/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/s4lif.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 23:54:49,161 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 23:54:49,164 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 23:54:49,204 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 23:54:49,205 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 23:54:49,212 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 23:54:49,214 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 23:54:49,218 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 23:54:49,220 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 23:54:49,223 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 23:54:49,224 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 23:54:49,224 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 23:54:49,225 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 23:54:49,227 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 23:54:49,230 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 23:54:49,232 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 23:54:49,234 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 23:54:49,236 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 23:54:49,237 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 23:54:49,246 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 23:54:49,248 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 23:54:49,249 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 23:54:49,250 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 23:54:49,251 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 23:54:49,263 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 23:54:49,263 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 23:54:49,264 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 23:54:49,264 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 23:54:49,265 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 23:54:49,266 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 23:54:49,266 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 23:54:49,268 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 23:54:49,268 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 23:54:49,269 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 23:54:49,270 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 23:54:49,270 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 23:54:49,271 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 23:54:49,271 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 23:54:49,271 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 23:54:49,272 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 23:54:49,274 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 23:54:49,275 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 23:54:49,315 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 23:54:49,315 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 23:54:49,317 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 23:54:49,317 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 23:54:49,318 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 23:54:49,318 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 23:54:49,318 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 23:54:49,318 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 23:54:49,319 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 23:54:49,319 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 23:54:49,320 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 23:54:49,320 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 23:54:49,320 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 23:54:49,321 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 23:54:49,321 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 23:54:49,321 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 23:54:49,321 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 23:54:49,322 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 23:54:49,322 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 23:54:49,322 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 23:54:49,322 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 23:54:49,323 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 23:54:49,323 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 23:54:49,323 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 23:54:49,323 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 23:54:49,323 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 23:54:49,324 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 23:54:49,324 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 23:54:49,324 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 23:54:49,324 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 23:54:49,659 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 23:54:49,676 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 23:54:49,683 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 23:54:49,685 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 23:54:49,686 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 23:54:49,686 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/s4lif.c [2020-10-13 23:54:49,746 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8e1c43b04/7707006d42ee41279588a26c3fc0e5b7/FLAGcb3a6daa3 [2020-10-13 23:54:50,249 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 23:54:50,250 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/s4lif.c [2020-10-13 23:54:50,257 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8e1c43b04/7707006d42ee41279588a26c3fc0e5b7/FLAGcb3a6daa3 [2020-10-13 23:54:50,614 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8e1c43b04/7707006d42ee41279588a26c3fc0e5b7 [2020-10-13 23:54:50,622 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 23:54:50,624 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 23:54:50,625 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 23:54:50,625 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 23:54:50,629 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 23:54:50,630 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:54:50" (1/1) ... [2020-10-13 23:54:50,633 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 11:54:50, skipping insertion in model container [2020-10-13 23:54:50,634 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:54:50" (1/1) ... [2020-10-13 23:54:50,642 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 23:54:50,664 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 23:54:50,853 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 23:54:50,862 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 23:54:50,888 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 23:54:50,998 INFO L208 MainTranslator]: Completed translation [2020-10-13 23:54:50,998 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:54:50 WrapperNode [2020-10-13 23:54:50,999 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 23:54:50,999 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 23:54:50,999 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 23:54:51,000 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 23:54:51,012 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:54:50" (1/1) ... [2020-10-13 23:54:51,013 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:54:50" (1/1) ... [2020-10-13 23:54:51,023 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:54:50" (1/1) ... [2020-10-13 23:54:51,023 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:54:50" (1/1) ... [2020-10-13 23:54:51,033 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:54:50" (1/1) ... [2020-10-13 23:54:51,040 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:54:50" (1/1) ... [2020-10-13 23:54:51,044 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:54:50" (1/1) ... [2020-10-13 23:54:51,049 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 23:54:51,052 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 23:54:51,052 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 23:54:51,053 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 23:54:51,054 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:54:50" (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 23:54:51,120 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 23:54:51,120 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 23:54:51,120 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 23:54:51,121 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 23:54:51,121 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 23:54:51,121 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 23:54:51,121 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 23:54:51,121 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 23:54:51,121 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 23:54:51,122 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 23:54:51,122 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-13 23:54:51,122 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 23:54:51,122 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 23:54:51,122 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-13 23:54:51,122 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 23:54:51,123 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 23:54:51,123 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 23:54:51,123 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 23:54:51,123 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 23:54:51,402 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 23:54:51,402 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-13 23:54:51,408 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:54:51 BoogieIcfgContainer [2020-10-13 23:54:51,408 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 23:54:51,410 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 23:54:51,410 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 23:54:51,414 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 23:54:51,414 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 11:54:50" (1/3) ... [2020-10-13 23:54:51,415 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 11:54:51, skipping insertion in model container [2020-10-13 23:54:51,415 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:54:50" (2/3) ... [2020-10-13 23:54:51,415 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 11:54:51, skipping insertion in model container [2020-10-13 23:54:51,416 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:54:51" (3/3) ... [2020-10-13 23:54:51,417 INFO L109 eAbstractionObserver]: Analyzing ICFG s4lif.c [2020-10-13 23:54:51,429 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 23:54:51,439 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 23:54:51,461 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 23:54:51,495 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 23:54:51,495 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 23:54:51,496 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 23:54:51,496 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 23:54:51,496 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 23:54:51,497 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 23:54:51,497 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 23:54:51,497 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 23:54:51,525 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-10-13 23:54:51,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-13 23:54:51,533 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:54:51,534 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 23:54:51,535 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:54:51,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:54:51,543 INFO L82 PathProgramCache]: Analyzing trace with hash -88121349, now seen corresponding path program 1 times [2020-10-13 23:54:51,553 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:54:51,554 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [164253761] [2020-10-13 23:54:51,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:54:51,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:54:51,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:54:51,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:54:51,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:54:51,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:54:52,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:54:52,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-13 23:54:52,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:54:52,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 926 [2020-10-13 23:54:52,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:54:52,622 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:54:52,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:54:52,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-13 23:54:52,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:54:52,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-13 23:54:52,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:54:52,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:54:52,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:54:52,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:54:52,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:54:52,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:54:52,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:54:52,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:54:52,693 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:54:52,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:54:52,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:54:52,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:54:52,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:54:52,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:54:52,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:54:52,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:54:52,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:54:52,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:54:52,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:54:52,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:54:52,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:54:52,704 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:54:52,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:54:52,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-13 23:54:52,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:54:52,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:54:52,710 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 23:54:52,711 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [164253761] [2020-10-13 23:54:52,714 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:54:52,714 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 23:54:52,715 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636967253] [2020-10-13 23:54:52,721 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 23:54:52,721 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:54:52,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 23:54:52,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 23:54:52,739 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2020-10-13 23:54:52,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:54:52,839 INFO L93 Difference]: Finished difference Result 60 states and 77 transitions. [2020-10-13 23:54:52,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 23:54:52,841 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-10-13 23:54:52,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:54:52,850 INFO L225 Difference]: With dead ends: 60 [2020-10-13 23:54:52,850 INFO L226 Difference]: Without dead ends: 28 [2020-10-13 23:54:52,854 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 23:54:52,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-13 23:54:52,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-13 23:54:52,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-13 23:54:52,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2020-10-13 23:54:52,898 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 23 [2020-10-13 23:54:52,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:54:52,898 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2020-10-13 23:54:52,899 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 23:54:52,899 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2020-10-13 23:54:52,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-13 23:54:52,900 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:54:52,900 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 23:54:52,901 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 23:54:52,901 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:54:52,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:54:52,902 INFO L82 PathProgramCache]: Analyzing trace with hash -1099238599, now seen corresponding path program 1 times [2020-10-13 23:54:52,902 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:54:52,902 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [77601859] [2020-10-13 23:54:52,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:54:52,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:54:52,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:54:52,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:54:52,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:54:53,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:54:53,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-13 23:54:53,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:54:53,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 187 [2020-10-13 23:54:53,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:54:53,108 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:54:53,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 23:54:53,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:54:53,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 23:54:53,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:54:53,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:54:53,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:54:53,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:54:53,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:54:53,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:54:53,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:54:53,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 23:54:53,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:54:53,159 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:54:53,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:54:53,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:54:53,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:54:53,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:54:53,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:54:53,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:54:53,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:54:53,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:54:53,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:54:53,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:54:53,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 23:54:53,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:54:53,170 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:54:53,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:54:53,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:54:53,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:54:53,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:54:53,175 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 23:54:53,176 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [77601859] [2020-10-13 23:54:53,176 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:54:53,176 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 23:54:53,177 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124501651] [2020-10-13 23:54:53,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 23:54:53,179 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:54:53,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 23:54:53,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 23:54:53,180 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 5 states. [2020-10-13 23:54:53,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:54:53,302 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2020-10-13 23:54:53,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 23:54:53,303 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-10-13 23:54:53,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:54:53,304 INFO L225 Difference]: With dead ends: 44 [2020-10-13 23:54:53,304 INFO L226 Difference]: Without dead ends: 31 [2020-10-13 23:54:53,305 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 23:54:53,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-13 23:54:53,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-10-13 23:54:53,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-13 23:54:53,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2020-10-13 23:54:53,315 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 23 [2020-10-13 23:54:53,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:54:53,315 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2020-10-13 23:54:53,315 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 23:54:53,316 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2020-10-13 23:54:53,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-13 23:54:53,317 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:54:53,317 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 23:54:53,317 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 23:54:53,318 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:54:53,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:54:53,318 INFO L82 PathProgramCache]: Analyzing trace with hash 188437731, now seen corresponding path program 1 times [2020-10-13 23:54:53,318 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:54:53,319 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2139212591] [2020-10-13 23:54:53,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:54:53,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:54:53,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:54:53,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:54:53,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:54:54,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:54:55,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:54:55,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:54:55,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:54:55,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:54:55,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:54:55,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-13 23:54:55,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 23:54:55,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2374 [2020-10-13 23:54:55,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:54:55,720 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:54:55,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 23:54:55,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:54:55,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 23:54:55,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:54:56,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:54:56,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:54:56,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:54:56,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:54:56,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:54:56,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:54:56,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:54:56,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:54:56,228 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:54:56,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:54:56,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:54:56,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:54:56,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:54:56,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:54:56,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:54:56,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:54:56,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:54:56,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:54:56,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:54:56,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:54:56,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:54:56,241 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:54:56,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:54:56,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:54:56,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:54:56,242 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:54:56,252 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 23:54:56,253 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2139212591] [2020-10-13 23:54:56,253 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:54:56,253 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 23:54:56,254 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106602014] [2020-10-13 23:54:56,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 23:54:56,255 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:54:56,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 23:54:56,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2020-10-13 23:54:56,256 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand 15 states. [2020-10-13 23:54:57,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:54:57,064 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2020-10-13 23:54:57,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 23:54:57,065 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 30 [2020-10-13 23:54:57,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:54:57,066 INFO L225 Difference]: With dead ends: 48 [2020-10-13 23:54:57,067 INFO L226 Difference]: Without dead ends: 42 [2020-10-13 23:54:57,068 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2020-10-13 23:54:57,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-13 23:54:57,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 37. [2020-10-13 23:54:57,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-13 23:54:57,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2020-10-13 23:54:57,076 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 30 [2020-10-13 23:54:57,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:54:57,076 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2020-10-13 23:54:57,076 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 23:54:57,076 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2020-10-13 23:54:57,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-13 23:54:57,077 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:54:57,078 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 23:54:57,078 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 23:54:57,078 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:54:57,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:54:57,079 INFO L82 PathProgramCache]: Analyzing trace with hash 446603169, now seen corresponding path program 1 times [2020-10-13 23:54:57,079 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:54:57,079 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [514188206] [2020-10-13 23:54:57,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:54:57,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:54:57,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:54:57,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:54:57,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:54:57,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:54:58,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:54:58,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-13 23:54:58,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:54:58,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1000 [2020-10-13 23:54:58,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:54:58,094 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:54:58,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 23:54:58,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-13 23:54:58,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 23:54:58,095 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:54:58,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:54:58,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:54:58,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:54:58,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:54:58,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:54:58,217 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:54:58,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:54:58,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:54:58,219 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:54:58,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:54:58,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:54:58,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:54:58,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:54:58,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:54:58,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:54:58,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:54:58,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:54:58,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:54:58,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:54:58,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:54:58,226 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:54:58,227 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:54:58,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:54:58,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:54:58,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:54:58,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:54:58,233 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 23:54:58,234 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [514188206] [2020-10-13 23:54:58,234 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:54:58,234 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 23:54:58,235 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822360516] [2020-10-13 23:54:58,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 23:54:58,236 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:54:58,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 23:54:58,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-13 23:54:58,237 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand 9 states. [2020-10-13 23:54:58,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:54:58,456 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2020-10-13 23:54:58,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 23:54:58,457 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 30 [2020-10-13 23:54:58,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:54:58,458 INFO L225 Difference]: With dead ends: 50 [2020-10-13 23:54:58,458 INFO L226 Difference]: Without dead ends: 40 [2020-10-13 23:54:58,459 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 23:54:58,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-13 23:54:58,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-10-13 23:54:58,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-13 23:54:58,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2020-10-13 23:54:58,468 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 30 [2020-10-13 23:54:58,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:54:58,468 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2020-10-13 23:54:58,469 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 23:54:58,469 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2020-10-13 23:54:58,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-13 23:54:58,470 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:54:58,470 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 23:54:58,470 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 23:54:58,470 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:54:58,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:54:58,471 INFO L82 PathProgramCache]: Analyzing trace with hash -231251771, now seen corresponding path program 2 times [2020-10-13 23:54:58,471 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:54:58,471 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1658023487] [2020-10-13 23:54:58,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:54:58,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:54:58,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:54:58,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:54:59,134 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:54:59,135 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-13 23:54:59,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:54:59,135 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 652 [2020-10-13 23:54:59,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:54:59,136 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:54:59,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 23:54:59,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:54:59,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-13 23:54:59,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:54:59,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:54:59,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:54:59,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:54:59,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:54:59,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:54:59,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:54:59,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:54:59,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:54:59,201 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:54:59,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:54:59,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:54:59,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:54:59,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:54:59,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:54:59,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:54:59,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:54:59,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:54:59,208 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:54:59,208 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:54:59,208 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:54:59,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:54:59,209 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:54:59,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:54:59,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:54:59,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:54:59,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:54:59,213 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 23:54:59,214 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1658023487] [2020-10-13 23:54:59,214 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:54:59,214 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 23:54:59,215 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249121146] [2020-10-13 23:54:59,215 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 23:54:59,215 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:54:59,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 23:54:59,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-13 23:54:59,216 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand 8 states. [2020-10-13 23:54:59,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:54:59,437 INFO L93 Difference]: Finished difference Result 82 states and 96 transitions. [2020-10-13 23:54:59,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 23:54:59,437 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2020-10-13 23:54:59,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:54:59,439 INFO L225 Difference]: With dead ends: 82 [2020-10-13 23:54:59,439 INFO L226 Difference]: Without dead ends: 55 [2020-10-13 23:54:59,440 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-13 23:54:59,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-13 23:54:59,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 39. [2020-10-13 23:54:59,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-13 23:54:59,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2020-10-13 23:54:59,448 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 32 [2020-10-13 23:54:59,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:54:59,448 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2020-10-13 23:54:59,448 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 23:54:59,448 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2020-10-13 23:54:59,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-13 23:54:59,450 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:54:59,450 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 23:54:59,450 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 23:54:59,450 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:54:59,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:54:59,451 INFO L82 PathProgramCache]: Analyzing trace with hash 1341613535, now seen corresponding path program 3 times [2020-10-13 23:54:59,451 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:54:59,451 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [151844105] [2020-10-13 23:54:59,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:54:59,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:54:59,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:54:59,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:54:59,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:54:59,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:54:59,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:54:59,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:00,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:01,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:01,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:02,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:03,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:55:03,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-13 23:55:03,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 23:55:03,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3542 [2020-10-13 23:55:03,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:55:03,006 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:55:03,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 23:55:03,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:55:03,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 23:55:03,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:55:03,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:55:03,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:55:03,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:03,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:55:03,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:55:03,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:55:03,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:55:03,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:55:03,070 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:55:03,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:55:03,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:55:03,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:55:03,072 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:55:03,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:55:03,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:55:03,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:03,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:55:03,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:55:03,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:55:03,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:55:03,079 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:55:03,079 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:55:03,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:55:03,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:55:03,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:55:03,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:55:03,084 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 23:55:03,084 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [151844105] [2020-10-13 23:55:03,085 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:55:03,085 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 23:55:03,085 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452825370] [2020-10-13 23:55:03,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 23:55:03,086 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:55:03,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 23:55:03,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-13 23:55:03,086 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand 8 states. [2020-10-13 23:55:03,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:55:03,337 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2020-10-13 23:55:03,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 23:55:03,338 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 35 [2020-10-13 23:55:03,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:55:03,339 INFO L225 Difference]: With dead ends: 49 [2020-10-13 23:55:03,339 INFO L226 Difference]: Without dead ends: 43 [2020-10-13 23:55:03,340 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 23:55:03,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-13 23:55:03,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2020-10-13 23:55:03,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-13 23:55:03,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2020-10-13 23:55:03,347 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 35 [2020-10-13 23:55:03,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:55:03,348 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2020-10-13 23:55:03,348 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 23:55:03,348 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2020-10-13 23:55:03,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-13 23:55:03,349 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:55:03,350 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 23:55:03,350 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 23:55:03,350 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:55:03,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:55:03,351 INFO L82 PathProgramCache]: Analyzing trace with hash -130866495, now seen corresponding path program 4 times [2020-10-13 23:55:03,351 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:55:03,351 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [355216287] [2020-10-13 23:55:03,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:55:03,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:55:03,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:03,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:03,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:04,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:04,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:04,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:05,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:05,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:05,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:05,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:06,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:06,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:06,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:07,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:07,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:08,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:08,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:08,376 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:55:08,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-13 23:55:08,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-13 23:55:08,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 23:55:08,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:55:08,377 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:55:08,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 23:55:08,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:55:08,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 23:55:08,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:55:09,234 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2020-10-13 23:55:10,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:55:10,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:55:10,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:10,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:55:10,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:55:10,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:55:10,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:55:10,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:55:10,108 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:55:10,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:55:10,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:55:10,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:55:10,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:55:10,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:55:10,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:55:10,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:10,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:55:10,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:55:10,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:55:10,113 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:55:10,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:55:10,114 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:55:10,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:55:10,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:55:10,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:55:10,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:55:10,127 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 23:55:10,128 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [355216287] [2020-10-13 23:55:10,128 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:55:10,128 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 23:55:10,129 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831970615] [2020-10-13 23:55:10,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 23:55:10,129 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:55:10,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 23:55:10,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=414, Unknown=0, NotChecked=0, Total=462 [2020-10-13 23:55:10,130 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand 22 states. [2020-10-13 23:55:10,620 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 42 [2020-10-13 23:55:11,325 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 67 [2020-10-13 23:55:11,477 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2020-10-13 23:55:11,676 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2020-10-13 23:55:12,068 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 50 [2020-10-13 23:55:12,400 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 47 [2020-10-13 23:55:12,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:55:12,954 INFO L93 Difference]: Finished difference Result 70 states and 81 transitions. [2020-10-13 23:55:12,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 23:55:12,955 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 37 [2020-10-13 23:55:12,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:55:12,959 INFO L225 Difference]: With dead ends: 70 [2020-10-13 23:55:12,959 INFO L226 Difference]: Without dead ends: 64 [2020-10-13 23:55:12,961 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=172, Invalid=1388, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 23:55:12,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-13 23:55:12,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 54. [2020-10-13 23:55:12,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-13 23:55:12,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2020-10-13 23:55:12,971 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 37 [2020-10-13 23:55:12,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:55:12,971 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2020-10-13 23:55:12,972 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 23:55:12,972 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2020-10-13 23:55:12,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-13 23:55:12,972 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:55:12,973 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 23:55:12,973 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 23:55:12,973 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:55:12,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:55:12,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1141983745, now seen corresponding path program 1 times [2020-10-13 23:55:12,974 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:55:12,974 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1208512827] [2020-10-13 23:55:12,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:55:12,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:55:12,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:13,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:13,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:13,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:13,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:14,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:14,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:15,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:55:15,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-13 23:55:15,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 23:55:15,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2430 [2020-10-13 23:55:15,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:55:15,418 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:55:15,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 23:55:15,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:55:15,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 23:55:15,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:55:15,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:55:15,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:55:15,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:15,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:55:15,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:55:15,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:55:15,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:55:15,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:55:15,587 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:55:15,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:55:15,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:55:15,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:55:15,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:55:15,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:55:15,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:55:15,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:15,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:55:15,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:55:15,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:55:15,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:55:15,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:55:15,592 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:55:15,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:55:15,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:55:15,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:55:15,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:55:15,597 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 23:55:15,597 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1208512827] [2020-10-13 23:55:15,598 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:55:15,598 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 23:55:15,598 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357903160] [2020-10-13 23:55:15,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 23:55:15,599 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:55:15,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 23:55:15,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2020-10-13 23:55:15,600 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand 13 states. [2020-10-13 23:55:16,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:55:16,084 INFO L93 Difference]: Finished difference Result 72 states and 83 transitions. [2020-10-13 23:55:16,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 23:55:16,085 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 37 [2020-10-13 23:55:16,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:55:16,086 INFO L225 Difference]: With dead ends: 72 [2020-10-13 23:55:16,086 INFO L226 Difference]: Without dead ends: 60 [2020-10-13 23:55:16,087 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=318, Unknown=0, NotChecked=0, Total=420 [2020-10-13 23:55:16,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-13 23:55:16,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 52. [2020-10-13 23:55:16,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-13 23:55:16,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 61 transitions. [2020-10-13 23:55:16,110 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 61 transitions. Word has length 37 [2020-10-13 23:55:16,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:55:16,111 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 61 transitions. [2020-10-13 23:55:16,111 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 23:55:16,111 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 61 transitions. [2020-10-13 23:55:16,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-13 23:55:16,115 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:55:16,115 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 23:55:16,116 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 23:55:16,116 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:55:16,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:55:16,116 INFO L82 PathProgramCache]: Analyzing trace with hash -1719214397, now seen corresponding path program 2 times [2020-10-13 23:55:16,117 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:55:16,120 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1076409813] [2020-10-13 23:55:16,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:55:16,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:55:16,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:16,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:16,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:16,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:16,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:16,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:17,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:55:17,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-13 23:55:17,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:55:17,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1398 [2020-10-13 23:55:17,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:55:17,537 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:55:17,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 23:55:17,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:55:17,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 23:55:17,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:55:17,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:55:17,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:55:17,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:17,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:55:17,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:55:17,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:55:17,608 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:55:17,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:55:17,609 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:55:17,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:55:17,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:55:17,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:55:17,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:55:17,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:55:17,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:55:17,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:17,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:55:17,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:55:17,614 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:55:17,614 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:55:17,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:55:17,614 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:55:17,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:55:17,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:55:17,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:55:17,615 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:55:17,621 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 23:55:17,622 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1076409813] [2020-10-13 23:55:17,622 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:55:17,622 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 23:55:17,622 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083818592] [2020-10-13 23:55:17,624 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 23:55:17,624 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:55:17,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 23:55:17,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-13 23:55:17,625 INFO L87 Difference]: Start difference. First operand 52 states and 61 transitions. Second operand 7 states. [2020-10-13 23:55:17,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:55:17,777 INFO L93 Difference]: Finished difference Result 73 states and 85 transitions. [2020-10-13 23:55:17,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 23:55:17,778 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 37 [2020-10-13 23:55:17,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:55:17,779 INFO L225 Difference]: With dead ends: 73 [2020-10-13 23:55:17,779 INFO L226 Difference]: Without dead ends: 55 [2020-10-13 23:55:17,782 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 23:55:17,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-13 23:55:17,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2020-10-13 23:55:17,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-13 23:55:17,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2020-10-13 23:55:17,796 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 37 [2020-10-13 23:55:17,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:55:17,796 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2020-10-13 23:55:17,796 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 23:55:17,796 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2020-10-13 23:55:17,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-13 23:55:17,801 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:55:17,801 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 23:55:17,801 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 23:55:17,801 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:55:17,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:55:17,802 INFO L82 PathProgramCache]: Analyzing trace with hash -2139934941, now seen corresponding path program 5 times [2020-10-13 23:55:17,804 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:55:17,804 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [593335620] [2020-10-13 23:55:17,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:55:17,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:55:17,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:17,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:18,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:55:18,672 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-13 23:55:18,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:55:18,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 854 [2020-10-13 23:55:18,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:55:18,672 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:55:18,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 23:55:18,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:55:18,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 23:55:18,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:55:18,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:55:18,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:55:18,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:18,750 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:55:18,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:55:18,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:55:18,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:55:18,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:55:18,751 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:55:18,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:55:18,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:55:18,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:55:18,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:55:18,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:55:18,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:55:18,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:18,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:55:18,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:55:18,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:55:18,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:55:18,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:55:18,759 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:55:18,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:55:18,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:55:18,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:55:18,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:55:18,763 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 23:55:18,763 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [593335620] [2020-10-13 23:55:18,763 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:55:18,763 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 23:55:18,764 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872438915] [2020-10-13 23:55:18,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 23:55:18,764 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:55:18,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 23:55:18,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:55:18,765 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand 10 states. [2020-10-13 23:55:19,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:55:19,006 INFO L93 Difference]: Finished difference Result 102 states and 117 transitions. [2020-10-13 23:55:19,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 23:55:19,007 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2020-10-13 23:55:19,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:55:19,008 INFO L225 Difference]: With dead ends: 102 [2020-10-13 23:55:19,008 INFO L226 Difference]: Without dead ends: 68 [2020-10-13 23:55:19,010 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-10-13 23:55:19,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-13 23:55:19,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 52. [2020-10-13 23:55:19,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-13 23:55:19,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 58 transitions. [2020-10-13 23:55:19,018 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 58 transitions. Word has length 39 [2020-10-13 23:55:19,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:55:19,018 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 58 transitions. [2020-10-13 23:55:19,018 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 23:55:19,018 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 58 transitions. [2020-10-13 23:55:19,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-13 23:55:19,019 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:55:19,019 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 23:55:19,019 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 23:55:19,019 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:55:19,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:55:19,020 INFO L82 PathProgramCache]: Analyzing trace with hash -356877885, now seen corresponding path program 6 times [2020-10-13 23:55:19,020 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:55:19,020 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [115567303] [2020-10-13 23:55:19,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:55:19,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:55:19,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:19,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:19,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:19,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:19,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:20,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:20,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:20,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:21,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:21,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:22,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:23,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:23,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:23,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:23,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:55:23,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-13 23:55:23,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-13 23:55:23,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4809 [2020-10-13 23:55:23,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:55:23,840 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:55:23,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 23:55:23,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:55:23,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 23:55:23,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:55:23,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:55:23,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:55:23,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:23,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:55:23,916 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:55:23,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:55:23,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:55:23,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:55:23,916 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:55:23,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:55:23,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:55:23,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:55:23,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:55:23,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:55:23,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:55:23,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:23,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:55:23,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:55:23,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:55:23,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:55:23,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:55:23,922 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:55:23,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:55:23,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:55:23,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:55:23,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:55:23,925 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-13 23:55:23,926 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [115567303] [2020-10-13 23:55:23,926 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:55:23,926 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 23:55:23,926 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282060725] [2020-10-13 23:55:23,927 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 23:55:23,927 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:55:23,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 23:55:23,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:55:23,928 INFO L87 Difference]: Start difference. First operand 52 states and 58 transitions. Second operand 10 states. [2020-10-13 23:55:24,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:55:24,204 INFO L93 Difference]: Finished difference Result 62 states and 68 transitions. [2020-10-13 23:55:24,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 23:55:24,205 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2020-10-13 23:55:24,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:55:24,206 INFO L225 Difference]: With dead ends: 62 [2020-10-13 23:55:24,206 INFO L226 Difference]: Without dead ends: 50 [2020-10-13 23:55:24,207 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2020-10-13 23:55:24,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-13 23:55:24,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2020-10-13 23:55:24,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-13 23:55:24,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2020-10-13 23:55:24,216 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 39 [2020-10-13 23:55:24,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:55:24,217 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2020-10-13 23:55:24,217 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 23:55:24,217 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2020-10-13 23:55:24,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-13 23:55:24,217 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:55:24,218 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 23:55:24,218 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 23:55:24,218 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:55:24,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:55:24,219 INFO L82 PathProgramCache]: Analyzing trace with hash 352759267, now seen corresponding path program 7 times [2020-10-13 23:55:24,219 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:55:24,219 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [79691194] [2020-10-13 23:55:24,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:55:24,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:55:24,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:24,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:24,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:25,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:25,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:25,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:26,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:26,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:27,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:27,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:27,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:28,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:28,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:28,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:28,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:28,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:29,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:29,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:55:29,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-13 23:55:29,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-13 23:55:29,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5042 [2020-10-13 23:55:29,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:55:29,275 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:55:29,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 23:55:29,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:55:29,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-13 23:55:29,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:55:30,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:55:30,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:55:30,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:30,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:55:30,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:55:30,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:55:30,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:55:30,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:55:30,908 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:55:30,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:55:30,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:55:30,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:55:30,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:55:30,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:55:30,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:55:30,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:30,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:55:30,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:55:30,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:55:30,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:55:30,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:55:30,915 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:55:30,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:55:30,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:55:30,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:55:30,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:55:30,934 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 23:55:30,934 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [79691194] [2020-10-13 23:55:30,934 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:55:30,935 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 23:55:30,935 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960996422] [2020-10-13 23:55:30,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 23:55:30,936 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:55:30,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 23:55:30,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2020-10-13 23:55:30,938 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand 27 states. [2020-10-13 23:55:32,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:55:32,659 INFO L93 Difference]: Finished difference Result 70 states and 78 transitions. [2020-10-13 23:55:32,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-13 23:55:32,659 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 44 [2020-10-13 23:55:32,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:55:32,661 INFO L225 Difference]: With dead ends: 70 [2020-10-13 23:55:32,661 INFO L226 Difference]: Without dead ends: 64 [2020-10-13 23:55:32,662 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=154, Invalid=1486, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 23:55:32,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-13 23:55:32,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 54. [2020-10-13 23:55:32,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-13 23:55:32,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2020-10-13 23:55:32,675 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 44 [2020-10-13 23:55:32,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:55:32,676 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2020-10-13 23:55:32,676 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 23:55:32,676 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2020-10-13 23:55:32,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-13 23:55:32,676 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:55:32,677 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 23:55:32,677 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 23:55:32,677 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:55:32,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:55:32,677 INFO L82 PathProgramCache]: Analyzing trace with hash -668309087, now seen corresponding path program 3 times [2020-10-13 23:55:32,678 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:55:32,678 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1007457113] [2020-10-13 23:55:32,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:55:32,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:55:32,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:32,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:32,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:32,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:33,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:33,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:33,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:33,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:34,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:34,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:35,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:36,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:37,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:55:37,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-13 23:55:37,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 23:55:37,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 23:55:37,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:55:37,692 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:55:37,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 23:55:37,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-13 23:55:37,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 23:55:37,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:55:38,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:55:38,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:55:38,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:38,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:55:38,071 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:55:38,071 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:55:38,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:55:38,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:55:38,072 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:55:38,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:55:38,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:55:38,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:55:38,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:55:38,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:55:38,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:55:38,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:38,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:55:38,080 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:55:38,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:55:38,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:55:38,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:55:38,081 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:55:38,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:55:38,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:55:38,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:55:38,082 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:55:38,105 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 23:55:38,105 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1007457113] [2020-10-13 23:55:38,106 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:55:38,106 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 23:55:38,106 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919710318] [2020-10-13 23:55:38,107 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 23:55:38,107 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:55:38,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 23:55:38,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-10-13 23:55:38,107 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand 15 states. [2020-10-13 23:55:39,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:55:39,158 INFO L93 Difference]: Finished difference Result 82 states and 92 transitions. [2020-10-13 23:55:39,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 23:55:39,160 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 44 [2020-10-13 23:55:39,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:55:39,161 INFO L225 Difference]: With dead ends: 82 [2020-10-13 23:55:39,161 INFO L226 Difference]: Without dead ends: 76 [2020-10-13 23:55:39,162 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=175, Invalid=755, Unknown=0, NotChecked=0, Total=930 [2020-10-13 23:55:39,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-13 23:55:39,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 60. [2020-10-13 23:55:39,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-13 23:55:39,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 70 transitions. [2020-10-13 23:55:39,173 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 70 transitions. Word has length 44 [2020-10-13 23:55:39,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:55:39,173 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 70 transitions. [2020-10-13 23:55:39,173 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 23:55:39,173 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 70 transitions. [2020-10-13 23:55:39,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-13 23:55:39,174 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:55:39,174 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 23:55:39,174 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 23:55:39,174 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:55:39,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:55:39,175 INFO L82 PathProgramCache]: Analyzing trace with hash -1336184475, now seen corresponding path program 4 times [2020-10-13 23:55:39,175 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:55:39,175 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2136543913] [2020-10-13 23:55:39,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:55:39,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:55:39,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:39,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:39,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:39,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:39,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:39,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:39,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:39,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:40,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:42,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:42,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:42,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:42,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:44,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:55:44,186 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-13 23:55:44,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-13 23:55:44,186 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 23:55:44,186 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:55:44,186 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:55:44,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 23:55:44,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-13 23:55:44,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 23:55:44,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:55:44,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:55:44,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:55:44,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:44,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:55:44,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:55:44,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:55:44,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:55:44,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:55:44,507 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:55:44,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:55:44,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:55:44,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:55:44,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:55:44,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:55:44,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:55:44,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:44,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:55:44,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:55:44,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:55:44,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:55:44,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:55:44,512 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:55:44,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:55:44,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:55:44,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:55:44,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:55:44,518 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 23:55:44,518 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2136543913] [2020-10-13 23:55:44,518 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:55:44,518 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 23:55:44,519 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941706844] [2020-10-13 23:55:44,519 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 23:55:44,519 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:55:44,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 23:55:44,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:55:44,520 INFO L87 Difference]: Start difference. First operand 60 states and 70 transitions. Second operand 14 states. [2020-10-13 23:55:45,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:55:45,488 INFO L93 Difference]: Finished difference Result 84 states and 98 transitions. [2020-10-13 23:55:45,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 23:55:45,489 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 44 [2020-10-13 23:55:45,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:55:45,490 INFO L225 Difference]: With dead ends: 84 [2020-10-13 23:55:45,490 INFO L226 Difference]: Without dead ends: 67 [2020-10-13 23:55:45,492 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 23:55:45,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-13 23:55:45,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2020-10-13 23:55:45,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-13 23:55:45,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 74 transitions. [2020-10-13 23:55:45,522 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 74 transitions. Word has length 44 [2020-10-13 23:55:45,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:55:45,522 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 74 transitions. [2020-10-13 23:55:45,522 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 23:55:45,522 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 74 transitions. [2020-10-13 23:55:45,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-13 23:55:45,525 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:55:45,525 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 23:55:45,526 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 23:55:45,526 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:55:45,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:55:45,526 INFO L82 PathProgramCache]: Analyzing trace with hash -1232045627, now seen corresponding path program 8 times [2020-10-13 23:55:45,526 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:55:45,527 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1107079004] [2020-10-13 23:55:45,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:55:45,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:55:45,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:45,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:46,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:55:46,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-13 23:55:46,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:55:46,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 878 [2020-10-13 23:55:46,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:55:46,420 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:55:46,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 23:55:46,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:55:46,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-13 23:55:46,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:55:46,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:55:46,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:55:46,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:46,520 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:55:46,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:55:46,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:55:46,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:55:46,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:55:46,520 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:55:46,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:55:46,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:55:46,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:55:46,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:55:46,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:55:46,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:55:46,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:46,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:55:46,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:55:46,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:55:46,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:55:46,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:55:46,523 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:55:46,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:55:46,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:55:46,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:55:46,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:55:46,527 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 23:55:46,527 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1107079004] [2020-10-13 23:55:46,527 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:55:46,527 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 23:55:46,528 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126226937] [2020-10-13 23:55:46,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 23:55:46,528 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:55:46,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 23:55:46,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:55:46,529 INFO L87 Difference]: Start difference. First operand 64 states and 74 transitions. Second operand 12 states. [2020-10-13 23:55:46,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:55:46,897 INFO L93 Difference]: Finished difference Result 142 states and 164 transitions. [2020-10-13 23:55:46,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 23:55:46,898 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 46 [2020-10-13 23:55:46,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:55:46,899 INFO L225 Difference]: With dead ends: 142 [2020-10-13 23:55:46,899 INFO L226 Difference]: Without dead ends: 88 [2020-10-13 23:55:46,900 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 23:55:46,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-13 23:55:46,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 61. [2020-10-13 23:55:46,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-13 23:55:46,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 69 transitions. [2020-10-13 23:55:46,915 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 69 transitions. Word has length 46 [2020-10-13 23:55:46,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:55:46,915 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 69 transitions. [2020-10-13 23:55:46,915 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 23:55:46,915 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 69 transitions. [2020-10-13 23:55:46,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-13 23:55:46,916 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:55:46,916 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 23:55:46,916 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 23:55:46,917 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:55:46,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:55:46,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1566508697, now seen corresponding path program 9 times [2020-10-13 23:55:46,917 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:55:46,918 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1474237420] [2020-10-13 23:55:46,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:55:46,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:55:46,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:46,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:46,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:47,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:47,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:47,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:47,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:47,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:47,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:47,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:48,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:48,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:48,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:48,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:48,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:48,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:48,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:48,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:48,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:48,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:49,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:49,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:49,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:49,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:49,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:49,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:49,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:49,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:49,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:50,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:50,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:51,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:51,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:51,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:51,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:51,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:51,927 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:55:51,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-13 23:55:51,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 36 [2020-10-13 23:55:51,927 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 23:55:51,927 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:55:51,928 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:55:51,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 23:55:51,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:55:51,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 23:55:51,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:55:52,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:55:52,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:55:52,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:52,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:55:52,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:55:52,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:55:52,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:55:52,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:55:52,023 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:55:52,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:55:52,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:55:52,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:55:52,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:55:52,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:55:52,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:55:52,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:52,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:55:52,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:55:52,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:55:52,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:55:52,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:55:52,027 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:55:52,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:55:52,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:55:52,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:55:52,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:55:52,029 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 23:55:52,030 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1474237420] [2020-10-13 23:55:52,030 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:55:52,030 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 23:55:52,030 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733589526] [2020-10-13 23:55:52,031 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 23:55:52,031 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:55:52,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 23:55:52,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:55:52,032 INFO L87 Difference]: Start difference. First operand 61 states and 69 transitions. Second operand 12 states. [2020-10-13 23:55:52,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:55:52,436 INFO L93 Difference]: Finished difference Result 76 states and 84 transitions. [2020-10-13 23:55:52,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 23:55:52,436 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 49 [2020-10-13 23:55:52,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:55:52,437 INFO L225 Difference]: With dead ends: 76 [2020-10-13 23:55:52,438 INFO L226 Difference]: Without dead ends: 70 [2020-10-13 23:55:52,439 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 23:55:52,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-13 23:55:52,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 52. [2020-10-13 23:55:52,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-13 23:55:52,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 57 transitions. [2020-10-13 23:55:52,446 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 57 transitions. Word has length 49 [2020-10-13 23:55:52,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:55:52,447 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 57 transitions. [2020-10-13 23:55:52,447 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 23:55:52,447 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 57 transitions. [2020-10-13 23:55:52,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-13 23:55:52,447 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:55:52,447 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 23:55:52,448 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 23:55:52,448 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:55:52,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:55:52,448 INFO L82 PathProgramCache]: Analyzing trace with hash 1187378249, now seen corresponding path program 10 times [2020-10-13 23:55:52,448 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:55:52,448 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [59009705] [2020-10-13 23:55:52,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:55:52,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:55:52,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:52,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:53,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:53,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:54,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:55,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:55,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:55,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:56,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:56,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:56,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:57,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:57,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:57,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:57,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:55:57,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-13 23:55:57,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-13 23:55:57,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5189 [2020-10-13 23:55:57,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:55:57,652 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:55:57,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-13 23:55:57,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:55:57,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 23:55:57,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:55:59,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:55:59,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:55:59,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:59,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:55:59,534 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:55:59,534 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:55:59,534 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:55:59,534 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:55:59,535 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:55:59,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:55:59,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:55:59,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:55:59,535 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:55:59,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:55:59,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:55:59,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:55:59,538 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:55:59,538 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:55:59,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:55:59,539 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:55:59,539 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:55:59,539 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:55:59,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:55:59,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:55:59,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:55:59,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:55:59,556 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 6 proven. 42 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-13 23:55:59,557 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [59009705] [2020-10-13 23:55:59,557 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:55:59,557 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-13 23:55:59,558 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463468872] [2020-10-13 23:55:59,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-13 23:55:59,558 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:55:59,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-13 23:55:59,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=756, Unknown=0, NotChecked=0, Total=870 [2020-10-13 23:55:59,559 INFO L87 Difference]: Start difference. First operand 52 states and 57 transitions. Second operand 30 states. [2020-10-13 23:56:00,268 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2020-10-13 23:56:00,937 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 68 [2020-10-13 23:56:01,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:56:01,958 INFO L93 Difference]: Finished difference Result 85 states and 95 transitions. [2020-10-13 23:56:01,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-13 23:56:01,959 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 51 [2020-10-13 23:56:01,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:56:01,960 INFO L225 Difference]: With dead ends: 85 [2020-10-13 23:56:01,960 INFO L226 Difference]: Without dead ends: 68 [2020-10-13 23:56:01,964 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=240, Invalid=1652, Unknown=0, NotChecked=0, Total=1892 [2020-10-13 23:56:01,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-13 23:56:01,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 55. [2020-10-13 23:56:01,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-13 23:56:01,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 61 transitions. [2020-10-13 23:56:01,984 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 61 transitions. Word has length 51 [2020-10-13 23:56:01,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:56:01,984 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 61 transitions. [2020-10-13 23:56:01,984 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-13 23:56:01,984 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 61 transitions. [2020-10-13 23:56:01,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-13 23:56:01,985 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:56:01,985 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 23:56:01,985 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 23:56:01,985 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:56:01,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:56:01,986 INFO L82 PathProgramCache]: Analyzing trace with hash 1053364743, now seen corresponding path program 5 times [2020-10-13 23:56:01,986 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:56:01,986 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [482654479] [2020-10-13 23:56:01,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:56:01,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:56:02,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:02,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:02,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:02,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:02,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:02,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:03,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:03,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:04,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:04,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:04,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:04,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:04,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:04,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:04,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:05,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:05,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:05,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:07,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:56:07,004 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-13 23:56:07,004 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-13 23:56:07,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 23:56:07,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:56:07,005 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:56:07,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 23:56:07,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:56:07,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 23:56:07,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:56:07,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:56:07,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:56:07,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:07,104 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:56:07,104 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:56:07,104 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:56:07,104 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:56:07,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:56:07,105 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:56:07,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:56:07,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:56:07,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:56:07,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:56:07,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:56:07,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:56:07,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:07,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:56:07,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:56:07,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:56:07,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:56:07,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:56:07,108 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:56:07,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:56:07,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:56:07,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:56:07,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:56:07,113 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 23:56:07,114 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [482654479] [2020-10-13 23:56:07,114 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:56:07,114 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 23:56:07,114 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954858678] [2020-10-13 23:56:07,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 23:56:07,115 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:56:07,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 23:56:07,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-13 23:56:07,116 INFO L87 Difference]: Start difference. First operand 55 states and 61 transitions. Second operand 9 states. [2020-10-13 23:56:07,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:56:07,426 INFO L93 Difference]: Finished difference Result 79 states and 88 transitions. [2020-10-13 23:56:07,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 23:56:07,427 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 51 [2020-10-13 23:56:07,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:56:07,428 INFO L225 Difference]: With dead ends: 79 [2020-10-13 23:56:07,428 INFO L226 Difference]: Without dead ends: 55 [2020-10-13 23:56:07,429 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 23:56:07,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-13 23:56:07,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-10-13 23:56:07,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-13 23:56:07,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 60 transitions. [2020-10-13 23:56:07,437 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 60 transitions. Word has length 51 [2020-10-13 23:56:07,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:56:07,437 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 60 transitions. [2020-10-13 23:56:07,437 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 23:56:07,438 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 60 transitions. [2020-10-13 23:56:07,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-13 23:56:07,438 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:56:07,438 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 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 23:56:07,439 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 23:56:07,439 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:56:07,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:56:07,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1105155907, now seen corresponding path program 11 times [2020-10-13 23:56:07,439 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:56:07,440 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [678271878] [2020-10-13 23:56:07,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:56:07,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:56:07,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:07,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:07,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:07,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:07,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:07,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:07,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:07,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:07,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:08,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:08,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:08,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:08,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:08,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:09,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:09,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:09,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:10,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:10,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:10,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:10,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:10,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:11,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:11,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:11,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:12,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:56:12,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-13 23:56:12,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 25 [2020-10-13 23:56:12,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 23:56:12,449 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:56:12,449 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:56:12,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 23:56:12,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:56:12,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 23:56:12,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:56:12,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:56:12,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:56:12,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:12,606 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:56:12,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:56:12,607 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:56:12,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:56:12,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:56:12,608 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:56:12,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:56:12,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:56:12,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:56:12,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:56:12,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:56:12,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:56:12,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:12,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:56:12,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:56:12,614 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:56:12,614 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:56:12,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:56:12,615 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:56:12,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:56:12,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:56:12,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:56:12,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:56:12,622 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 35 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-13 23:56:12,623 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [678271878] [2020-10-13 23:56:12,623 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:56:12,623 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 23:56:12,624 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415200529] [2020-10-13 23:56:12,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 23:56:12,628 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:56:12,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 23:56:12,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:56:12,629 INFO L87 Difference]: Start difference. First operand 55 states and 60 transitions. Second operand 14 states. [2020-10-13 23:56:13,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:56:13,069 INFO L93 Difference]: Finished difference Result 119 states and 133 transitions. [2020-10-13 23:56:13,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 23:56:13,070 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 54 [2020-10-13 23:56:13,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:56:13,071 INFO L225 Difference]: With dead ends: 119 [2020-10-13 23:56:13,071 INFO L226 Difference]: Without dead ends: 79 [2020-10-13 23:56:13,072 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 23:56:13,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-13 23:56:13,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 57. [2020-10-13 23:56:13,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-13 23:56:13,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 62 transitions. [2020-10-13 23:56:13,085 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 62 transitions. Word has length 54 [2020-10-13 23:56:13,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:56:13,085 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 62 transitions. [2020-10-13 23:56:13,085 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 23:56:13,085 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 62 transitions. [2020-10-13 23:56:13,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-13 23:56:13,092 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:56:13,092 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 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 23:56:13,093 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 23:56:13,093 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:56:13,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:56:13,093 INFO L82 PathProgramCache]: Analyzing trace with hash -348871551, now seen corresponding path program 12 times [2020-10-13 23:56:13,093 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:56:13,093 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1667363827] [2020-10-13 23:56:13,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:56:13,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:56:13,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:13,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:13,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:13,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:13,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:13,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:13,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:13,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:14,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:14,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:14,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:14,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:14,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:14,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:14,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:14,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:15,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:15,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:15,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:15,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:15,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:15,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:16,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:16,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:16,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:16,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:16,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:16,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:16,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:17,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:17,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:17,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:17,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:18,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:18,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:18,127 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:56:18,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-13 23:56:18,128 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 35 [2020-10-13 23:56:18,128 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-13 23:56:18,128 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:56:18,128 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:56:18,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 23:56:18,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:56:18,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-13 23:56:18,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:56:18,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:56:18,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:56:18,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:18,272 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:56:18,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:56:18,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:56:18,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:56:18,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:56:18,274 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:56:18,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:56:18,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:56:18,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:56:18,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:56:18,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:56:18,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:56:18,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:18,279 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:56:18,279 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:56:18,279 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:56:18,280 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:56:18,280 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:56:18,280 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:56:18,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:56:18,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:56:18,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:56:18,281 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:56:18,290 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-10-13 23:56:18,291 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1667363827] [2020-10-13 23:56:18,293 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:56:18,293 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 23:56:18,293 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079753630] [2020-10-13 23:56:18,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 23:56:18,296 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:56:18,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 23:56:18,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:56:18,297 INFO L87 Difference]: Start difference. First operand 57 states and 62 transitions. Second operand 14 states. [2020-10-13 23:56:18,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:56:18,901 INFO L93 Difference]: Finished difference Result 72 states and 78 transitions. [2020-10-13 23:56:18,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 23:56:18,902 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 56 [2020-10-13 23:56:18,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:56:18,903 INFO L225 Difference]: With dead ends: 72 [2020-10-13 23:56:18,903 INFO L226 Difference]: Without dead ends: 66 [2020-10-13 23:56:18,904 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 23:56:18,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-13 23:56:18,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 59. [2020-10-13 23:56:18,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-13 23:56:18,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 64 transitions. [2020-10-13 23:56:18,919 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 64 transitions. Word has length 56 [2020-10-13 23:56:18,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:56:18,919 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 64 transitions. [2020-10-13 23:56:18,919 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 23:56:18,920 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 64 transitions. [2020-10-13 23:56:18,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-13 23:56:18,921 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:56:18,921 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 23:56:18,921 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 23:56:18,921 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:56:18,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:56:18,922 INFO L82 PathProgramCache]: Analyzing trace with hash -1189396253, now seen corresponding path program 13 times [2020-10-13 23:56:18,922 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:56:18,923 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1757771153] [2020-10-13 23:56:18,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:56:18,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:56:18,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:19,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:20,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:21,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:22,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:23,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:23,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:23,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:56:23,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-13 23:56:23,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 23:56:23,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 23:56:23,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:56:23,947 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:56:23,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-13 23:56:23,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:56:23,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-13 23:56:23,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:56:24,939 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 44 [2020-10-13 23:56:25,121 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 43 [2020-10-13 23:56:25,438 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 50 [2020-10-13 23:56:25,609 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 48 [2020-10-13 23:56:25,830 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 50 [2020-10-13 23:56:26,036 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 51 [2020-10-13 23:56:26,268 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 56 [2020-10-13 23:56:26,426 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 47 [2020-10-13 23:56:26,627 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 49 [2020-10-13 23:56:26,864 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 57 [2020-10-13 23:56:27,148 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 63 [2020-10-13 23:56:27,344 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 53 [2020-10-13 23:56:27,559 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 51 [2020-10-13 23:56:27,907 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 54 [2020-10-13 23:56:29,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:56:29,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:56:29,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:29,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:56:29,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:56:29,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:56:29,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:56:29,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:56:29,603 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:56:29,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:56:29,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:56:29,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:56:29,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:56:29,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:56:29,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:56:29,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:29,606 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:56:29,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:56:29,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:56:29,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:56:29,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:56:29,607 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:56:29,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:56:29,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:56:29,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:56:29,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:56:29,637 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 23:56:29,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1757771153] [2020-10-13 23:56:29,638 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:56:29,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-13 23:56:29,639 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019230259] [2020-10-13 23:56:29,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-13 23:56:29,639 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:56:29,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-13 23:56:29,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1530, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 23:56:29,640 INFO L87 Difference]: Start difference. First operand 59 states and 64 transitions. Second operand 41 states. [2020-10-13 23:56:30,572 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 80 [2020-10-13 23:56:30,953 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 75 [2020-10-13 23:56:31,339 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 80 [2020-10-13 23:56:31,610 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 67 [2020-10-13 23:56:31,885 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 71 [2020-10-13 23:56:32,769 WARN L193 SmtUtils]: Spent 671.00 ms on a formula simplification. DAG size of input: 208 DAG size of output: 130 [2020-10-13 23:56:32,983 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 48 [2020-10-13 23:56:33,221 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 49 [2020-10-13 23:56:33,490 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 61 [2020-10-13 23:56:33,770 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 48 [2020-10-13 23:56:34,072 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 49 [2020-10-13 23:56:34,367 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 51 [2020-10-13 23:56:34,683 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 56 [2020-10-13 23:56:35,024 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 57 [2020-10-13 23:56:35,496 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 79 [2020-10-13 23:56:36,023 WARN L193 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 90 [2020-10-13 23:56:36,419 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 69 [2020-10-13 23:56:36,865 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 88 [2020-10-13 23:56:37,255 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 68 [2020-10-13 23:56:37,529 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 59 [2020-10-13 23:56:38,050 WARN L193 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 86 [2020-10-13 23:56:38,491 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 71 [2020-10-13 23:56:38,777 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 56 [2020-10-13 23:56:39,177 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 86 [2020-10-13 23:56:39,423 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2020-10-13 23:56:39,703 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 60 [2020-10-13 23:56:40,192 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 53 [2020-10-13 23:56:41,155 WARN L193 SmtUtils]: Spent 757.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 136 [2020-10-13 23:56:41,718 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 85 [2020-10-13 23:56:42,003 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 57 [2020-10-13 23:56:42,282 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 54 [2020-10-13 23:56:43,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:56:43,644 INFO L93 Difference]: Finished difference Result 99 states and 110 transitions. [2020-10-13 23:56:43,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-13 23:56:43,644 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 58 [2020-10-13 23:56:43,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:56:43,646 INFO L225 Difference]: With dead ends: 99 [2020-10-13 23:56:43,646 INFO L226 Difference]: Without dead ends: 93 [2020-10-13 23:56:43,648 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1358 ImplicationChecksByTransitivity, 17.2s TimeCoverageRelationStatistics Valid=718, Invalid=5924, Unknown=0, NotChecked=0, Total=6642 [2020-10-13 23:56:43,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-13 23:56:43,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 70. [2020-10-13 23:56:43,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-13 23:56:43,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 78 transitions. [2020-10-13 23:56:43,665 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 78 transitions. Word has length 58 [2020-10-13 23:56:43,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:56:43,666 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 78 transitions. [2020-10-13 23:56:43,666 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-13 23:56:43,666 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 78 transitions. [2020-10-13 23:56:43,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-13 23:56:43,667 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:56:43,667 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 23:56:43,667 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 23:56:43,667 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:56:43,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:56:43,668 INFO L82 PathProgramCache]: Analyzing trace with hash -1127356639, now seen corresponding path program 6 times [2020-10-13 23:56:43,668 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:56:43,668 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1136445326] [2020-10-13 23:56:43,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:56:43,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:56:43,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:43,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:43,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:44,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:44,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:45,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:45,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:45,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:45,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:45,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:45,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:46,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:46,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:46,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:47,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:47,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:47,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:48,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:56:48,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-13 23:56:48,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-13 23:56:48,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 23:56:48,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:56:48,686 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:56:48,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 23:56:48,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-13 23:56:48,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 23:56:48,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:56:48,955 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 37 [2020-10-13 23:56:49,110 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 42 [2020-10-13 23:56:49,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:56:49,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:56:49,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:49,519 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:56:49,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:56:49,519 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:56:49,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:56:49,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:56:49,519 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:56:49,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:56:49,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:56:49,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:56:49,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:56:49,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:56:49,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:56:49,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:49,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:56:49,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:56:49,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:56:49,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:56:49,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:56:49,523 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:56:49,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:56:49,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:56:49,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:56:49,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:56:49,531 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 23:56:49,531 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1136445326] [2020-10-13 23:56:49,532 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:56:49,532 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 23:56:49,532 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341908415] [2020-10-13 23:56:49,532 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 23:56:49,532 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:56:49,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 23:56:49,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:56:49,533 INFO L87 Difference]: Start difference. First operand 70 states and 78 transitions. Second operand 18 states. [2020-10-13 23:56:50,269 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2020-10-13 23:56:50,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:56:50,818 INFO L93 Difference]: Finished difference Result 103 states and 115 transitions. [2020-10-13 23:56:50,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 23:56:50,821 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 58 [2020-10-13 23:56:50,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:56:50,822 INFO L225 Difference]: With dead ends: 103 [2020-10-13 23:56:50,822 INFO L226 Difference]: Without dead ends: 85 [2020-10-13 23:56:50,823 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=152, Invalid=718, Unknown=0, NotChecked=0, Total=870 [2020-10-13 23:56:50,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-13 23:56:50,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 73. [2020-10-13 23:56:50,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-13 23:56:50,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 82 transitions. [2020-10-13 23:56:50,836 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 82 transitions. Word has length 58 [2020-10-13 23:56:50,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:56:50,836 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 82 transitions. [2020-10-13 23:56:50,836 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 23:56:50,836 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 82 transitions. [2020-10-13 23:56:50,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-13 23:56:50,837 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:56:50,837 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 23:56:50,837 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 23:56:50,837 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:56:50,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:56:50,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1479783227, now seen corresponding path program 14 times [2020-10-13 23:56:50,838 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:56:50,838 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1501250004] [2020-10-13 23:56:50,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:56:50,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:56:50,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:50,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:53,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:56:53,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-13 23:56:53,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:56:53,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2930 [2020-10-13 23:56:53,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:56:53,780 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:56:53,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 23:56:53,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:56:53,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-13 23:56:53,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:56:53,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:56:53,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:56:53,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:53,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:56:53,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:56:53,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:56:53,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:56:53,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:56:53,945 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:56:53,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:56:53,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:56:53,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:56:53,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:56:53,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:56:53,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:56:53,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:53,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:56:53,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:56:53,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:56:53,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:56:53,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:56:53,949 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:56:53,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:56:53,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:56:53,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:56:53,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:56:53,955 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 23:56:53,955 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1501250004] [2020-10-13 23:56:53,955 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:56:53,956 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 23:56:53,956 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865543649] [2020-10-13 23:56:53,956 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 23:56:53,956 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:56:53,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 23:56:53,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:56:53,957 INFO L87 Difference]: Start difference. First operand 73 states and 82 transitions. Second operand 16 states. [2020-10-13 23:56:54,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:56:54,512 INFO L93 Difference]: Finished difference Result 159 states and 181 transitions. [2020-10-13 23:56:54,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 23:56:54,513 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 60 [2020-10-13 23:56:54,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:56:54,514 INFO L225 Difference]: With dead ends: 159 [2020-10-13 23:56:54,514 INFO L226 Difference]: Without dead ends: 94 [2020-10-13 23:56:54,516 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 23:56:54,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-13 23:56:54,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 64. [2020-10-13 23:56:54,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-13 23:56:54,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 70 transitions. [2020-10-13 23:56:54,528 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 70 transitions. Word has length 60 [2020-10-13 23:56:54,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:56:54,528 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 70 transitions. [2020-10-13 23:56:54,528 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 23:56:54,528 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 70 transitions. [2020-10-13 23:56:54,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-13 23:56:54,529 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:56:54,529 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 23:56:54,529 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 23:56:54,530 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:56:54,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:56:54,530 INFO L82 PathProgramCache]: Analyzing trace with hash -1262096657, now seen corresponding path program 15 times [2020-10-13 23:56:54,530 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:56:54,530 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [844023984] [2020-10-13 23:56:54,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:56:54,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:56:54,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:54,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:54,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:54,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:54,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:55,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:55,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:56,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:59,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:59,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:59,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:59,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:59,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:56:59,551 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-13 23:56:59,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 23:56:59,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 23:56:59,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:56:59,553 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:56:59,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 23:56:59,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:56:59,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-13 23:56:59,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:56:59,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:56:59,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:56:59,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:59,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:56:59,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:56:59,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:56:59,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:56:59,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:56:59,791 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:56:59,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:56:59,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:56:59,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:56:59,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:56:59,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:56:59,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:56:59,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:56:59,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:56:59,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:56:59,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:56:59,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:56:59,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:56:59,797 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:56:59,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:56:59,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:56:59,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:56:59,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:56:59,804 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 23:56:59,807 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [844023984] [2020-10-13 23:56:59,812 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:56:59,812 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 23:56:59,813 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997824757] [2020-10-13 23:56:59,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 23:56:59,814 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:56:59,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 23:56:59,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:56:59,815 INFO L87 Difference]: Start difference. First operand 64 states and 70 transitions. Second operand 16 states. [2020-10-13 23:57:00,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:57:00,553 INFO L93 Difference]: Finished difference Result 79 states and 86 transitions. [2020-10-13 23:57:00,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 23:57:00,554 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 63 [2020-10-13 23:57:00,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:57:00,555 INFO L225 Difference]: With dead ends: 79 [2020-10-13 23:57:00,555 INFO L226 Difference]: Without dead ends: 73 [2020-10-13 23:57:00,556 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=169, Invalid=643, Unknown=0, NotChecked=0, Total=812 [2020-10-13 23:57:00,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-13 23:57:00,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 66. [2020-10-13 23:57:00,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-13 23:57:00,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 72 transitions. [2020-10-13 23:57:00,567 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 72 transitions. Word has length 63 [2020-10-13 23:57:00,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:57:00,567 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 72 transitions. [2020-10-13 23:57:00,568 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 23:57:00,568 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 72 transitions. [2020-10-13 23:57:00,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-13 23:57:00,569 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:57:00,569 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 23:57:00,569 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 23:57:00,569 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:57:00,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:57:00,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1669572561, now seen corresponding path program 16 times [2020-10-13 23:57:00,570 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:57:00,570 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [36358892] [2020-10-13 23:57:00,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:57:00,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:57:00,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:01,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:02,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:03,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:03,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:04,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:05,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:57:05,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-13 23:57:05,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:57:05,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 23:57:05,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:57:05,593 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:57:05,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-13 23:57:05,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:57:05,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-13 23:57:05,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:57:06,491 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 34 [2020-10-13 23:57:06,828 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2020-10-13 23:57:07,015 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 48 [2020-10-13 23:57:07,182 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 48 [2020-10-13 23:57:07,369 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 49 [2020-10-13 23:57:07,566 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 49 [2020-10-13 23:57:07,863 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 58 [2020-10-13 23:57:08,126 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 60 [2020-10-13 23:57:08,437 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 61 [2020-10-13 23:57:08,676 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 58 [2020-10-13 23:57:08,969 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 61 [2020-10-13 23:57:09,209 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 55 [2020-10-13 23:57:09,518 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 65 [2020-10-13 23:57:09,773 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 58 [2020-10-13 23:57:10,069 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 65 [2020-10-13 23:57:10,306 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 59 [2020-10-13 23:57:10,501 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2020-10-13 23:57:12,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:57:12,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:57:12,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:12,857 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:57:12,857 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:57:12,857 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:57:12,857 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:57:12,858 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:57:12,858 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:57:12,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:57:12,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:57:12,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:57:12,858 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:57:12,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:57:12,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:57:12,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:12,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:57:12,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:57:12,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:57:12,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:57:12,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:57:12,862 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:57:12,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:57:12,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:57:12,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:57:12,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:57:12,907 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 6 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:57:12,908 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [36358892] [2020-10-13 23:57:12,908 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:57:12,908 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-13 23:57:12,908 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215564336] [2020-10-13 23:57:12,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-13 23:57:12,909 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:57:12,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-13 23:57:12,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1714, Unknown=0, NotChecked=0, Total=1892 [2020-10-13 23:57:12,910 INFO L87 Difference]: Start difference. First operand 66 states and 72 transitions. Second operand 44 states. [2020-10-13 23:57:13,839 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 83 [2020-10-13 23:57:15,549 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 77 [2020-10-13 23:57:16,719 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 95 [2020-10-13 23:57:17,736 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2020-10-13 23:57:19,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:57:19,907 INFO L93 Difference]: Finished difference Result 144 states and 167 transitions. [2020-10-13 23:57:19,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-13 23:57:19,909 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 65 [2020-10-13 23:57:19,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:57:19,910 INFO L225 Difference]: With dead ends: 144 [2020-10-13 23:57:19,910 INFO L226 Difference]: Without dead ends: 123 [2020-10-13 23:57:19,913 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1232 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=467, Invalid=4503, Unknown=0, NotChecked=0, Total=4970 [2020-10-13 23:57:19,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-13 23:57:19,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 80. [2020-10-13 23:57:19,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-13 23:57:19,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 89 transitions. [2020-10-13 23:57:19,928 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 89 transitions. Word has length 65 [2020-10-13 23:57:19,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:57:19,928 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 89 transitions. [2020-10-13 23:57:19,928 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-13 23:57:19,929 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 89 transitions. [2020-10-13 23:57:19,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-13 23:57:19,929 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:57:19,929 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 23:57:19,930 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 23:57:19,930 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:57:19,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:57:19,930 INFO L82 PathProgramCache]: Analyzing trace with hash 1160099471, now seen corresponding path program 7 times [2020-10-13 23:57:19,930 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:57:19,931 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1981142605] [2020-10-13 23:57:19,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:57:19,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:57:19,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:20,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:20,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:20,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:20,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:20,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:20,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:20,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:21,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:22,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:22,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:22,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:22,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:22,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:23,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:23,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:23,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:23,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:23,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:23,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:23,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:24,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:24,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:24,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:24,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:57:24,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-13 23:57:24,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 24 [2020-10-13 23:57:24,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 23:57:24,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:57:24,955 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:57:24,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 23:57:24,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-13 23:57:24,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-13 23:57:24,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:57:25,409 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 30 [2020-10-13 23:57:25,673 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 33 [2020-10-13 23:57:25,941 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 43 [2020-10-13 23:57:26,136 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 39 [2020-10-13 23:57:26,421 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 50 [2020-10-13 23:57:26,754 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2020-10-13 23:57:27,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:57:27,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:57:27,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:27,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:57:27,444 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:57:27,444 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:57:27,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:57:27,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:57:27,444 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:57:27,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:57:27,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:57:27,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:57:27,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:57:27,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:57:27,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:57:27,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:27,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:57:27,447 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:57:27,447 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:57:27,447 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:57:27,447 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:57:27,448 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:57:27,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:57:27,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:57:27,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:57:27,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:57:27,463 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 23:57:27,463 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1981142605] [2020-10-13 23:57:27,464 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:57:27,464 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 23:57:27,464 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388153488] [2020-10-13 23:57:27,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 23:57:27,464 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:57:27,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 23:57:27,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2020-10-13 23:57:27,465 INFO L87 Difference]: Start difference. First operand 80 states and 89 transitions. Second operand 24 states. [2020-10-13 23:57:28,302 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 56 [2020-10-13 23:57:28,612 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 56 [2020-10-13 23:57:29,010 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 67 [2020-10-13 23:57:29,378 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 88 [2020-10-13 23:57:29,578 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 65 [2020-10-13 23:57:30,030 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 78 [2020-10-13 23:57:30,791 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 56 [2020-10-13 23:57:30,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:57:30,961 INFO L93 Difference]: Finished difference Result 121 states and 136 transitions. [2020-10-13 23:57:30,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 23:57:30,962 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 65 [2020-10-13 23:57:30,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:57:30,963 INFO L225 Difference]: With dead ends: 121 [2020-10-13 23:57:30,963 INFO L226 Difference]: Without dead ends: 101 [2020-10-13 23:57:30,965 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=206, Invalid=1434, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 23:57:30,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-13 23:57:30,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 83. [2020-10-13 23:57:30,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-13 23:57:30,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 93 transitions. [2020-10-13 23:57:30,982 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 93 transitions. Word has length 65 [2020-10-13 23:57:30,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:57:30,983 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 93 transitions. [2020-10-13 23:57:30,983 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 23:57:30,983 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 93 transitions. [2020-10-13 23:57:30,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-13 23:57:30,983 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:57:30,984 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 23:57:30,984 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 23:57:30,984 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:57:30,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:57:30,984 INFO L82 PathProgramCache]: Analyzing trace with hash -1923794861, now seen corresponding path program 8 times [2020-10-13 23:57:30,985 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:57:30,985 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1517532435] [2020-10-13 23:57:30,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:57:30,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:57:31,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:31,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:31,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:31,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:31,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:34,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:35,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:35,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:35,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:35,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:35,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:57:35,998 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-13 23:57:35,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 23:57:35,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 23:57:35,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:57:35,998 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:57:35,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 23:57:35,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:57:35,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 23:57:35,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:57:36,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:57:36,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:57:36,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:36,186 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:57:36,186 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:57:36,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:57:36,186 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:57:36,186 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:57:36,187 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:57:36,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:57:36,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:57:36,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:57:36,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-13 23:57:36,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:57:36,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:57:36,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:36,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:57:36,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:57:36,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:57:36,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:57:36,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:57:36,197 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:57:36,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:57:36,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:57:36,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:57:36,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:57:36,205 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 23:57:36,205 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1517532435] [2020-10-13 23:57:36,205 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:57:36,205 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 23:57:36,206 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117024067] [2020-10-13 23:57:36,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 23:57:36,206 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:57:36,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 23:57:36,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-13 23:57:36,207 INFO L87 Difference]: Start difference. First operand 83 states and 93 transitions. Second operand 11 states. [2020-10-13 23:57:36,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:57:36,725 INFO L93 Difference]: Finished difference Result 114 states and 128 transitions. [2020-10-13 23:57:36,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 23:57:36,726 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 65 [2020-10-13 23:57:36,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:57:36,727 INFO L225 Difference]: With dead ends: 114 [2020-10-13 23:57:36,727 INFO L226 Difference]: Without dead ends: 83 [2020-10-13 23:57:36,728 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 23:57:36,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-13 23:57:36,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2020-10-13 23:57:36,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-13 23:57:36,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 91 transitions. [2020-10-13 23:57:36,742 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 91 transitions. Word has length 65 [2020-10-13 23:57:36,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:57:36,742 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 91 transitions. [2020-10-13 23:57:36,742 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 23:57:36,742 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 91 transitions. [2020-10-13 23:57:36,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-13 23:57:36,742 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:57:36,743 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 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 23:57:36,743 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 23:57:36,743 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:57:36,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:57:36,743 INFO L82 PathProgramCache]: Analyzing trace with hash 1322403795, now seen corresponding path program 17 times [2020-10-13 23:57:36,743 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:57:36,744 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [416416946] [2020-10-13 23:57:36,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:57:36,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:57:36,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:36,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:39,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:40,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:40,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:41,772 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:57:41,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-13 23:57:41,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:57:41,773 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-13 23:57:41,773 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:57:41,773 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:57:41,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 23:57:41,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:57:41,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-13 23:57:41,774 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:57:42,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:57:42,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:57:42,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:42,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:57:42,004 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:57:42,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:57:42,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:57:42,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:57:42,005 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:57:42,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:57:42,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:57:42,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:57:42,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:57:42,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:57:42,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:57:42,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:42,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:57:42,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:57:42,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:57:42,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:57:42,008 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:57:42,008 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:57:42,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:57:42,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:57:42,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:57:42,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:57:42,013 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 25 proven. 60 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-10-13 23:57:42,013 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [416416946] [2020-10-13 23:57:42,013 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:57:42,013 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 23:57:42,013 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8361323] [2020-10-13 23:57:42,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 23:57:42,014 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:57:42,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 23:57:42,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:57:42,014 INFO L87 Difference]: Start difference. First operand 83 states and 91 transitions. Second operand 18 states. [2020-10-13 23:57:43,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:57:43,143 INFO L93 Difference]: Finished difference Result 130 states and 145 transitions. [2020-10-13 23:57:43,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 23:57:43,144 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 67 [2020-10-13 23:57:43,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:57:43,146 INFO L225 Difference]: With dead ends: 130 [2020-10-13 23:57:43,146 INFO L226 Difference]: Without dead ends: 110 [2020-10-13 23:57:43,147 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=210, Invalid=782, Unknown=0, NotChecked=0, Total=992 [2020-10-13 23:57:43,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-13 23:57:43,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 71. [2020-10-13 23:57:43,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-13 23:57:43,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 77 transitions. [2020-10-13 23:57:43,160 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 77 transitions. Word has length 67 [2020-10-13 23:57:43,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:57:43,160 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 77 transitions. [2020-10-13 23:57:43,160 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 23:57:43,160 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 77 transitions. [2020-10-13 23:57:43,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-13 23:57:43,161 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:57:43,161 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 23:57:43,161 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 23:57:43,161 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:57:43,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:57:43,161 INFO L82 PathProgramCache]: Analyzing trace with hash -896811867, now seen corresponding path program 18 times [2020-10-13 23:57:43,162 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:57:43,162 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [759636256] [2020-10-13 23:57:43,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:57:43,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:57:43,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:43,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:43,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:43,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:43,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:43,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:43,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:43,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:43,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:43,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:43,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:48,176 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:57:48,176 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-13 23:57:48,176 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 23:57:48,176 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 23:57:48,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:57:48,177 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:57:48,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 23:57:48,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:57:48,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-13 23:57:48,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:57:48,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:57:48,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:57:48,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:48,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:57:48,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:57:48,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:57:48,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:57:48,390 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:57:48,391 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:57:48,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:57:48,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:57:48,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:57:48,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:57:48,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:57:48,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:57:48,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:48,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:57:48,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:57:48,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:57:48,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:57:48,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:57:48,394 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:57:48,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:57:48,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:57:48,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:57:48,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:57:48,399 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 23:57:48,399 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [759636256] [2020-10-13 23:57:48,399 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:57:48,400 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 23:57:48,400 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039009219] [2020-10-13 23:57:48,400 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 23:57:48,400 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:57:48,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 23:57:48,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:57:48,401 INFO L87 Difference]: Start difference. First operand 71 states and 77 transitions. Second operand 18 states. [2020-10-13 23:57:48,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:57:48,972 INFO L93 Difference]: Finished difference Result 139 states and 155 transitions. [2020-10-13 23:57:48,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 23:57:48,974 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 70 [2020-10-13 23:57:48,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:57:48,975 INFO L225 Difference]: With dead ends: 139 [2020-10-13 23:57:48,975 INFO L226 Difference]: Without dead ends: 87 [2020-10-13 23:57:48,976 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 23:57:48,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-13 23:57:48,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 73. [2020-10-13 23:57:48,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-13 23:57:48,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 79 transitions. [2020-10-13 23:57:48,988 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 79 transitions. Word has length 70 [2020-10-13 23:57:48,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:57:48,988 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 79 transitions. [2020-10-13 23:57:48,988 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 23:57:48,988 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 79 transitions. [2020-10-13 23:57:48,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-13 23:57:48,989 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:57:48,989 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 23:57:48,989 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 23:57:48,989 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:57:48,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:57:48,990 INFO L82 PathProgramCache]: Analyzing trace with hash -892678685, now seen corresponding path program 19 times [2020-10-13 23:57:48,990 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:57:48,990 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1501451697] [2020-10-13 23:57:48,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:57:49,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:57:49,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:50,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:52,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:57:54,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:57:54,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-13 23:57:54,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:57:54,011 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 23:57:54,011 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:57:54,011 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:57:54,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 51 [2020-10-13 23:57:54,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:57:54,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-13 23:57:54,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:57:55,418 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 49 [2020-10-13 23:57:55,612 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 47 [2020-10-13 23:57:56,000 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 50 [2020-10-13 23:57:56,210 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 52 [2020-10-13 23:57:56,397 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2020-10-13 23:57:56,778 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 54 [2020-10-13 23:57:57,135 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 56 [2020-10-13 23:57:57,447 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 62 [2020-10-13 23:57:57,681 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2020-10-13 23:57:58,076 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 59 [2020-10-13 23:57:58,356 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 51 [2020-10-13 23:57:58,666 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 56 [2020-10-13 23:57:59,016 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 63 [2020-10-13 23:57:59,287 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 51 [2020-10-13 23:57:59,555 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 51 [2020-10-13 23:58:02,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:58:02,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:58:02,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:02,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:58:02,384 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:58:02,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:58:02,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:58:02,385 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:58:02,385 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:58:02,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:58:02,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:58:02,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:58:02,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:58:02,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:58:02,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:58:02,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:02,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:58:02,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:58:02,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:58:02,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:58:02,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:58:02,388 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:58:02,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:58:02,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:58:02,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:58:02,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:58:02,441 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 23:58:02,441 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1501451697] [2020-10-13 23:58:02,441 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:58:02,442 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-13 23:58:02,442 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296128471] [2020-10-13 23:58:02,442 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-13 23:58:02,442 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:58:02,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-13 23:58:02,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=2565, Unknown=0, NotChecked=0, Total=2756 [2020-10-13 23:58:02,443 INFO L87 Difference]: Start difference. First operand 73 states and 79 transitions. Second operand 53 states. [2020-10-13 23:58:03,195 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2020-10-13 23:58:04,515 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 38 [2020-10-13 23:58:04,896 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 43 [2020-10-13 23:58:05,262 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 47 [2020-10-13 23:58:05,968 WARN L193 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 71 [2020-10-13 23:58:07,430 WARN L193 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 50 [2020-10-13 23:58:08,122 WARN L193 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 50 [2020-10-13 23:58:08,724 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 53 [2020-10-13 23:58:09,142 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 13 [2020-10-13 23:58:09,523 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 60 [2020-10-13 23:58:10,190 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 58 [2020-10-13 23:58:10,518 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 56 [2020-10-13 23:58:10,903 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 61 [2020-10-13 23:58:11,211 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 53 [2020-10-13 23:58:11,590 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-10-13 23:58:11,910 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-10-13 23:58:12,510 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 54 [2020-10-13 23:58:13,022 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 66 [2020-10-13 23:58:13,362 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 63 [2020-10-13 23:58:13,811 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 64 [2020-10-13 23:58:16,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:58:16,756 INFO L93 Difference]: Finished difference Result 139 states and 155 transitions. [2020-10-13 23:58:16,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-10-13 23:58:16,757 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 72 [2020-10-13 23:58:16,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:58:16,759 INFO L225 Difference]: With dead ends: 139 [2020-10-13 23:58:16,759 INFO L226 Difference]: Without dead ends: 133 [2020-10-13 23:58:16,762 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1490 ImplicationChecksByTransitivity, 17.6s TimeCoverageRelationStatistics Valid=661, Invalid=6995, Unknown=0, NotChecked=0, Total=7656 [2020-10-13 23:58:16,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-13 23:58:16,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 101. [2020-10-13 23:58:16,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-13 23:58:16,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 113 transitions. [2020-10-13 23:58:16,783 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 113 transitions. Word has length 72 [2020-10-13 23:58:16,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:58:16,783 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 113 transitions. [2020-10-13 23:58:16,783 INFO L480 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-13 23:58:16,783 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 113 transitions. [2020-10-13 23:58:16,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-13 23:58:16,784 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:58:16,784 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:58:16,784 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 23:58:16,784 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:58:16,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:58:16,785 INFO L82 PathProgramCache]: Analyzing trace with hash -870046431, now seen corresponding path program 9 times [2020-10-13 23:58:16,785 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:58:16,785 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1682966659] [2020-10-13 23:58:16,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:58:16,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:58:16,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:16,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:17,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:17,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:17,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:17,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:17,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:18,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:18,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:18,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:18,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:20,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:20,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:20,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:20,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:20,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:21,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:21,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:21,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:21,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:58:21,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-13 23:58:21,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-13 23:58:21,859 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5052 [2020-10-13 23:58:21,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:58:21,860 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:58:21,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 23:58:21,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:58:21,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-13 23:58:21,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:58:22,475 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 41 [2020-10-13 23:58:22,747 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 41 [2020-10-13 23:58:23,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:58:23,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:58:23,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:23,504 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:58:23,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:58:23,504 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:58:23,504 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:58:23,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:58:23,505 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:58:23,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:58:23,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:58:23,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:58:23,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:58:23,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:58:23,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:58:23,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:23,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:58:23,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:58:23,508 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:58:23,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:58:23,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:58:23,509 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:58:23,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:58:23,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:58:23,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:58:23,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:58:23,523 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 36 proven. 83 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-13 23:58:23,523 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1682966659] [2020-10-13 23:58:23,523 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:58:23,524 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 23:58:23,524 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967640252] [2020-10-13 23:58:23,524 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 23:58:23,524 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:58:23,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 23:58:23,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=523, Unknown=0, NotChecked=0, Total=650 [2020-10-13 23:58:23,525 INFO L87 Difference]: Start difference. First operand 101 states and 113 transitions. Second operand 26 states. [2020-10-13 23:58:24,733 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 61 [2020-10-13 23:58:25,343 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 38 [2020-10-13 23:58:26,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:58:26,935 INFO L93 Difference]: Finished difference Result 158 states and 178 transitions. [2020-10-13 23:58:26,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-13 23:58:26,937 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 72 [2020-10-13 23:58:26,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:58:26,938 INFO L225 Difference]: With dead ends: 158 [2020-10-13 23:58:26,938 INFO L226 Difference]: Without dead ends: 136 [2020-10-13 23:58:26,939 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 849 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=702, Invalid=2490, Unknown=0, NotChecked=0, Total=3192 [2020-10-13 23:58:26,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-13 23:58:26,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 110. [2020-10-13 23:58:26,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-13 23:58:26,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 125 transitions. [2020-10-13 23:58:26,966 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 125 transitions. Word has length 72 [2020-10-13 23:58:26,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:58:26,966 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 125 transitions. [2020-10-13 23:58:26,966 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 23:58:26,966 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 125 transitions. [2020-10-13 23:58:26,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-13 23:58:26,967 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:58:26,967 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:58:26,968 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-13 23:58:26,968 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:58:26,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:58:26,968 INFO L82 PathProgramCache]: Analyzing trace with hash -965065243, now seen corresponding path program 10 times [2020-10-13 23:58:26,968 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:58:26,969 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [996629927] [2020-10-13 23:58:26,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:58:26,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:58:27,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:27,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:27,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:27,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:31,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:31,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:31,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:31,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:58:31,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-13 23:58:31,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 23:58:31,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 23:58:31,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:58:31,991 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:58:31,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 23:58:31,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-13 23:58:31,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 23:58:31,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:58:32,860 WARN L193 SmtUtils]: Spent 467.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 41 [2020-10-13 23:58:33,360 WARN L193 SmtUtils]: Spent 457.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 43 [2020-10-13 23:58:33,892 WARN L193 SmtUtils]: Spent 420.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 43 [2020-10-13 23:58:34,048 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 24 [2020-10-13 23:58:34,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:58:34,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:58:34,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:34,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:58:34,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:58:34,602 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:58:34,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:58:34,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:58:34,603 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:58:34,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:58:34,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:58:34,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:58:34,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:58:34,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 23:58:34,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:58:34,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:34,606 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:58:34,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 23:58:34,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:58:34,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 23:58:34,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:58:34,607 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:58:34,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:58:34,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:58:34,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:58:34,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:58:34,621 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 34 proven. 76 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2020-10-13 23:58:34,621 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [996629927] [2020-10-13 23:58:34,621 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:58:34,622 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 23:58:34,622 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222988293] [2020-10-13 23:58:34,622 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 23:58:34,622 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:58:34,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 23:58:34,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2020-10-13 23:58:34,623 INFO L87 Difference]: Start difference. First operand 110 states and 125 transitions. Second operand 22 states. [2020-10-13 23:58:35,674 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 34 [2020-10-13 23:58:35,979 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 65 [2020-10-13 23:58:36,245 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2020-10-13 23:58:37,103 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 48 [2020-10-13 23:58:37,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:58:37,285 INFO L93 Difference]: Finished difference Result 165 states and 188 transitions. [2020-10-13 23:58:37,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-13 23:58:37,287 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 72 [2020-10-13 23:58:37,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:58:37,288 INFO L225 Difference]: With dead ends: 165 [2020-10-13 23:58:37,289 INFO L226 Difference]: Without dead ends: 143 [2020-10-13 23:58:37,290 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=224, Invalid=1182, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 23:58:37,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-13 23:58:37,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 113. [2020-10-13 23:58:37,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-13 23:58:37,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 129 transitions. [2020-10-13 23:58:37,322 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 129 transitions. Word has length 72 [2020-10-13 23:58:37,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:58:37,323 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 129 transitions. [2020-10-13 23:58:37,323 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 23:58:37,323 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 129 transitions. [2020-10-13 23:58:37,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-13 23:58:37,324 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:58:37,324 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 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 23:58:37,324 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-13 23:58:37,324 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:58:37,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:58:37,325 INFO L82 PathProgramCache]: Analyzing trace with hash 197958085, now seen corresponding path program 20 times [2020-10-13 23:58:37,325 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:58:37,325 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1934521512] [2020-10-13 23:58:37,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:58:37,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:58:37,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:58:37,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking...