23,737 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:52:23,737 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [315580585] [2020-10-13 23:52:23,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:52:23,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:52:23,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:23,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:23,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:23,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:24,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:24,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:24,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:25,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:28,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:28,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:28,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:28,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:28,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:28,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:28,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:52:28,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-13 23:52:28,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-13 23:52:28,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-13 23:52:28,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:52:28,767 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:52:28,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 23:52:28,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:52:28,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-13 23:52:28,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:52:28,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:52:28,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:52:28,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:28,926 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:52:28,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:52:28,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:52:28,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:52:28,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:52:28,927 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:52:28,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:52:28,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:52:28,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:52:28,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:52:28,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:52:28,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:52:28,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:28,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:52:28,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:52:28,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:52:28,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:52:28,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:52:28,930 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:52:28,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:52:28,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:52:28,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:52:28,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:52:28,936 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 16 proven. 45 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-10-13 23:52:28,937 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [315580585] [2020-10-13 23:52:28,937 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:52:28,937 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 23:52:28,937 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349224985] [2020-10-13 23:52:28,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 23:52:28,937 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:52:28,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 23:52:28,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:52:28,938 INFO L87 Difference]: Start difference. First operand 64 states and 70 transitions. Second operand 16 states. [2020-10-13 23:52:29,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:52:29,632 INFO L93 Difference]: Finished difference Result 79 states and 86 transitions. [2020-10-13 23:52:29,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 23:52:29,633 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 63 [2020-10-13 23:52:29,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:52:29,634 INFO L225 Difference]: With dead ends: 79 [2020-10-13 23:52:29,635 INFO L226 Difference]: Without dead ends: 73 [2020-10-13 23:52:29,636 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=169, Invalid=643, Unknown=0, NotChecked=0, Total=812 [2020-10-13 23:52:29,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-13 23:52:29,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 66. [2020-10-13 23:52:29,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-13 23:52:29,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 72 transitions. [2020-10-13 23:52:29,647 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 72 transitions. Word has length 63 [2020-10-13 23:52:29,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:52:29,647 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 72 transitions. [2020-10-13 23:52:29,647 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 23:52:29,647 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 72 transitions. [2020-10-13 23:52:29,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-13 23:52:29,648 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:52:29,648 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:52:29,648 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 23:52:29,648 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:52:29,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:52:29,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1669572561, now seen corresponding path program 16 times [2020-10-13 23:52:29,649 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:52:29,649 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1961213924] [2020-10-13 23:52:29,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:52:29,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:52:29,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:30,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:31,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:32,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:34,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:35,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:52:35,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-13 23:52:35,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:52:35,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5447 [2020-10-13 23:52:35,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:52:35,116 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:52:35,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-13 23:52:35,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:52:35,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-13 23:52:35,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 23:52:35,847 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 40 [2020-10-13 23:52:35,978 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 42 [2020-10-13 23:52:36,349 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 51 [2020-10-13 23:52:36,573 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 51 [2020-10-13 23:52:36,743 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 43 [2020-10-13 23:52:36,976 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 48 [2020-10-13 23:52:37,189 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 49 [2020-10-13 23:52:37,352 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 46 [2020-10-13 23:52:37,698 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 56 [2020-10-13 23:52:37,980 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 55 [2020-10-13 23:52:38,400 WARN L193 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 58 [2020-10-13 23:52:38,750 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 55 [2020-10-13 23:52:39,142 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 59 [2020-10-13 23:52:39,490 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 56 [2020-10-13 23:52:39,887 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 60 [2020-10-13 23:52:40,216 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 54 [2020-10-13 23:52:40,583 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 63 [2020-10-13 23:52:40,930 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 63 [2020-10-13 23:52:41,203 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 54 [2020-10-13 23:52:41,458 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 51 [2020-10-13 23:52:41,705 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2020-10-13 23:52:41,907 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 47 [2020-10-13 23:52:42,133 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 61 [2020-10-13 23:52:42,347 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 56 [2020-10-13 23:52:42,566 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 53 [2020-10-13 23:52:42,786 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 51 [2020-10-13 23:52:43,038 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 52 [2020-10-13 23:52:43,260 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 46 [2020-10-13 23:52:43,493 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 45 [2020-10-13 23:52:43,775 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 40 [2020-10-13 23:52:44,087 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 44 [2020-10-13 23:52:44,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:52:44,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:52:44,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:44,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:52:44,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:52:44,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:52:44,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:52:44,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:52:44,765 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:52:44,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:52:44,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:52:44,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:52:44,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:52:44,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:52:44,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:52:44,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:52:44,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:52:44,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:52:44,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:52:44,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:52:44,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:52:44,768 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:52:44,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:52:44,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:52:44,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:52:44,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:52:44,814 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 20 proven. 103 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:52:44,814 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1961213924] [2020-10-13 23:52:44,815 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:52:44,815 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-13 23:52:44,815 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945496485] [2020-10-13 23:52:44,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-13 23:52:44,815 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:52:44,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-13 23:52:44,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=1722, Unknown=0, NotChecked=0, Total=1980 [2020-10-13 23:52:44,817 INFO L87 Difference]: Start difference. First operand 66 states and 72 transitions. Second operand 45 states. [2020-10-13 23:52:45,845 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 68 [2020-10-13 23:52:46,398 WARN L193 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 73 [2020-10-13 23:52:46,903 WARN L193 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 64 [2020-10-13 23:52:47,396 WARN L193 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 73 [2020-10-13 23:52:47,911 WARN L193 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 64 [2020-10-13 23:52:48,434 WARN L193 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 73 [2020-10-13 23:52:48,905 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 64 [2020-10-13 23:52:49,400 WARN L193 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 74 [2020-10-13 23:52:49,856 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 74 [2020-10-13 23:52:50,465 WARN L193 SmtUtils]: Spent 424.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 84 [2020-10-13 23:52:50,711 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 54 [2020-10-13 23:52:50,941 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2020-10-13 23:52:51,758 WARN L193 SmtUtils]: Spent 699.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 117 [2020-10-13 23:52:52,336 WARN L193 SmtUtils]: Spent 450.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 108 [2020-10-13 23:52:52,579 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 58 [2020-10-13 23:52:52,824 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 58 [2020-10-13 23:52:53,474 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 59 [2020-10-13 23:52:53,902 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 59 [2020-10-13 23:52:54,576 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 65 [2020-10-13 23:52:55,071 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 65 [2020-10-13 23:52:55,526 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 64 [2020-10-13 23:52:55,837 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 54 [2020-10-13 23:52:56,258 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 52 [2020-10-13 23:52:56,688 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 93 [2020-10-13 23:52:57,323 WARN L193 SmtUtils]: Spent 457.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 91 [2020-10-13 23:52:57,679 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 60 [2020-10-13 23:52:58,026 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 57 [2020-10-13 23:52:58,372 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 55 [2020-10-13 23:52:58,689 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 58 [2020-10-13 23:52:58,960 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 52 [2020-10-13 23:52:59,283 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 52 [2020-10-13 23:52:59,566 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 46 [2020-10-13 23:52:59,866 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 50 [2020-10-13 23:53:00,459 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 60 [2020-10-13 23:53:00,774 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 58 [2020-10-13 23:53:01,040 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2020-10-13 23:53:01,536 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 51 [2020-10-13 23:53:02,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:53:02,118 INFO L93 Difference]: Finished difference Result 110 states and 123 transitions. [2020-10-13 23:53:02,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-13 23:53:02,120 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 65 [2020-10-13 23:53:02,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:53:02,121 INFO L225 Difference]: With dead ends: 110 [2020-10-13 23:53:02,121 INFO L226 Difference]: Without dead ends: 89 [2020-10-13 23:53:02,125 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2297 ImplicationChecksByTransitivity, 24.0s TimeCoverageRelationStatistics Valid=1379, Invalid=7551, Unknown=0, NotChecked=0, Total=8930 [2020-10-13 23:53:02,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-13 23:53:02,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 69. [2020-10-13 23:53:02,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-13 23:53:02,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 76 transitions. [2020-10-13 23:53:02,139 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 76 transitions. Word has length 65 [2020-10-13 23:53:02,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:53:02,140 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 76 transitions. [2020-10-13 23:53:02,140 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-13 23:53:02,140 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 76 transitions. [2020-10-13 23:53:02,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-13 23:53:02,141 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:53:02,141 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 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] [2020-10-13 23:53:02,141 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 23:53:02,141 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:53:02,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:53:02,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1160099471, now seen corresponding path program 7 times [2020-10-13 23:53:02,142 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:53:02,142 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1314228855] [2020-10-13 23:53:02,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:53:02,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:53:02,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:02,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:02,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:02,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:03,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:03,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:04,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:04,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:04,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:06,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:06,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:06,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:06,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:07,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:07,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:07,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:53:07,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-13 23:53:07,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-13 23:53:07,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-13 23:53:07,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:53:07,176 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:53:07,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 23:53:07,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-13 23:53:07,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-13 23:53:07,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:53:07,609 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 30 [2020-10-13 23:53:07,862 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 31 [2020-10-13 23:53:08,148 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 43 [2020-10-13 23:53:08,387 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 39 [2020-10-13 23:53:08,656 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 48 [2020-10-13 23:53:09,044 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 61 [2020-10-13 23:53:09,202 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 46 [2020-10-13 23:53:09,378 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 25 [2020-10-13 23:53:09,566 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 28 [2020-10-13 23:53:09,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:53:09,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:53:09,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:09,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:53:09,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:53:09,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:53:09,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:53:09,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:53:09,943 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:53:09,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:53:09,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:53:09,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:53:09,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:53:09,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:53:09,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:53:09,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:09,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:53:09,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:53:09,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:53:09,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:53:09,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:53:09,947 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:53:09,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:53:09,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:53:09,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:53:09,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:53:09,962 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 23 proven. 55 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-10-13 23:53:09,962 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1314228855] [2020-10-13 23:53:09,962 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:53:09,962 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 23:53:09,962 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597713125] [2020-10-13 23:53:09,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 23:53:09,963 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:53:09,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 23:53:09,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2020-10-13 23:53:09,964 INFO L87 Difference]: Start difference. First operand 69 states and 76 transitions. Second operand 24 states. [2020-10-13 23:53:10,699 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 46 [2020-10-13 23:53:10,982 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 53 [2020-10-13 23:53:11,392 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 65 [2020-10-13 23:53:11,739 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 72 [2020-10-13 23:53:11,975 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 68 [2020-10-13 23:53:12,306 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 70 [2020-10-13 23:53:13,033 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2020-10-13 23:53:13,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:53:13,224 INFO L93 Difference]: Finished difference Result 107 states and 119 transitions. [2020-10-13 23:53:13,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 23:53:13,227 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 65 [2020-10-13 23:53:13,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:53:13,228 INFO L225 Difference]: With dead ends: 107 [2020-10-13 23:53:13,228 INFO L226 Difference]: Without dead ends: 87 [2020-10-13 23:53:13,229 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=203, Invalid=1437, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 23:53:13,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-13 23:53:13,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 69. [2020-10-13 23:53:13,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-13 23:53:13,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 76 transitions. [2020-10-13 23:53:13,246 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 76 transitions. Word has length 65 [2020-10-13 23:53:13,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:53:13,246 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 76 transitions. [2020-10-13 23:53:13,246 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 23:53:13,247 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 76 transitions. [2020-10-13 23:53:13,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-13 23:53:13,247 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:53:13,247 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 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] [2020-10-13 23:53:13,248 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 23:53:13,248 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:53:13,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:53:13,248 INFO L82 PathProgramCache]: Analyzing trace with hash -1923794861, now seen corresponding path program 8 times [2020-10-13 23:53:13,249 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:53:13,249 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [859104500] [2020-10-13 23:53:13,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:53:13,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:53:13,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:13,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:13,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:13,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:14,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:17,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:18,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:18,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:18,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:18,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:53:18,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-13 23:53:18,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 23:53:18,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-13 23:53:18,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:53:18,276 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:53:18,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 23:53:18,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:53:18,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 23:53:18,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:53:18,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:53:18,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:53:18,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:18,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:53:18,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:53:18,508 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:53:18,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:53:18,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:53:18,509 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:53:18,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:53:18,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:53:18,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:53:18,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:53:18,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:53:18,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:53:18,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:18,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:53:18,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:53:18,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:53:18,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:53:18,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:53:18,513 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:53:18,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:53:18,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:53:18,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:53:18,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:53:18,522 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 29 proven. 31 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2020-10-13 23:53:18,523 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [859104500] [2020-10-13 23:53:18,523 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:53:18,523 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 23:53:18,523 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389084473] [2020-10-13 23:53:18,524 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 23:53:18,524 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:53:18,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 23:53:18,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-13 23:53:18,524 INFO L87 Difference]: Start difference. First operand 69 states and 76 transitions. Second operand 11 states. [2020-10-13 23:53:19,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:53:19,065 INFO L93 Difference]: Finished difference Result 100 states and 111 transitions. [2020-10-13 23:53:19,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 23:53:19,066 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 65 [2020-10-13 23:53:19,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:53:19,067 INFO L225 Difference]: With dead ends: 100 [2020-10-13 23:53:19,068 INFO L226 Difference]: Without dead ends: 69 [2020-10-13 23:53:19,068 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:53:19,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-13 23:53:19,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-10-13 23:53:19,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-13 23:53:19,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 75 transitions. [2020-10-13 23:53:19,080 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 75 transitions. Word has length 65 [2020-10-13 23:53:19,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:53:19,080 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 75 transitions. [2020-10-13 23:53:19,080 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 23:53:19,080 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 75 transitions. [2020-10-13 23:53:19,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-13 23:53:19,081 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:53:19,081 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:53:19,081 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 23:53:19,081 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:53:19,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:53:19,082 INFO L82 PathProgramCache]: Analyzing trace with hash -625661757, now seen corresponding path program 17 times [2020-10-13 23:53:19,082 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:53:19,082 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1467641214] [2020-10-13 23:53:19,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:53:19,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:53:19,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:19,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:19,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:19,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:19,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:19,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:19,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:20,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:20,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:20,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:20,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:20,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:20,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:21,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:21,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:21,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:23,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:23,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:23,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:24,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:53:24,094 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-13 23:53:24,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-13 23:53:24,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 23:53:24,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:53:24,094 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:53:24,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 23:53:24,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-13 23:53:24,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-13 23:53:24,095 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:53:24,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:53:24,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:53:24,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:24,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:53:24,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:53:24,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:53:24,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:53:24,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:53:24,342 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:53:24,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:53:24,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:53:24,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:53:24,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:53:24,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:53:24,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:53:24,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:24,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:53:24,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:53:24,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:53:24,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:53:24,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:53:24,348 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:53:24,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:53:24,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:53:24,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:53:24,348 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:53:24,354 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 51 proven. 55 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-13 23:53:24,355 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1467641214] [2020-10-13 23:53:24,355 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:53:24,355 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 23:53:24,355 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688342509] [2020-10-13 23:53:24,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 23:53:24,356 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:53:24,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 23:53:24,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:53:24,356 INFO L87 Difference]: Start difference. First operand 69 states and 75 transitions. Second operand 18 states. [2020-10-13 23:53:25,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:53:25,514 INFO L93 Difference]: Finished difference Result 108 states and 119 transitions. [2020-10-13 23:53:25,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 23:53:25,515 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 68 [2020-10-13 23:53:25,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:53:25,516 INFO L225 Difference]: With dead ends: 108 [2020-10-13 23:53:25,516 INFO L226 Difference]: Without dead ends: 102 [2020-10-13 23:53:25,517 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=248, Invalid=808, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 23:53:25,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-13 23:53:25,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 71. [2020-10-13 23:53:25,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-13 23:53:25,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 77 transitions. [2020-10-13 23:53:25,529 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 77 transitions. Word has length 68 [2020-10-13 23:53:25,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:53:25,530 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 77 transitions. [2020-10-13 23:53:25,530 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 23:53:25,530 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 77 transitions. [2020-10-13 23:53:25,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-13 23:53:25,530 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:53:25,530 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 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] [2020-10-13 23:53:25,531 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 23:53:25,531 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:53:25,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:53:25,531 INFO L82 PathProgramCache]: Analyzing trace with hash -896811867, now seen corresponding path program 18 times [2020-10-13 23:53:25,531 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:53:25,531 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1738422271] [2020-10-13 23:53:25,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:53:25,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:53:25,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:25,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:25,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:25,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:25,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:25,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:25,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:25,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:25,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:26,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:26,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:30,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:53:30,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-13 23:53:30,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 23:53:30,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 23:53:30,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:53:30,547 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:53:30,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 23:53:30,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:53:30,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-13 23:53:30,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:53:30,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:53:30,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:53:30,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:30,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:53:30,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:53:30,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:53:30,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:53:30,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:53:30,789 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:53:30,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:53:30,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:53:30,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:53:30,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:53:30,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:53:30,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:53:30,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:30,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:53:30,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:53:30,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:53:30,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:53:30,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:53:30,793 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:53:30,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:53:30,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:53:30,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:53:30,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:53:30,798 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-10-13 23:53:30,798 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1738422271] [2020-10-13 23:53:30,798 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:53:30,798 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 23:53:30,798 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810713555] [2020-10-13 23:53:30,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 23:53:30,799 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:53:30,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 23:53:30,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:53:30,799 INFO L87 Difference]: Start difference. First operand 71 states and 77 transitions. Second operand 18 states. [2020-10-13 23:53:31,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:53:31,356 INFO L93 Difference]: Finished difference Result 139 states and 155 transitions. [2020-10-13 23:53:31,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 23:53:31,357 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 70 [2020-10-13 23:53:31,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:53:31,358 INFO L225 Difference]: With dead ends: 139 [2020-10-13 23:53:31,358 INFO L226 Difference]: Without dead ends: 87 [2020-10-13 23:53:31,359 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2020-10-13 23:53:31,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-13 23:53:31,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 73. [2020-10-13 23:53:31,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-13 23:53:31,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 79 transitions. [2020-10-13 23:53:31,373 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 79 transitions. Word has length 70 [2020-10-13 23:53:31,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:53:31,373 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 79 transitions. [2020-10-13 23:53:31,373 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 23:53:31,373 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 79 transitions. [2020-10-13 23:53:31,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-13 23:53:31,374 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:53:31,374 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:53:31,374 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 23:53:31,374 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:53:31,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:53:31,375 INFO L82 PathProgramCache]: Analyzing trace with hash -892678685, now seen corresponding path program 19 times [2020-10-13 23:53:31,375 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:53:31,375 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2129553861] [2020-10-13 23:53:31,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:53:31,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:53:31,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:32,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:35,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:36,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:53:36,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-13 23:53:36,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:53:36,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 23:53:36,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:53:36,403 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:53:36,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 51 [2020-10-13 23:53:36,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:53:36,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-13 23:53:36,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:53:37,802 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 44 [2020-10-13 23:53:37,992 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 49 [2020-10-13 23:53:38,184 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 47 [2020-10-13 23:53:38,608 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 50 [2020-10-13 23:53:38,875 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 52 [2020-10-13 23:53:39,089 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2020-10-13 23:53:39,525 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 53 [2020-10-13 23:53:39,941 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 63 [2020-10-13 23:53:40,313 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 66 [2020-10-13 23:53:40,595 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 61 [2020-10-13 23:53:40,969 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 69 [2020-10-13 23:53:41,296 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 55 [2020-10-13 23:53:41,682 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 63 [2020-10-13 23:53:42,120 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 64 [2020-10-13 23:53:42,417 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 54 [2020-10-13 23:53:42,719 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 53 [2020-10-13 23:53:43,897 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2020-10-13 23:53:46,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:53:46,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:53:46,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:46,310 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:53:46,310 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:53:46,310 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:53:46,310 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:53:46,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:53:46,310 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:53:46,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:53:46,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:53:46,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:53:46,311 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:53:46,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:53:46,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:53:46,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:53:46,313 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:53:46,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:53:46,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:53:46,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:53:46,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:53:46,313 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:53:46,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:53:46,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:53:46,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:53:46,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:53:46,371 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 168 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:53:46,371 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2129553861] [2020-10-13 23:53:46,371 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:53:46,371 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-13 23:53:46,372 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643637461] [2020-10-13 23:53:46,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-13 23:53:46,372 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:53:46,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-13 23:53:46,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=2565, Unknown=0, NotChecked=0, Total=2756 [2020-10-13 23:53:46,373 INFO L87 Difference]: Start difference. First operand 73 states and 79 transitions. Second operand 53 states. [2020-10-13 23:53:47,094 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2020-10-13 23:53:48,854 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 42 [2020-10-13 23:53:49,247 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 47 [2020-10-13 23:53:50,161 WARN L193 SmtUtils]: Spent 484.00 ms on a formula simplification. DAG size of input: 190 DAG size of output: 72 [2020-10-13 23:53:51,055 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 92 [2020-10-13 23:53:52,615 WARN L193 SmtUtils]: Spent 461.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 55 [2020-10-13 23:53:53,332 WARN L193 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 54 [2020-10-13 23:53:54,072 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 61 [2020-10-13 23:53:54,655 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 31