/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-lopstr16/partial_lesser_bound-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 00:01:07,311 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 00:01:07,314 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 00:01:07,339 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 00:01:07,340 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 00:01:07,341 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 00:01:07,342 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 00:01:07,344 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 00:01:07,345 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 00:01:07,346 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 00:01:07,347 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 00:01:07,348 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 00:01:07,348 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 00:01:07,349 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 00:01:07,350 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 00:01:07,351 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 00:01:07,352 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 00:01:07,353 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 00:01:07,354 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 00:01:07,356 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 00:01:07,358 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 00:01:07,359 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 00:01:07,360 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 00:01:07,361 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 00:01:07,363 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 00:01:07,363 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 00:01:07,363 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 00:01:07,364 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 00:01:07,365 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 00:01:07,366 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 00:01:07,366 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 00:01:07,367 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 00:01:07,367 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 00:01:07,368 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 00:01:07,369 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 00:01:07,370 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 00:01:07,370 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 00:01:07,370 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 00:01:07,371 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 00:01:07,371 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 00:01:07,372 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 00:01:07,373 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-14 00:01:07,405 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 00:01:07,405 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 00:01:07,406 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 00:01:07,407 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 00:01:07,407 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 00:01:07,407 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 00:01:07,407 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 00:01:07,408 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 00:01:07,408 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 00:01:07,416 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 00:01:07,416 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 00:01:07,417 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 00:01:07,417 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 00:01:07,417 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 00:01:07,417 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 00:01:07,417 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 00:01:07,418 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 00:01:07,418 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 00:01:07,418 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 00:01:07,418 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 00:01:07,418 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 00:01:07,419 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 00:01:07,419 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 00:01:07,419 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 00:01:07,419 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 00:01:07,419 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 00:01:07,419 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 00:01:07,420 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 00:01:07,420 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 00:01:07,421 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; [2020-10-14 00:01:07,707 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 00:01:07,719 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 00:01:07,722 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 00:01:07,724 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 00:01:07,724 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 00:01:07,725 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-lopstr16/partial_lesser_bound-1.i [2020-10-14 00:01:07,786 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/acd296de5/16f5c69a23e049b1af2a300b2b22debb/FLAG68a2f60b4 [2020-10-14 00:01:08,192 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 00:01:08,193 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-lopstr16/partial_lesser_bound-1.i [2020-10-14 00:01:08,199 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/acd296de5/16f5c69a23e049b1af2a300b2b22debb/FLAG68a2f60b4 [2020-10-14 00:01:08,617 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/acd296de5/16f5c69a23e049b1af2a300b2b22debb [2020-10-14 00:01:08,626 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 00:01:08,628 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 00:01:08,629 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 00:01:08,629 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 00:01:08,632 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 00:01:08,633 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 12:01:08" (1/1) ... [2020-10-14 00:01:08,636 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@307b9319 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 12:01:08, skipping insertion in model container [2020-10-14 00:01:08,636 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 12:01:08" (1/1) ... [2020-10-14 00:01:08,644 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 00:01:08,660 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 00:01:08,829 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 00:01:08,837 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 00:01:08,856 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 00:01:08,877 INFO L208 MainTranslator]: Completed translation [2020-10-14 00:01:08,877 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 12:01:08 WrapperNode [2020-10-14 00:01:08,877 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 00:01:08,878 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 00:01:08,878 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 00:01:08,879 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 00:01:08,980 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 12:01:08" (1/1) ... [2020-10-14 00:01:08,981 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 12:01:08" (1/1) ... [2020-10-14 00:01:08,988 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 12:01:08" (1/1) ... [2020-10-14 00:01:08,989 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 12:01:08" (1/1) ... [2020-10-14 00:01:09,001 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 12:01:08" (1/1) ... [2020-10-14 00:01:09,008 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 12:01:08" (1/1) ... [2020-10-14 00:01:09,010 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 12:01:08" (1/1) ... [2020-10-14 00:01:09,012 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 00:01:09,012 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 00:01:09,012 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 00:01:09,012 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 00:01:09,013 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 12:01:08" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 00:01:09,078 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 00:01:09,078 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 00:01:09,078 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-14 00:01:09,079 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 00:01:09,079 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 00:01:09,079 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-14 00:01:09,080 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 00:01:09,081 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-14 00:01:09,082 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-14 00:01:09,082 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 00:01:09,082 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-14 00:01:09,082 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 00:01:09,083 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-14 00:01:09,295 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 00:01:09,296 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-14 00:01:09,300 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 12:01:09 BoogieIcfgContainer [2020-10-14 00:01:09,301 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 00:01:09,302 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 00:01:09,302 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 00:01:09,306 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 00:01:09,307 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 12:01:08" (1/3) ... [2020-10-14 00:01:09,307 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@217ccf41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 12:01:09, skipping insertion in model container [2020-10-14 00:01:09,308 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 12:01:08" (2/3) ... [2020-10-14 00:01:09,308 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@217ccf41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 12:01:09, skipping insertion in model container [2020-10-14 00:01:09,308 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 12:01:09" (3/3) ... [2020-10-14 00:01:09,311 INFO L109 eAbstractionObserver]: Analyzing ICFG partial_lesser_bound-1.i [2020-10-14 00:01:09,323 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 00:01:09,332 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 00:01:09,349 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 00:01:09,380 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 00:01:09,380 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 00:01:09,380 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 00:01:09,381 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 00:01:09,381 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 00:01:09,381 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 00:01:09,381 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 00:01:09,382 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 00:01:09,416 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-10-14 00:01:09,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-14 00:01:09,427 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:01:09,428 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:01:09,429 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:01:09,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:01:09,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1778002988, now seen corresponding path program 1 times [2020-10-14 00:01:09,443 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:01:09,443 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1164387758] [2020-10-14 00:01:09,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:01:09,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:01:09,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:09,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:09,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:01:09,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-14 00:01:09,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 00:01:09,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 225 [2020-10-14 00:01:09,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:01:09,772 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:01:09,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:01:09,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 00:01:09,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:01:09,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-14 00:01:09,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:01:09,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:01:09,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:09,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:01:09,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:01:09,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:01:09,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-14 00:01:09,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:01:09,922 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:01:09,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:01:09,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:01:09,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:01:09,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-14 00:01:09,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 00:01:09,947 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1164387758] [2020-10-14 00:01:09,949 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 00:01:09,950 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-14 00:01:09,950 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377304284] [2020-10-14 00:01:09,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-14 00:01:09,955 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:01:09,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-14 00:01:09,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 00:01:09,967 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 3 states. [2020-10-14 00:01:10,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:01:10,050 INFO L93 Difference]: Finished difference Result 46 states and 57 transitions. [2020-10-14 00:01:10,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-14 00:01:10,052 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-10-14 00:01:10,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:01:10,061 INFO L225 Difference]: With dead ends: 46 [2020-10-14 00:01:10,061 INFO L226 Difference]: Without dead ends: 22 [2020-10-14 00:01:10,066 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 00:01:10,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-14 00:01:10,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-10-14 00:01:10,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-14 00:01:10,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2020-10-14 00:01:10,107 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 15 [2020-10-14 00:01:10,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:01:10,107 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2020-10-14 00:01:10,107 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-14 00:01:10,108 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2020-10-14 00:01:10,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-14 00:01:10,108 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:01:10,109 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:01:10,109 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 00:01:10,109 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:01:10,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:01:10,110 INFO L82 PathProgramCache]: Analyzing trace with hash -262172122, now seen corresponding path program 1 times [2020-10-14 00:01:10,110 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:01:10,111 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2005287508] [2020-10-14 00:01:10,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:01:10,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:01:10,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:10,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:10,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:01:10,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-14 00:01:10,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 00:01:10,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 116 [2020-10-14 00:01:10,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:01:10,241 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:01:10,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 00:01:10,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 00:01:10,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 00:01:10,242 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:01:10,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:01:10,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:01:10,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:10,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:01:10,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:01:10,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:01:10,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-14 00:01:10,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:01:10,313 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:01:10,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:01:10,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:01:10,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:01:10,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:01:10,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 00:01:10,325 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2005287508] [2020-10-14 00:01:10,326 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 00:01:10,326 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 00:01:10,326 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062666258] [2020-10-14 00:01:10,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 00:01:10,329 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:01:10,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 00:01:10,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 00:01:10,337 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 4 states. [2020-10-14 00:01:10,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:01:10,490 INFO L93 Difference]: Finished difference Result 50 states and 55 transitions. [2020-10-14 00:01:10,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 00:01:10,491 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-10-14 00:01:10,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:01:10,492 INFO L225 Difference]: With dead ends: 50 [2020-10-14 00:01:10,492 INFO L226 Difference]: Without dead ends: 36 [2020-10-14 00:01:10,493 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 00:01:10,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-14 00:01:10,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 24. [2020-10-14 00:01:10,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-14 00:01:10,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-10-14 00:01:10,501 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 15 [2020-10-14 00:01:10,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:01:10,502 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-10-14 00:01:10,502 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 00:01:10,502 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-10-14 00:01:10,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-14 00:01:10,503 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:01:10,503 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:01:10,503 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 00:01:10,504 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:01:10,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:01:10,504 INFO L82 PathProgramCache]: Analyzing trace with hash 1323409058, now seen corresponding path program 1 times [2020-10-14 00:01:10,504 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:01:10,505 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2002695533] [2020-10-14 00:01:10,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:01:10,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:01:10,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:10,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:10,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:11,148 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:01:11,149 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-14 00:01:11,149 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 00:01:11,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 633 [2020-10-14 00:01:11,150 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:01:11,150 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:01:11,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 00:01:11,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 00:01:11,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-14 00:01:11,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:01:11,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:01:11,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:01:11,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:11,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:01:11,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:01:11,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:01:11,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 00:01:11,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:01:11,200 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:01:11,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:01:11,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:01:11,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:01:11,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:01:11,207 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 00:01:11,207 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2002695533] [2020-10-14 00:01:11,208 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:01:11,208 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 00:01:11,208 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582917580] [2020-10-14 00:01:11,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 00:01:11,209 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:01:11,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 00:01:11,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-14 00:01:11,211 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 5 states. [2020-10-14 00:01:11,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:01:11,405 INFO L93 Difference]: Finished difference Result 65 states and 70 transitions. [2020-10-14 00:01:11,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 00:01:11,406 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-10-14 00:01:11,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:01:11,408 INFO L225 Difference]: With dead ends: 65 [2020-10-14 00:01:11,408 INFO L226 Difference]: Without dead ends: 50 [2020-10-14 00:01:11,409 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-14 00:01:11,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-14 00:01:11,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 28. [2020-10-14 00:01:11,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-14 00:01:11,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-10-14 00:01:11,423 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 19 [2020-10-14 00:01:11,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:01:11,423 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-10-14 00:01:11,424 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 00:01:11,424 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-10-14 00:01:11,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-14 00:01:11,425 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:01:11,425 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:01:11,425 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 00:01:11,426 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:01:11,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:01:11,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1582955806, now seen corresponding path program 2 times [2020-10-14 00:01:11,427 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:01:11,428 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2032177592] [2020-10-14 00:01:11,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:01:11,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:01:11,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:11,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:11,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:12,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:01:12,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-14 00:01:12,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 00:01:12,245 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 797 [2020-10-14 00:01:12,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:01:12,247 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:01:12,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 00:01:12,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-14 00:01:12,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 00:01:12,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 00:01:12,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:01:12,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:01:12,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:12,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:01:12,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:01:12,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:01:12,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 00:01:12,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:01:12,333 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:01:12,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:01:12,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:01:12,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:01:12,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-14 00:01:12,341 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-14 00:01:12,341 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2032177592] [2020-10-14 00:01:12,342 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:01:12,342 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 00:01:12,343 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314993186] [2020-10-14 00:01:12,344 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 00:01:12,345 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:01:12,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 00:01:12,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-14 00:01:12,346 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 6 states. [2020-10-14 00:01:12,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:01:12,595 INFO L93 Difference]: Finished difference Result 81 states and 86 transitions. [2020-10-14 00:01:12,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 00:01:12,595 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-10-14 00:01:12,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:01:12,597 INFO L225 Difference]: With dead ends: 81 [2020-10-14 00:01:12,597 INFO L226 Difference]: Without dead ends: 64 [2020-10-14 00:01:12,599 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-14 00:01:12,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-14 00:01:12,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 32. [2020-10-14 00:01:12,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-14 00:01:12,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-10-14 00:01:12,614 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 23 [2020-10-14 00:01:12,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:01:12,615 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-10-14 00:01:12,615 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 00:01:12,615 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-10-14 00:01:12,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-14 00:01:12,617 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:01:12,617 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:01:12,618 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 00:01:12,618 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:01:12,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:01:12,618 INFO L82 PathProgramCache]: Analyzing trace with hash -657216102, now seen corresponding path program 3 times [2020-10-14 00:01:12,619 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:01:12,619 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1545667124] [2020-10-14 00:01:12,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:01:12,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:01:12,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:12,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:12,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:14,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:01:14,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-14 00:01:14,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 00:01:14,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2040 [2020-10-14 00:01:14,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:01:14,672 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:01:14,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 00:01:14,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-14 00:01:14,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 00:01:14,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:01:14,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:01:14,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:01:14,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:14,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:01:14,755 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:01:14,756 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:01:14,756 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 00:01:14,756 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:01:14,756 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:01:14,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:01:14,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:01:14,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:01:14,757 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:01:14,760 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-14 00:01:14,761 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1545667124] [2020-10-14 00:01:14,761 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:01:14,761 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 00:01:14,762 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874843233] [2020-10-14 00:01:14,762 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 00:01:14,762 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:01:14,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 00:01:14,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-14 00:01:14,763 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 7 states. [2020-10-14 00:01:15,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:01:15,058 INFO L93 Difference]: Finished difference Result 97 states and 102 transitions. [2020-10-14 00:01:15,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 00:01:15,059 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-10-14 00:01:15,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:01:15,060 INFO L225 Difference]: With dead ends: 97 [2020-10-14 00:01:15,060 INFO L226 Difference]: Without dead ends: 78 [2020-10-14 00:01:15,061 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2020-10-14 00:01:15,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-14 00:01:15,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 36. [2020-10-14 00:01:15,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-14 00:01:15,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-10-14 00:01:15,068 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 27 [2020-10-14 00:01:15,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:01:15,068 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-10-14 00:01:15,068 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 00:01:15,068 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-10-14 00:01:15,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-14 00:01:15,069 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:01:15,070 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:01:15,070 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 00:01:15,070 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:01:15,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:01:15,070 INFO L82 PathProgramCache]: Analyzing trace with hash 702132246, now seen corresponding path program 4 times [2020-10-14 00:01:15,071 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:01:15,071 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1633781306] [2020-10-14 00:01:15,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:01:15,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:01:15,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:15,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:15,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:17,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:01:17,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-14 00:01:17,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 00:01:17,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2890 [2020-10-14 00:01:17,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:01:17,974 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:01:17,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 00:01:17,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 00:01:17,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 00:01:17,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:01:18,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:01:18,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:01:18,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:18,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:01:18,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:01:18,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:01:18,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 00:01:18,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:01:18,056 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:01:18,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:01:18,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:01:18,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:01:18,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:01:18,062 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-14 00:01:18,062 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1633781306] [2020-10-14 00:01:18,062 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:01:18,063 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 00:01:18,063 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542964039] [2020-10-14 00:01:18,064 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 00:01:18,064 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:01:18,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 00:01:18,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-14 00:01:18,065 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 8 states. [2020-10-14 00:01:18,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:01:18,515 INFO L93 Difference]: Finished difference Result 113 states and 118 transitions. [2020-10-14 00:01:18,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 00:01:18,516 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-10-14 00:01:18,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:01:18,518 INFO L225 Difference]: With dead ends: 113 [2020-10-14 00:01:18,518 INFO L226 Difference]: Without dead ends: 92 [2020-10-14 00:01:18,519 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2020-10-14 00:01:18,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-14 00:01:18,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 40. [2020-10-14 00:01:18,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-14 00:01:18,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2020-10-14 00:01:18,526 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 31 [2020-10-14 00:01:18,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:01:18,526 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2020-10-14 00:01:18,526 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 00:01:18,527 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2020-10-14 00:01:18,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-14 00:01:18,528 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:01:18,528 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:01:18,528 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 00:01:18,529 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:01:18,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:01:18,529 INFO L82 PathProgramCache]: Analyzing trace with hash -294189934, now seen corresponding path program 5 times [2020-10-14 00:01:18,529 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:01:18,530 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1306341944] [2020-10-14 00:01:18,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:01:18,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:01:18,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:18,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:19,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:23,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:01:23,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-14 00:01:23,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 00:01:23,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 00:01:23,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:01:23,547 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:01:23,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 00:01:23,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-14 00:01:23,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 00:01:23,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:01:23,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:01:23,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:01:23,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:23,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:01:23,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:01:23,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:01:23,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 00:01:23,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:01:23,660 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:01:23,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:01:23,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:01:23,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:01:23,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:01:23,667 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-14 00:01:23,669 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1306341944] [2020-10-14 00:01:23,669 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:01:23,670 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 00:01:23,670 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507856572] [2020-10-14 00:01:23,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 00:01:23,671 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:01:23,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 00:01:23,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-14 00:01:23,673 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 9 states. [2020-10-14 00:01:24,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:01:24,257 INFO L93 Difference]: Finished difference Result 129 states and 134 transitions. [2020-10-14 00:01:24,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 00:01:24,258 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 35 [2020-10-14 00:01:24,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:01:24,260 INFO L225 Difference]: With dead ends: 129 [2020-10-14 00:01:24,261 INFO L226 Difference]: Without dead ends: 106 [2020-10-14 00:01:24,262 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2020-10-14 00:01:24,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-14 00:01:24,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 44. [2020-10-14 00:01:24,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-14 00:01:24,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2020-10-14 00:01:24,283 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 35 [2020-10-14 00:01:24,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:01:24,284 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2020-10-14 00:01:24,284 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 00:01:24,284 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2020-10-14 00:01:24,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-14 00:01:24,286 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:01:24,287 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:01:24,287 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 00:01:24,287 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:01:24,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:01:24,288 INFO L82 PathProgramCache]: Analyzing trace with hash 1966517006, now seen corresponding path program 6 times [2020-10-14 00:01:24,289 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:01:24,289 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [889905797] [2020-10-14 00:01:24,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:01:24,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:01:24,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:24,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:25,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:29,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:01:29,307 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-14 00:01:29,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 00:01:29,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-14 00:01:29,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:01:29,308 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:01:29,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 00:01:29,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 00:01:29,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-14 00:01:29,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:01:29,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:01:29,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:01:29,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:29,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:01:29,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:01:29,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:01:29,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 00:01:29,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:01:29,395 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:01:29,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:01:29,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:01:29,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:01:29,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:01:29,399 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-14 00:01:29,400 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [889905797] [2020-10-14 00:01:29,400 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:01:29,400 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 00:01:29,400 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43545059] [2020-10-14 00:01:29,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 00:01:29,401 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:01:29,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 00:01:29,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-14 00:01:29,402 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 10 states. [2020-10-14 00:01:29,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:01:29,973 INFO L93 Difference]: Finished difference Result 145 states and 150 transitions. [2020-10-14 00:01:29,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-14 00:01:29,974 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2020-10-14 00:01:29,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:01:29,976 INFO L225 Difference]: With dead ends: 145 [2020-10-14 00:01:29,976 INFO L226 Difference]: Without dead ends: 120 [2020-10-14 00:01:29,979 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2020-10-14 00:01:29,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-14 00:01:29,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 48. [2020-10-14 00:01:29,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-14 00:01:29,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2020-10-14 00:01:29,995 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 39 [2020-10-14 00:01:29,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:01:29,996 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2020-10-14 00:01:29,996 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 00:01:29,997 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2020-10-14 00:01:30,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-14 00:01:30,003 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:01:30,003 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:01:30,003 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 00:01:30,003 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:01:30,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:01:30,004 INFO L82 PathProgramCache]: Analyzing trace with hash 1042523018, now seen corresponding path program 7 times [2020-10-14 00:01:30,004 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:01:30,005 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1727277723] [2020-10-14 00:01:30,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:01:30,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:01:30,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:30,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:31,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:35,027 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:01:35,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-14 00:01:35,028 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 00:01:35,028 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-14 00:01:35,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:01:35,029 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:01:35,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 00:01:35,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-14 00:01:35,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 00:01:35,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:01:35,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:01:35,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:01:35,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:35,127 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:01:35,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:01:35,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:01:35,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 00:01:35,128 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:01:35,128 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:01:35,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:01:35,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:01:35,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:01:35,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:01:35,132 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-14 00:01:35,133 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1727277723] [2020-10-14 00:01:35,133 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:01:35,133 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 00:01:35,133 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829686194] [2020-10-14 00:01:35,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 00:01:35,134 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:01:35,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 00:01:35,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-14 00:01:35,135 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 11 states. [2020-10-14 00:01:35,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:01:35,596 INFO L93 Difference]: Finished difference Result 161 states and 166 transitions. [2020-10-14 00:01:35,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 00:01:35,597 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 43 [2020-10-14 00:01:35,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:01:35,598 INFO L225 Difference]: With dead ends: 161 [2020-10-14 00:01:35,598 INFO L226 Difference]: Without dead ends: 134 [2020-10-14 00:01:35,599 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2020-10-14 00:01:35,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-14 00:01:35,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 52. [2020-10-14 00:01:35,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-14 00:01:35,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2020-10-14 00:01:35,610 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 43 [2020-10-14 00:01:35,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:01:35,610 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2020-10-14 00:01:35,610 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 00:01:35,611 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2020-10-14 00:01:35,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-14 00:01:35,613 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:01:35,614 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:01:35,614 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 00:01:35,614 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:01:35,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:01:35,614 INFO L82 PathProgramCache]: Analyzing trace with hash 2059988486, now seen corresponding path program 8 times [2020-10-14 00:01:35,615 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:01:35,615 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1273788757] [2020-10-14 00:01:35,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:01:35,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:01:35,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:35,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:36,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:40,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:01:40,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-14 00:01:40,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 00:01:40,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-14 00:01:40,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:01:40,631 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:01:40,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 00:01:40,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-14 00:01:40,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-14 00:01:40,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:01:40,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:01:40,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:01:40,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:40,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:01:40,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:01:40,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:01:40,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 00:01:40,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:01:40,772 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:01:40,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:01:40,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:01:40,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:01:40,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:01:40,779 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2020-10-14 00:01:40,779 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1273788757] [2020-10-14 00:01:40,779 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:01:40,780 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 00:01:40,780 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477904037] [2020-10-14 00:01:40,780 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 00:01:40,780 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:01:40,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 00:01:40,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-14 00:01:40,781 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 9 states. [2020-10-14 00:01:41,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:01:41,093 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2020-10-14 00:01:41,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 00:01:41,093 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 47 [2020-10-14 00:01:41,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:01:41,094 INFO L225 Difference]: With dead ends: 62 [2020-10-14 00:01:41,095 INFO L226 Difference]: Without dead ends: 60 [2020-10-14 00:01:41,095 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-10-14 00:01:41,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-14 00:01:41,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2020-10-14 00:01:41,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-14 00:01:41,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2020-10-14 00:01:41,103 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 47 [2020-10-14 00:01:41,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:01:41,104 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2020-10-14 00:01:41,104 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 00:01:41,104 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2020-10-14 00:01:41,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-14 00:01:41,105 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:01:41,106 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:01:41,106 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 00:01:41,106 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:01:41,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:01:41,107 INFO L82 PathProgramCache]: Analyzing trace with hash 1478506813, now seen corresponding path program 1 times [2020-10-14 00:01:41,107 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:01:41,107 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1242941390] [2020-10-14 00:01:41,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:01:41,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:01:41,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:41,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:41,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:41,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:45,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:46,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:01:46,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-14 00:01:46,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 00:01:46,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-14 00:01:46,128 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:01:46,128 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:01:46,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 00:01:46,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 00:01:46,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 00:01:46,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:01:46,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:01:46,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:01:46,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:46,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:01:46,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:01:46,225 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:01:46,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 00:01:46,226 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:01:46,226 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:01:46,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:01:46,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:01:46,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:01:46,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:01:46,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-14 00:01:46,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:01:46,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:46,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:01:46,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 00:01:46,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:01:46,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 00:01:46,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:01:46,232 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:01:46,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:01:46,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 00:01:46,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:01:46,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:01:46,237 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 2 proven. 64 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-10-14 00:01:46,237 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1242941390] [2020-10-14 00:01:46,238 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:01:46,238 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 00:01:46,238 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543120331] [2020-10-14 00:01:46,239 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 00:01:46,239 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:01:46,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 00:01:46,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-14 00:01:46,240 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 12 states. [2020-10-14 00:01:46,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:01:46,714 INFO L93 Difference]: Finished difference Result 181 states and 186 transitions. [2020-10-14 00:01:46,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-14 00:01:46,716 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 55 [2020-10-14 00:01:46,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:01:46,717 INFO L225 Difference]: With dead ends: 181 [2020-10-14 00:01:46,717 INFO L226 Difference]: Without dead ends: 146 [2020-10-14 00:01:46,719 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2020-10-14 00:01:46,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-14 00:01:46,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 62. [2020-10-14 00:01:46,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-14 00:01:46,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2020-10-14 00:01:46,727 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 55 [2020-10-14 00:01:46,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:01:46,727 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2020-10-14 00:01:46,727 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 00:01:46,727 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2020-10-14 00:01:46,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-14 00:01:46,728 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:01:46,728 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:01:46,728 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 00:01:46,728 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:01:46,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:01:46,728 INFO L82 PathProgramCache]: Analyzing trace with hash 139631033, now seen corresponding path program 2 times [2020-10-14 00:01:46,729 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:01:46,729 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [148075896] [2020-10-14 00:01:46,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:01:46,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:01:46,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:46,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:47,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:47,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:50,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:51,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:01:51,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-14 00:01:51,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 00:01:51,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 00:01:51,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:01:51,759 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:01:51,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 00:01:51,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 00:01:51,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 00:01:51,759 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:01:51,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:01:51,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:01:51,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:51,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:01:51,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:01:51,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:01:51,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 00:01:51,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:01:51,883 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:01:51,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:01:51,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:01:51,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:01:51,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:01:51,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-14 00:01:51,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:01:51,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:51,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:01:51,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 00:01:51,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:01:51,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 00:01:51,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:01:51,888 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:01:51,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:01:51,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 00:01:51,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:01:51,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:01:51,894 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 2 proven. 81 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2020-10-14 00:01:51,894 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [148075896] [2020-10-14 00:01:51,894 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:01:51,894 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 00:01:51,895 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404315592] [2020-10-14 00:01:51,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 00:01:51,895 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:01:51,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 00:01:51,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-14 00:01:51,896 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand 13 states. [2020-10-14 00:01:52,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:01:52,445 INFO L93 Difference]: Finished difference Result 197 states and 202 transitions. [2020-10-14 00:01:52,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-14 00:01:52,445 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 59 [2020-10-14 00:01:52,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:01:52,447 INFO L225 Difference]: With dead ends: 197 [2020-10-14 00:01:52,447 INFO L226 Difference]: Without dead ends: 160 [2020-10-14 00:01:52,449 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2020-10-14 00:01:52,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-14 00:01:52,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 66. [2020-10-14 00:01:52,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-14 00:01:52,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2020-10-14 00:01:52,468 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 59 [2020-10-14 00:01:52,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:01:52,469 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2020-10-14 00:01:52,469 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 00:01:52,469 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2020-10-14 00:01:52,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-14 00:01:52,470 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:01:52,470 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:01:52,470 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 00:01:52,470 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:01:52,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:01:52,471 INFO L82 PathProgramCache]: Analyzing trace with hash 1633766453, now seen corresponding path program 3 times [2020-10-14 00:01:52,471 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:01:52,471 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1156948821] [2020-10-14 00:01:52,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:01:52,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:01:52,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:52,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:52,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:53,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:56,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:57,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:57,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:01:57,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-14 00:01:57,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 00:01:57,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5313 [2020-10-14 00:01:57,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:01:57,797 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:01:57,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 00:01:57,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 00:01:57,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-14 00:01:57,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:01:57,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:01:57,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:01:57,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:57,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:01:57,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:01:57,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:01:57,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 00:01:57,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:01:57,919 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:01:57,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:01:57,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:01:57,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:01:57,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:01:57,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-14 00:01:57,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:01:57,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:57,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:01:57,925 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 00:01:57,925 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:01:57,925 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 00:01:57,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:01:57,926 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:01:57,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:01:57,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 00:01:57,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:01:57,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:01:57,934 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 2 proven. 100 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2020-10-14 00:01:57,934 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1156948821] [2020-10-14 00:01:57,934 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:01:57,934 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 00:01:57,935 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621879169] [2020-10-14 00:01:57,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 00:01:57,940 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:01:57,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 00:01:57,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-14 00:01:57,941 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand 14 states. [2020-10-14 00:01:58,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:01:58,621 INFO L93 Difference]: Finished difference Result 213 states and 218 transitions. [2020-10-14 00:01:58,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-14 00:01:58,621 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 63 [2020-10-14 00:01:58,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:01:58,623 INFO L225 Difference]: With dead ends: 213 [2020-10-14 00:01:58,623 INFO L226 Difference]: Without dead ends: 174 [2020-10-14 00:01:58,624 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=234, Invalid=366, Unknown=0, NotChecked=0, Total=600 [2020-10-14 00:01:58,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-10-14 00:01:58,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 70. [2020-10-14 00:01:58,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-14 00:01:58,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2020-10-14 00:01:58,636 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 63 [2020-10-14 00:01:58,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:01:58,637 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2020-10-14 00:01:58,637 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 00:01:58,638 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2020-10-14 00:01:58,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-14 00:01:58,639 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:01:58,640 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:01:58,640 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 00:01:58,640 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:01:58,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:01:58,640 INFO L82 PathProgramCache]: Analyzing trace with hash 1851216049, now seen corresponding path program 4 times [2020-10-14 00:01:58,641 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:01:58,641 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [201439369] [2020-10-14 00:01:58,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:01:58,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:01:58,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:58,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:58,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:01:59,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:03,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:03,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:02:03,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-14 00:02:03,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 00:02:03,684 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-10-14 00:02:03,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:02:03,685 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:02:03,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 00:02:03,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-14 00:02:03,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-14 00:02:03,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:02:03,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:02:03,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:02:03,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:03,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:02:03,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:02:03,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:02:03,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 00:02:03,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:02:03,827 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:02:03,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:02:03,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:02:03,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:02:03,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:02:03,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-14 00:02:03,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:02:03,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:03,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:02:03,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 00:02:03,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:02:03,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 00:02:03,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:02:03,834 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:02:03,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 00:02:03,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:02:03,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 00:02:03,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:02:03,845 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 2 proven. 33 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2020-10-14 00:02:03,845 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [201439369] [2020-10-14 00:02:03,845 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:02:03,845 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 00:02:03,846 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364226926] [2020-10-14 00:02:03,846 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 00:02:03,846 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:02:03,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 00:02:03,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-14 00:02:03,847 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 11 states. [2020-10-14 00:02:04,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:02:04,333 INFO L93 Difference]: Finished difference Result 82 states and 84 transitions. [2020-10-14 00:02:04,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 00:02:04,334 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 67 [2020-10-14 00:02:04,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:02:04,336 INFO L225 Difference]: With dead ends: 82 [2020-10-14 00:02:04,336 INFO L226 Difference]: Without dead ends: 80 [2020-10-14 00:02:04,337 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2020-10-14 00:02:04,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-14 00:02:04,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 78. [2020-10-14 00:02:04,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-14 00:02:04,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2020-10-14 00:02:04,346 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 67 [2020-10-14 00:02:04,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:02:04,346 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2020-10-14 00:02:04,346 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 00:02:04,346 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2020-10-14 00:02:04,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-14 00:02:04,347 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:02:04,347 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:02:04,348 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 00:02:04,348 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:02:04,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:02:04,348 INFO L82 PathProgramCache]: Analyzing trace with hash 434290920, now seen corresponding path program 5 times [2020-10-14 00:02:04,348 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:02:04,349 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [913154129] [2020-10-14 00:02:04,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:02:04,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:02:04,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:04,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:04,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:04,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:05,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:06,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:07,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:07,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:08,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:09,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:02:09,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-14 00:02:09,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-14 00:02:09,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5322 [2020-10-14 00:02:09,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:02:09,683 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:02:09,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 00:02:09,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-14 00:02:09,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-14 00:02:09,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:02:09,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:02:09,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:02:09,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:09,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:02:09,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:02:09,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:02:09,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 00:02:09,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:02:09,820 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:02:09,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:02:09,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:02:09,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:02:09,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:02:09,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-14 00:02:09,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:02:09,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:09,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:02:09,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 00:02:09,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:02:09,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 00:02:09,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:02:09,824 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:02:09,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:02:09,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 00:02:09,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:02:09,825 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:02:09,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-10-14 00:02:09,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:02:09,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:09,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:02:09,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 00:02:09,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:02:09,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 00:02:09,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:02:09,829 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:02:09,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:02:09,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 00:02:09,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:02:09,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:02:09,835 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 4 proven. 121 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2020-10-14 00:02:09,835 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [913154129] [2020-10-14 00:02:09,835 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:02:09,836 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 00:02:09,836 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047327852] [2020-10-14 00:02:09,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 00:02:09,836 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:02:09,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 00:02:09,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-14 00:02:09,837 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand 15 states. [2020-10-14 00:02:10,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:02:10,497 INFO L93 Difference]: Finished difference Result 235 states and 240 transitions. [2020-10-14 00:02:10,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-14 00:02:10,498 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 75 [2020-10-14 00:02:10,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:02:10,500 INFO L225 Difference]: With dead ends: 235 [2020-10-14 00:02:10,500 INFO L226 Difference]: Without dead ends: 186 [2020-10-14 00:02:10,501 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=273, Invalid=429, Unknown=0, NotChecked=0, Total=702 [2020-10-14 00:02:10,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-14 00:02:10,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 82. [2020-10-14 00:02:10,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-14 00:02:10,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2020-10-14 00:02:10,511 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 75 [2020-10-14 00:02:10,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:02:10,511 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2020-10-14 00:02:10,511 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 00:02:10,511 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2020-10-14 00:02:10,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-14 00:02:10,512 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:02:10,512 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:02:10,512 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 00:02:10,513 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:02:10,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:02:10,513 INFO L82 PathProgramCache]: Analyzing trace with hash -38085788, now seen corresponding path program 6 times [2020-10-14 00:02:10,513 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:02:10,513 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [51736659] [2020-10-14 00:02:10,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:02:10,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:02:10,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:10,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:10,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:11,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:12,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:13,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:15,529 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:02:15,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-14 00:02:15,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 00:02:15,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-14 00:02:15,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:02:15,530 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:02:15,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 00:02:15,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 00:02:15,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-14 00:02:15,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:02:15,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:02:15,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:02:15,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:15,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:02:15,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:02:15,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:02:15,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 00:02:15,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:02:15,664 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:02:15,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:02:15,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:02:15,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:02:15,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 00:02:15,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-14 00:02:15,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:02:15,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:15,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:02:15,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 00:02:15,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:02:15,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 00:02:15,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:02:15,670 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:02:15,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:02:15,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 00:02:15,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:02:15,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:02:15,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-10-14 00:02:15,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:02:15,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:15,672 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:02:15,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 00:02:15,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:02:15,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 00:02:15,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:02:15,673 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:02:15,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:02:15,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 00:02:15,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:02:15,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:02:15,679 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 4 proven. 144 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2020-10-14 00:02:15,679 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [51736659] [2020-10-14 00:02:15,682 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:02:15,682 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 00:02:15,682 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568869159] [2020-10-14 00:02:15,683 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 00:02:15,683 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:02:15,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 00:02:15,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-14 00:02:15,683 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand 16 states. [2020-10-14 00:02:16,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:02:16,489 INFO L93 Difference]: Finished difference Result 251 states and 256 transitions. [2020-10-14 00:02:16,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-14 00:02:16,493 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 79 [2020-10-14 00:02:16,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:02:16,498 INFO L225 Difference]: With dead ends: 251 [2020-10-14 00:02:16,498 INFO L226 Difference]: Without dead ends: 200 [2020-10-14 00:02:16,500 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=315, Invalid=497, Unknown=0, NotChecked=0, Total=812 [2020-10-14 00:02:16,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-10-14 00:02:16,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 86. [2020-10-14 00:02:16,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-14 00:02:16,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2020-10-14 00:02:16,533 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 79 [2020-10-14 00:02:16,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:02:16,533 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2020-10-14 00:02:16,533 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 00:02:16,534 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2020-10-14 00:02:16,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-14 00:02:16,535 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:02:16,535 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:02:16,536 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 00:02:16,536 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:02:16,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:02:16,536 INFO L82 PathProgramCache]: Analyzing trace with hash -560052256, now seen corresponding path program 7 times [2020-10-14 00:02:16,537 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:02:16,537 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [75768702] [2020-10-14 00:02:16,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:02:16,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:02:16,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:16,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:17,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:19,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:21,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:02:21,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-14 00:02:21,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 00:02:21,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 00:02:21,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:02:21,557 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:02:21,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 00:02:21,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-14 00:02:21,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-14 00:02:21,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:02:21,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:02:21,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:02:21,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:21,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:02:21,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:02:21,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:02:21,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 00:02:21,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:02:21,711 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:02:21,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:02:21,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:02:21,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:02:21,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:02:21,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-10-14 00:02:21,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:02:21,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:21,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:02:21,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 00:02:21,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:02:21,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 00:02:21,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:02:21,715 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:02:21,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:02:21,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 00:02:21,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:02:21,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:02:21,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-10-14 00:02:21,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:02:21,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:21,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:02:21,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 00:02:21,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:02:21,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 00:02:21,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:02:21,719 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:02:21,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:02:21,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 00:02:21,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:02:21,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:02:21,725 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 4 proven. 169 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2020-10-14 00:02:21,725 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [75768702] [2020-10-14 00:02:21,726 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:02:21,726 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 00:02:21,726 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625046426] [2020-10-14 00:02:21,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 00:02:21,727 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:02:21,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 00:02:21,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-14 00:02:21,727 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand 17 states. [2020-10-14 00:02:22,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:02:22,714 INFO L93 Difference]: Finished difference Result 267 states and 272 transitions. [2020-10-14 00:02:22,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-14 00:02:22,714 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 83 [2020-10-14 00:02:22,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:02:22,717 INFO L225 Difference]: With dead ends: 267 [2020-10-14 00:02:22,717 INFO L226 Difference]: Without dead ends: 214 [2020-10-14 00:02:22,720 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=360, Invalid=570, Unknown=0, NotChecked=0, Total=930 [2020-10-14 00:02:22,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-10-14 00:02:22,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 90. [2020-10-14 00:02:22,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-14 00:02:22,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 92 transitions. [2020-10-14 00:02:22,743 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 92 transitions. Word has length 83 [2020-10-14 00:02:22,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:02:22,743 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 92 transitions. [2020-10-14 00:02:22,744 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 00:02:22,744 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 92 transitions. [2020-10-14 00:02:22,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-14 00:02:22,745 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:02:22,745 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:02:22,745 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 00:02:22,746 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:02:22,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:02:22,746 INFO L82 PathProgramCache]: Analyzing trace with hash 555222620, now seen corresponding path program 8 times [2020-10-14 00:02:22,747 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:02:22,753 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1394283850] [2020-10-14 00:02:22,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:02:22,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:02:22,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:22,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:23,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:25,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:26,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:27,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:28,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:02:28,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-14 00:02:28,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 00:02:28,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5671 [2020-10-14 00:02:28,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:02:28,443 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:02:28,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 00:02:28,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-14 00:02:28,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-14 00:02:28,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:02:28,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:02:28,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:02:28,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:28,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:02:28,609 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:02:28,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:02:28,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 00:02:28,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:02:28,610 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:02:28,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:02:28,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:02:28,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:02:28,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:02:28,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-10-14 00:02:28,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:02:28,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:28,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:02:28,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 00:02:28,614 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:02:28,614 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 00:02:28,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:02:28,615 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:02:28,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:02:28,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 00:02:28,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:02:28,615 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:02:28,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-10-14 00:02:28,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:02:28,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:28,618 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:02:28,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 00:02:28,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:02:28,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 00:02:28,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:02:28,619 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:02:28,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:02:28,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 00:02:28,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:02:28,620 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:02:28,625 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 4 proven. 196 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2020-10-14 00:02:28,626 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1394283850] [2020-10-14 00:02:28,628 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:02:28,628 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 00:02:28,628 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86205054] [2020-10-14 00:02:28,630 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 00:02:28,630 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:02:28,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 00:02:28,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-14 00:02:28,631 INFO L87 Difference]: Start difference. First operand 90 states and 92 transitions. Second operand 18 states. [2020-10-14 00:02:29,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:02:29,589 INFO L93 Difference]: Finished difference Result 283 states and 288 transitions. [2020-10-14 00:02:29,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-14 00:02:29,590 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 87 [2020-10-14 00:02:29,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:02:29,591 INFO L225 Difference]: With dead ends: 283 [2020-10-14 00:02:29,591 INFO L226 Difference]: Without dead ends: 228 [2020-10-14 00:02:29,592 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=408, Invalid=648, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 00:02:29,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-10-14 00:02:29,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 94. [2020-10-14 00:02:29,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-14 00:02:29,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 96 transitions. [2020-10-14 00:02:29,608 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 96 transitions. Word has length 87 [2020-10-14 00:02:29,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:02:29,608 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 96 transitions. [2020-10-14 00:02:29,608 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 00:02:29,608 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 96 transitions. [2020-10-14 00:02:29,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-14 00:02:29,609 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:02:29,609 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:02:29,609 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-14 00:02:29,609 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:02:29,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:02:29,610 INFO L82 PathProgramCache]: Analyzing trace with hash 1530074840, now seen corresponding path program 9 times [2020-10-14 00:02:29,610 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:02:29,610 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2056094026] [2020-10-14 00:02:29,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:02:29,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:02:29,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:29,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:29,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:30,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:32,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:33,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:34,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:02:34,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-14 00:02:34,706 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 00:02:34,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5081 [2020-10-14 00:02:34,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:02:34,706 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:02:34,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 00:02:34,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 00:02:34,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-14 00:02:34,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:02:34,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:02:34,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:02:34,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:34,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:02:34,909 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:02:34,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:02:34,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 00:02:34,910 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:02:34,910 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:02:34,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:02:34,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:02:34,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:02:34,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:02:34,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-10-14 00:02:34,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:02:34,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:34,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:02:34,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 00:02:34,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:02:34,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 00:02:34,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:02:34,915 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:02:34,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:02:34,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 00:02:34,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:02:34,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:02:34,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-10-14 00:02:34,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:02:34,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:34,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:02:34,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 00:02:34,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:02:34,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 00:02:34,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:02:34,919 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:02:34,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:02:34,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 00:02:34,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:02:34,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:02:34,926 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 4 proven. 225 refuted. 0 times theorem prover too weak. 237 trivial. 0 not checked. [2020-10-14 00:02:34,926 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2056094026] [2020-10-14 00:02:34,927 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:02:34,927 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-14 00:02:34,927 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194191093] [2020-10-14 00:02:34,927 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-14 00:02:34,928 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:02:34,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-14 00:02:34,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-14 00:02:34,928 INFO L87 Difference]: Start difference. First operand 94 states and 96 transitions. Second operand 19 states. [2020-10-14 00:02:35,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:02:35,814 INFO L93 Difference]: Finished difference Result 299 states and 304 transitions. [2020-10-14 00:02:35,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-14 00:02:35,815 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 91 [2020-10-14 00:02:35,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:02:35,817 INFO L225 Difference]: With dead ends: 299 [2020-10-14 00:02:35,817 INFO L226 Difference]: Without dead ends: 242 [2020-10-14 00:02:35,818 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=459, Invalid=731, Unknown=0, NotChecked=0, Total=1190 [2020-10-14 00:02:35,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-10-14 00:02:35,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 98. [2020-10-14 00:02:35,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-14 00:02:35,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 100 transitions. [2020-10-14 00:02:35,837 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 100 transitions. Word has length 91 [2020-10-14 00:02:35,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:02:35,838 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 100 transitions. [2020-10-14 00:02:35,838 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-14 00:02:35,839 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 100 transitions. [2020-10-14 00:02:35,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-14 00:02:35,841 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:02:35,841 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:02:35,841 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-14 00:02:35,841 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:02:35,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:02:35,842 INFO L82 PathProgramCache]: Analyzing trace with hash -730171052, now seen corresponding path program 10 times [2020-10-14 00:02:35,842 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:02:35,842 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1541897964] [2020-10-14 00:02:35,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:02:35,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:02:35,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:35,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:35,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:37,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:40,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:41,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:02:41,472 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-14 00:02:41,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 00:02:41,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5615 [2020-10-14 00:02:41,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:02:41,472 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:02:41,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 00:02:41,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 00:02:41,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-14 00:02:41,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:02:41,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:02:41,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:02:41,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:41,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:02:41,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:02:41,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:02:41,684 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 00:02:41,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:02:41,685 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:02:41,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:02:41,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:02:41,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:02:41,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:02:41,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-10-14 00:02:41,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:02:41,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:41,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:02:41,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 00:02:41,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:02:41,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 00:02:41,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:02:41,690 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:02:41,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:02:41,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 00:02:41,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:02:41,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:02:41,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-10-14 00:02:41,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:02:41,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:41,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:02:41,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 00:02:41,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:02:41,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 00:02:41,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:02:41,694 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:02:41,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:02:41,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 00:02:41,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:02:41,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:02:41,701 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 4 proven. 256 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2020-10-14 00:02:41,702 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1541897964] [2020-10-14 00:02:41,702 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:02:41,702 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-14 00:02:41,702 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719476283] [2020-10-14 00:02:41,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-14 00:02:41,703 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:02:41,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-14 00:02:41,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-14 00:02:41,703 INFO L87 Difference]: Start difference. First operand 98 states and 100 transitions. Second operand 20 states. [2020-10-14 00:02:42,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:02:42,744 INFO L93 Difference]: Finished difference Result 315 states and 320 transitions. [2020-10-14 00:02:42,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-14 00:02:42,745 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 95 [2020-10-14 00:02:42,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:02:42,747 INFO L225 Difference]: With dead ends: 315 [2020-10-14 00:02:42,747 INFO L226 Difference]: Without dead ends: 256 [2020-10-14 00:02:42,748 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=513, Invalid=819, Unknown=0, NotChecked=0, Total=1332 [2020-10-14 00:02:42,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2020-10-14 00:02:42,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 102. [2020-10-14 00:02:42,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-14 00:02:42,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 104 transitions. [2020-10-14 00:02:42,757 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 104 transitions. Word has length 95 [2020-10-14 00:02:42,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:02:42,758 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 104 transitions. [2020-10-14 00:02:42,758 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-14 00:02:42,758 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 104 transitions. [2020-10-14 00:02:42,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-14 00:02:42,759 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:02:42,759 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:02:42,759 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-14 00:02:42,759 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:02:42,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:02:42,760 INFO L82 PathProgramCache]: Analyzing trace with hash 100216272, now seen corresponding path program 11 times [2020-10-14 00:02:42,760 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:02:42,760 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1087802290] [2020-10-14 00:02:42,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:02:42,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:02:42,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:42,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:43,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:44,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:46,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:47,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:48,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:02:48,980 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-14 00:02:48,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 00:02:48,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6211 [2020-10-14 00:02:48,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:02:48,981 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:02:48,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-14 00:02:48,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 00:02:48,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-14 00:02:48,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:02:49,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:02:49,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:02:49,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:49,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:02:49,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:02:49,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:02:49,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 00:02:49,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:02:49,262 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:02:49,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:02:49,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:02:49,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:02:49,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:02:49,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-10-14 00:02:49,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:02:49,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:49,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:02:49,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 00:02:49,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:02:49,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 00:02:49,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:02:49,271 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:02:49,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:02:49,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 00:02:49,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:02:49,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:02:49,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-10-14 00:02:49,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:02:49,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:49,276 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:02:49,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 00:02:49,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:02:49,277 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 00:02:49,277 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:02:49,277 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:02:49,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:02:49,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 00:02:49,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:02:49,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:02:49,294 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 4 proven. 289 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-10-14 00:02:49,295 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1087802290] [2020-10-14 00:02:49,295 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:02:49,295 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-14 00:02:49,296 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833620837] [2020-10-14 00:02:49,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-14 00:02:49,297 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:02:49,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-14 00:02:49,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-14 00:02:49,300 INFO L87 Difference]: Start difference. First operand 102 states and 104 transitions. Second operand 21 states. [2020-10-14 00:02:50,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:02:50,375 INFO L93 Difference]: Finished difference Result 331 states and 336 transitions. [2020-10-14 00:02:50,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-14 00:02:50,376 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 99 [2020-10-14 00:02:50,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:02:50,378 INFO L225 Difference]: With dead ends: 331 [2020-10-14 00:02:50,378 INFO L226 Difference]: Without dead ends: 270 [2020-10-14 00:02:50,379 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=570, Invalid=912, Unknown=0, NotChecked=0, Total=1482 [2020-10-14 00:02:50,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2020-10-14 00:02:50,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 106. [2020-10-14 00:02:50,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-14 00:02:50,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 108 transitions. [2020-10-14 00:02:50,390 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 108 transitions. Word has length 99 [2020-10-14 00:02:50,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:02:50,390 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 108 transitions. [2020-10-14 00:02:50,390 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-14 00:02:50,391 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 108 transitions. [2020-10-14 00:02:50,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-14 00:02:50,391 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:02:50,392 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:02:50,392 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-14 00:02:50,392 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:02:50,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:02:50,392 INFO L82 PathProgramCache]: Analyzing trace with hash 440022092, now seen corresponding path program 12 times [2020-10-14 00:02:50,392 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:02:50,392 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [228276167] [2020-10-14 00:02:50,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:02:50,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:02:50,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:50,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:50,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:52,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:55,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:02:55,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-14 00:02:55,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 00:02:55,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-14 00:02:55,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:02:55,406 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:02:55,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 00:02:55,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-14 00:02:55,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-14 00:02:55,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:02:55,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:02:55,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:02:55,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:55,647 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:02:55,647 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:02:55,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:02:55,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 00:02:55,648 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:02:55,648 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:02:55,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:02:55,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:02:55,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:02:55,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:02:55,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-10-14 00:02:55,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:02:55,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:55,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:02:55,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 00:02:55,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:02:55,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 00:02:55,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:02:55,651 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:02:55,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:02:55,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 00:02:55,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:02:55,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:02:55,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-10-14 00:02:55,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:02:55,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:55,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:02:55,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 00:02:55,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:02:55,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 00:02:55,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:02:55,654 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:02:55,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:02:55,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 00:02:55,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:02:55,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:02:55,662 INFO L134 CoverageAnalysis]: Checked inductivity of 664 backedges. 4 proven. 324 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked. [2020-10-14 00:02:55,663 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [228276167] [2020-10-14 00:02:55,663 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:02:55,663 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-14 00:02:55,663 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685740925] [2020-10-14 00:02:55,663 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-14 00:02:55,664 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:02:55,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-14 00:02:55,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-14 00:02:55,664 INFO L87 Difference]: Start difference. First operand 106 states and 108 transitions. Second operand 22 states. [2020-10-14 00:02:56,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:02:56,776 INFO L93 Difference]: Finished difference Result 347 states and 352 transitions. [2020-10-14 00:02:56,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-14 00:02:56,779 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 103 [2020-10-14 00:02:56,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:02:56,781 INFO L225 Difference]: With dead ends: 347 [2020-10-14 00:02:56,782 INFO L226 Difference]: Without dead ends: 284 [2020-10-14 00:02:56,783 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=630, Invalid=1010, Unknown=0, NotChecked=0, Total=1640 [2020-10-14 00:02:56,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2020-10-14 00:02:56,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 110. [2020-10-14 00:02:56,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-14 00:02:56,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 112 transitions. [2020-10-14 00:02:56,794 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 112 transitions. Word has length 103 [2020-10-14 00:02:56,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:02:56,794 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 112 transitions. [2020-10-14 00:02:56,794 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-14 00:02:56,794 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 112 transitions. [2020-10-14 00:02:56,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-14 00:02:56,795 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:02:56,795 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:02:56,795 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-14 00:02:56,796 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:02:56,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:02:56,796 INFO L82 PathProgramCache]: Analyzing trace with hash 1833471176, now seen corresponding path program 13 times [2020-10-14 00:02:56,796 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:02:56,796 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2059381938] [2020-10-14 00:02:56,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:02:56,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:02:56,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:56,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:57,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:02:58,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:01,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:03:01,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-14 00:03:01,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 00:03:01,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 00:03:01,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:03:01,808 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:03:01,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-14 00:03:01,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-14 00:03:01,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-14 00:03:01,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:03:02,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:03:02,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:03:02,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:02,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:03:02,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:03:02,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:03:02,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 00:03:02,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:03:02,070 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:03:02,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:03:02,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:03:02,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:03:02,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:03:02,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-10-14 00:03:02,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:03:02,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:02,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:03:02,073 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 00:03:02,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:03:02,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 00:03:02,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:03:02,073 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:03:02,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:03:02,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 00:03:02,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:03:02,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:03:02,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-14 00:03:02,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:03:02,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:02,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:03:02,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 00:03:02,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:03:02,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 00:03:02,076 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:03:02,076 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:03:02,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:03:02,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 00:03:02,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:03:02,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:03:02,084 INFO L134 CoverageAnalysis]: Checked inductivity of 738 backedges. 4 proven. 361 refuted. 0 times theorem prover too weak. 373 trivial. 0 not checked. [2020-10-14 00:03:02,084 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2059381938] [2020-10-14 00:03:02,084 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:03:02,085 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-14 00:03:02,085 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963557259] [2020-10-14 00:03:02,085 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-14 00:03:02,085 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:03:02,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-14 00:03:02,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-14 00:03:02,086 INFO L87 Difference]: Start difference. First operand 110 states and 112 transitions. Second operand 23 states. [2020-10-14 00:03:03,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:03:03,331 INFO L93 Difference]: Finished difference Result 363 states and 368 transitions. [2020-10-14 00:03:03,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-14 00:03:03,332 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 107 [2020-10-14 00:03:03,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:03:03,334 INFO L225 Difference]: With dead ends: 363 [2020-10-14 00:03:03,334 INFO L226 Difference]: Without dead ends: 298 [2020-10-14 00:03:03,335 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=693, Invalid=1113, Unknown=0, NotChecked=0, Total=1806 [2020-10-14 00:03:03,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2020-10-14 00:03:03,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 114. [2020-10-14 00:03:03,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-14 00:03:03,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 116 transitions. [2020-10-14 00:03:03,345 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 116 transitions. Word has length 107 [2020-10-14 00:03:03,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:03:03,345 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 116 transitions. [2020-10-14 00:03:03,345 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-14 00:03:03,345 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 116 transitions. [2020-10-14 00:03:03,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-14 00:03:03,346 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:03:03,346 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:03:03,346 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-14 00:03:03,347 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:03:03,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:03:03,347 INFO L82 PathProgramCache]: Analyzing trace with hash 212809540, now seen corresponding path program 14 times [2020-10-14 00:03:03,347 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:03:03,347 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [134968575] [2020-10-14 00:03:03,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:03:03,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:03:03,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:03,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:04,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:06,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:08,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:03:08,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-14 00:03:08,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 00:03:08,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 00:03:08,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:03:08,360 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:03:08,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-14 00:03:08,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 00:03:08,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-14 00:03:08,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:03:08,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:03:08,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:03:08,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:08,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:03:08,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:03:08,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:03:08,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 00:03:08,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:03:08,641 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:03:08,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:03:08,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:03:08,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:03:08,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:03:08,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-10-14 00:03:08,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:03:08,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:08,643 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:03:08,643 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 00:03:08,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:03:08,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 00:03:08,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:03:08,644 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:03:08,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:03:08,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 00:03:08,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:03:08,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:03:08,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2020-10-14 00:03:08,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:03:08,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:08,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:03:08,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 00:03:08,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:03:08,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 00:03:08,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:03:08,647 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:03:08,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:03:08,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 00:03:08,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:03:08,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:03:08,653 INFO L134 CoverageAnalysis]: Checked inductivity of 816 backedges. 4 proven. 400 refuted. 0 times theorem prover too weak. 412 trivial. 0 not checked. [2020-10-14 00:03:08,653 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [134968575] [2020-10-14 00:03:08,654 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:03:08,654 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-14 00:03:08,654 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958884264] [2020-10-14 00:03:08,654 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-14 00:03:08,654 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:03:08,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-14 00:03:08,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-14 00:03:08,655 INFO L87 Difference]: Start difference. First operand 114 states and 116 transitions. Second operand 24 states. [2020-10-14 00:03:09,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:03:09,983 INFO L93 Difference]: Finished difference Result 379 states and 384 transitions. [2020-10-14 00:03:09,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-14 00:03:09,983 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 111 [2020-10-14 00:03:09,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:03:09,985 INFO L225 Difference]: With dead ends: 379 [2020-10-14 00:03:09,985 INFO L226 Difference]: Without dead ends: 312 [2020-10-14 00:03:09,986 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=759, Invalid=1221, Unknown=0, NotChecked=0, Total=1980 [2020-10-14 00:03:09,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2020-10-14 00:03:09,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 118. [2020-10-14 00:03:09,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-14 00:03:09,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 120 transitions. [2020-10-14 00:03:09,999 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 120 transitions. Word has length 111 [2020-10-14 00:03:09,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:03:09,999 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 120 transitions. [2020-10-14 00:03:09,999 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-14 00:03:09,999 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 120 transitions. [2020-10-14 00:03:10,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-14 00:03:10,000 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:03:10,000 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:03:10,001 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-14 00:03:10,001 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:03:10,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:03:10,001 INFO L82 PathProgramCache]: Analyzing trace with hash 930689984, now seen corresponding path program 15 times [2020-10-14 00:03:10,001 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:03:10,002 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1675301173] [2020-10-14 00:03:10,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:03:10,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:03:10,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:10,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:11,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:13,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:15,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:03:15,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-14 00:03:15,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 00:03:15,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-14 00:03:15,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:03:15,029 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:03:15,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-14 00:03:15,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 00:03:15,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-14 00:03:15,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:03:15,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:03:15,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:03:15,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:15,343 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:03:15,343 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:03:15,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:03:15,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 00:03:15,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:03:15,344 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:03:15,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:03:15,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:03:15,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:03:15,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:03:15,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-14 00:03:15,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:03:15,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:15,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:03:15,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 00:03:15,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:03:15,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 00:03:15,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:03:15,348 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:03:15,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:03:15,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 00:03:15,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:03:15,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:03:15,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-10-14 00:03:15,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:03:15,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:15,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:03:15,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 00:03:15,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:03:15,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 00:03:15,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:03:15,351 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:03:15,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:03:15,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 00:03:15,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:03:15,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:03:15,358 INFO L134 CoverageAnalysis]: Checked inductivity of 898 backedges. 4 proven. 441 refuted. 0 times theorem prover too weak. 453 trivial. 0 not checked. [2020-10-14 00:03:15,359 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1675301173] [2020-10-14 00:03:15,359 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:03:15,359 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-14 00:03:15,359 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862508814] [2020-10-14 00:03:15,359 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-14 00:03:15,359 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:03:15,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-14 00:03:15,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-14 00:03:15,360 INFO L87 Difference]: Start difference. First operand 118 states and 120 transitions. Second operand 25 states. [2020-10-14 00:03:16,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:03:16,810 INFO L93 Difference]: Finished difference Result 395 states and 400 transitions. [2020-10-14 00:03:16,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-14 00:03:16,810 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 115 [2020-10-14 00:03:16,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:03:16,813 INFO L225 Difference]: With dead ends: 395 [2020-10-14 00:03:16,813 INFO L226 Difference]: Without dead ends: 326 [2020-10-14 00:03:16,815 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=828, Invalid=1334, Unknown=0, NotChecked=0, Total=2162 [2020-10-14 00:03:16,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2020-10-14 00:03:16,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 122. [2020-10-14 00:03:16,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-14 00:03:16,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 124 transitions. [2020-10-14 00:03:16,834 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 124 transitions. Word has length 115 [2020-10-14 00:03:16,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:03:16,835 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 124 transitions. [2020-10-14 00:03:16,835 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-14 00:03:16,835 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 124 transitions. [2020-10-14 00:03:16,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-10-14 00:03:16,837 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:03:16,837 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:03:16,837 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-14 00:03:16,837 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:03:16,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:03:16,838 INFO L82 PathProgramCache]: Analyzing trace with hash -567180740, now seen corresponding path program 16 times [2020-10-14 00:03:16,838 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:03:16,838 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1644689488] [2020-10-14 00:03:16,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:03:16,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:03:16,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:16,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:17,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:21,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:23,628 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:03:23,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 131 [2020-10-14 00:03:23,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 00:03:23,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6772 [2020-10-14 00:03:23,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:03:23,629 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:03:23,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-14 00:03:23,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 57 [2020-10-14 00:03:23,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-14 00:03:23,630 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:03:23,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:03:23,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:03:23,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:23,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:03:23,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:03:23,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:03:23,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 00:03:23,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:03:23,988 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:03:23,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:03:23,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:03:23,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:03:23,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:03:23,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2020-10-14 00:03:23,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:03:23,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:23,991 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:03:23,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 00:03:23,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:03:23,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 00:03:23,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:03:23,992 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:03:23,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:03:23,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 00:03:23,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:03:23,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 00:03:23,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-10-14 00:03:23,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:03:23,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:23,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:03:23,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 00:03:23,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:03:23,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 00:03:23,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:03:23,997 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:03:23,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:03:23,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 00:03:23,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:03:23,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:03:24,009 INFO L134 CoverageAnalysis]: Checked inductivity of 984 backedges. 4 proven. 484 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2020-10-14 00:03:24,010 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1644689488] [2020-10-14 00:03:24,010 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:03:24,010 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-14 00:03:24,010 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141966589] [2020-10-14 00:03:24,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-14 00:03:24,011 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:03:24,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-14 00:03:24,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-14 00:03:24,011 INFO L87 Difference]: Start difference. First operand 122 states and 124 transitions. Second operand 26 states. [2020-10-14 00:03:25,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:03:25,595 INFO L93 Difference]: Finished difference Result 411 states and 416 transitions. [2020-10-14 00:03:25,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-14 00:03:25,596 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 119 [2020-10-14 00:03:25,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:03:25,597 INFO L225 Difference]: With dead ends: 411 [2020-10-14 00:03:25,598 INFO L226 Difference]: Without dead ends: 340 [2020-10-14 00:03:25,599 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=900, Invalid=1452, Unknown=0, NotChecked=0, Total=2352 [2020-10-14 00:03:25,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2020-10-14 00:03:25,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 126. [2020-10-14 00:03:25,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-14 00:03:25,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 128 transitions. [2020-10-14 00:03:25,629 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 128 transitions. Word has length 119 [2020-10-14 00:03:25,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:03:25,630 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 128 transitions. [2020-10-14 00:03:25,630 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-14 00:03:25,630 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 128 transitions. [2020-10-14 00:03:25,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-14 00:03:25,632 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:03:25,632 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:03:25,632 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-14 00:03:25,632 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:03:25,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:03:25,633 INFO L82 PathProgramCache]: Analyzing trace with hash 585310904, now seen corresponding path program 17 times [2020-10-14 00:03:25,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:03:25,633 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [411227493] [2020-10-14 00:03:25,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:03:25,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:03:25,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:25,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:26,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:30,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:03:30,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-10-14 00:03:30,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 00:03:30,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-14 00:03:30,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:03:30,663 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:03:30,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-14 00:03:30,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 59 [2020-10-14 00:03:30,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-14 00:03:30,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:03:31,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:03:31,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:03:31,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:31,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:03:31,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:03:31,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:03:31,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 00:03:31,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:03:31,017 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:03:31,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:03:31,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:03:31,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:03:31,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:03:31,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-10-14 00:03:31,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:03:31,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:31,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:03:31,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 00:03:31,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:03:31,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 00:03:31,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:03:31,021 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:03:31,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:03:31,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 00:03:31,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:03:31,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:03:31,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-10-14 00:03:31,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:03:31,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:31,024 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:03:31,024 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 00:03:31,024 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:03:31,024 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 00:03:31,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:03:31,025 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:03:31,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:03:31,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 00:03:31,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:03:31,025 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:03:31,036 INFO L134 CoverageAnalysis]: Checked inductivity of 1074 backedges. 4 proven. 529 refuted. 0 times theorem prover too weak. 541 trivial. 0 not checked. [2020-10-14 00:03:31,037 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [411227493] [2020-10-14 00:03:31,037 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:03:31,037 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-14 00:03:31,037 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085610854] [2020-10-14 00:03:31,038 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-14 00:03:31,038 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:03:31,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-14 00:03:31,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-14 00:03:31,039 INFO L87 Difference]: Start difference. First operand 126 states and 128 transitions. Second operand 27 states. [2020-10-14 00:03:32,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:03:32,644 INFO L93 Difference]: Finished difference Result 427 states and 432 transitions. [2020-10-14 00:03:32,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-14 00:03:32,645 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 123 [2020-10-14 00:03:32,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:03:32,647 INFO L225 Difference]: With dead ends: 427 [2020-10-14 00:03:32,647 INFO L226 Difference]: Without dead ends: 354 [2020-10-14 00:03:32,648 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=975, Invalid=1575, Unknown=0, NotChecked=0, Total=2550 [2020-10-14 00:03:32,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2020-10-14 00:03:32,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 130. [2020-10-14 00:03:32,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-14 00:03:32,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 132 transitions. [2020-10-14 00:03:32,665 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 132 transitions. Word has length 123 [2020-10-14 00:03:32,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:03:32,665 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 132 transitions. [2020-10-14 00:03:32,665 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-14 00:03:32,665 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 132 transitions. [2020-10-14 00:03:32,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-10-14 00:03:32,667 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:03:32,667 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:03:32,667 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-14 00:03:32,667 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:03:32,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:03:32,667 INFO L82 PathProgramCache]: Analyzing trace with hash -652667596, now seen corresponding path program 18 times [2020-10-14 00:03:32,668 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:03:32,668 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1076725872] [2020-10-14 00:03:32,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:03:32,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:03:32,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:32,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:33,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:37,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:03:37,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 139 [2020-10-14 00:03:37,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 00:03:37,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-14 00:03:37,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:03:37,689 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:03:37,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-14 00:03:37,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-10-14 00:03:37,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-14 00:03:37,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:03:38,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:03:38,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:03:38,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:38,104 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:03:38,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:03:38,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:03:38,105 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 00:03:38,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:03:38,105 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:03:38,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:03:38,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:03:38,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:03:38,106 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:03:38,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-10-14 00:03:38,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:03:38,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:38,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:03:38,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 00:03:38,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:03:38,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 00:03:38,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:03:38,109 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:03:38,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:03:38,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 00:03:38,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:03:38,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:03:38,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2020-10-14 00:03:38,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:03:38,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:38,112 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:03:38,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 00:03:38,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:03:38,113 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 00:03:38,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:03:38,113 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:03:38,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:03:38,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 00:03:38,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:03:38,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:03:38,149 INFO L134 CoverageAnalysis]: Checked inductivity of 1168 backedges. 4 proven. 576 refuted. 0 times theorem prover too weak. 588 trivial. 0 not checked. [2020-10-14 00:03:38,150 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1076725872] [2020-10-14 00:03:38,150 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:03:38,150 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-14 00:03:38,150 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074836138] [2020-10-14 00:03:38,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-14 00:03:38,150 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:03:38,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-14 00:03:38,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-14 00:03:38,151 INFO L87 Difference]: Start difference. First operand 130 states and 132 transitions. Second operand 28 states. [2020-10-14 00:03:39,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:03:39,869 INFO L93 Difference]: Finished difference Result 443 states and 448 transitions. [2020-10-14 00:03:39,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-14 00:03:39,870 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 127 [2020-10-14 00:03:39,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:03:39,872 INFO L225 Difference]: With dead ends: 443 [2020-10-14 00:03:39,872 INFO L226 Difference]: Without dead ends: 368 [2020-10-14 00:03:39,873 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1053, Invalid=1703, Unknown=0, NotChecked=0, Total=2756 [2020-10-14 00:03:39,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2020-10-14 00:03:39,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 134. [2020-10-14 00:03:39,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-14 00:03:39,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 136 transitions. [2020-10-14 00:03:39,900 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 136 transitions. Word has length 127 [2020-10-14 00:03:39,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:03:39,903 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 136 transitions. [2020-10-14 00:03:39,903 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-14 00:03:39,903 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 136 transitions. [2020-10-14 00:03:39,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-10-14 00:03:39,905 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:03:39,905 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:03:39,905 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-14 00:03:39,905 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:03:39,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:03:39,905 INFO L82 PathProgramCache]: Analyzing trace with hash 98458032, now seen corresponding path program 19 times [2020-10-14 00:03:39,906 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:03:39,906 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [78338878] [2020-10-14 00:03:39,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:03:39,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:03:39,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:39,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:41,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:44,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:53,060 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:03:53,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 143 [2020-10-14 00:03:53,061 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 00:03:53,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13133 [2020-10-14 00:03:53,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:03:53,061 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:03:53,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-14 00:03:53,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 00:03:53,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-14 00:03:53,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:03:53,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:03:53,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:03:53,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:53,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:03:53,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:03:53,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:03:53,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 00:03:53,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:03:53,468 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:03:53,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:03:53,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:03:53,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:03:53,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:03:53,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2020-10-14 00:03:53,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:03:53,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:53,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:03:53,472 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 00:03:53,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:03:53,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 00:03:53,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:03:53,472 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:03:53,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:03:53,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 00:03:53,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:03:53,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:03:53,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2020-10-14 00:03:53,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:03:53,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:53,476 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:03:53,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 00:03:53,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:03:53,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 00:03:53,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:03:53,476 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:03:53,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:03:53,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 00:03:53,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:03:53,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:03:53,485 INFO L134 CoverageAnalysis]: Checked inductivity of 1266 backedges. 4 proven. 625 refuted. 0 times theorem prover too weak. 637 trivial. 0 not checked. [2020-10-14 00:03:53,485 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [78338878] [2020-10-14 00:03:53,486 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:03:53,486 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-14 00:03:53,486 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047379103] [2020-10-14 00:03:53,486 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-14 00:03:53,487 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:03:53,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-14 00:03:53,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-14 00:03:53,487 INFO L87 Difference]: Start difference. First operand 134 states and 136 transitions. Second operand 29 states. [2020-10-14 00:03:55,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:03:55,334 INFO L93 Difference]: Finished difference Result 459 states and 464 transitions. [2020-10-14 00:03:55,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-14 00:03:55,335 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 131 [2020-10-14 00:03:55,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:03:55,337 INFO L225 Difference]: With dead ends: 459 [2020-10-14 00:03:55,337 INFO L226 Difference]: Without dead ends: 382 [2020-10-14 00:03:55,339 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1134, Invalid=1836, Unknown=0, NotChecked=0, Total=2970 [2020-10-14 00:03:55,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2020-10-14 00:03:55,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 138. [2020-10-14 00:03:55,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-14 00:03:55,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 140 transitions. [2020-10-14 00:03:55,357 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 140 transitions. Word has length 131 [2020-10-14 00:03:55,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:03:55,358 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 140 transitions. [2020-10-14 00:03:55,358 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-14 00:03:55,358 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 140 transitions. [2020-10-14 00:03:55,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-10-14 00:03:55,360 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:03:55,360 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:03:55,360 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-14 00:03:55,360 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:03:55,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:03:55,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1606283308, now seen corresponding path program 20 times [2020-10-14 00:03:55,361 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:03:55,361 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [122004375] [2020-10-14 00:03:55,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:03:55,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:03:55,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:55,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:03:57,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:00,701 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:04:00,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 147 [2020-10-14 00:04:00,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 00:04:00,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5321 [2020-10-14 00:04:00,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:04:00,702 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:04:00,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-14 00:04:00,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 00:04:00,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-14 00:04:00,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:04:01,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:04:01,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:04:01,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:01,131 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:04:01,131 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:04:01,131 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:04:01,131 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 00:04:01,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:04:01,131 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:04:01,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:04:01,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:04:01,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:04:01,132 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:04:01,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2020-10-14 00:04:01,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:04:01,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:01,134 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:04:01,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 00:04:01,134 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:04:01,134 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 00:04:01,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:04:01,135 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:04:01,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:04:01,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 00:04:01,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:04:01,135 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:04:01,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2020-10-14 00:04:01,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:04:01,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:01,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:04:01,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 00:04:01,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:04:01,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 00:04:01,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:04:01,138 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:04:01,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:04:01,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 00:04:01,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:04:01,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:04:01,147 INFO L134 CoverageAnalysis]: Checked inductivity of 1368 backedges. 4 proven. 676 refuted. 0 times theorem prover too weak. 688 trivial. 0 not checked. [2020-10-14 00:04:01,147 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [122004375] [2020-10-14 00:04:01,147 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:04:01,148 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-14 00:04:01,148 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097958912] [2020-10-14 00:04:01,148 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-14 00:04:01,148 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:04:01,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-14 00:04:01,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-14 00:04:01,149 INFO L87 Difference]: Start difference. First operand 138 states and 140 transitions. Second operand 30 states. [2020-10-14 00:04:03,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:04:03,463 INFO L93 Difference]: Finished difference Result 475 states and 480 transitions. [2020-10-14 00:04:03,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-14 00:04:03,464 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 135 [2020-10-14 00:04:03,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:04:03,466 INFO L225 Difference]: With dead ends: 475 [2020-10-14 00:04:03,466 INFO L226 Difference]: Without dead ends: 396 [2020-10-14 00:04:03,467 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1218, Invalid=1974, Unknown=0, NotChecked=0, Total=3192 [2020-10-14 00:04:03,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2020-10-14 00:04:03,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 142. [2020-10-14 00:04:03,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-14 00:04:03,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 144 transitions. [2020-10-14 00:04:03,487 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 144 transitions. Word has length 135 [2020-10-14 00:04:03,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:04:03,487 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 144 transitions. [2020-10-14 00:04:03,487 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-14 00:04:03,487 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 144 transitions. [2020-10-14 00:04:03,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-10-14 00:04:03,489 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:04:03,489 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:04:03,489 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-14 00:04:03,489 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:04:03,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:04:03,490 INFO L82 PathProgramCache]: Analyzing trace with hash -826091352, now seen corresponding path program 21 times [2020-10-14 00:04:03,490 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:04:03,490 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1504346464] [2020-10-14 00:04:03,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:04:03,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:04:03,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:03,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:05,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:09,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:04:09,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 151 [2020-10-14 00:04:09,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 00:04:09,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5661 [2020-10-14 00:04:09,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:04:09,172 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:04:09,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-14 00:04:09,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 67 [2020-10-14 00:04:09,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-14 00:04:09,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:04:09,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:04:09,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:04:09,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:09,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:04:09,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:04:09,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:04:09,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 00:04:09,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:04:09,646 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:04:09,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:04:09,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:04:09,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:04:09,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:04:09,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2020-10-14 00:04:09,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:04:09,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:09,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:04:09,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 00:04:09,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:04:09,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 00:04:09,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:04:09,650 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:04:09,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:04:09,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 00:04:09,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:04:09,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:04:09,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2020-10-14 00:04:09,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:04:09,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:09,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:04:09,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 00:04:09,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:04:09,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 00:04:09,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:04:09,653 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:04:09,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:04:09,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 00:04:09,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:04:09,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:04:09,666 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 4 proven. 729 refuted. 0 times theorem prover too weak. 741 trivial. 0 not checked. [2020-10-14 00:04:09,666 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1504346464] [2020-10-14 00:04:09,667 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:04:09,667 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-14 00:04:09,667 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755013160] [2020-10-14 00:04:09,667 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-14 00:04:09,667 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:04:09,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-14 00:04:09,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-14 00:04:09,668 INFO L87 Difference]: Start difference. First operand 142 states and 144 transitions. Second operand 31 states. [2020-10-14 00:04:11,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:04:11,689 INFO L93 Difference]: Finished difference Result 491 states and 496 transitions. [2020-10-14 00:04:11,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-10-14 00:04:11,690 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 139 [2020-10-14 00:04:11,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:04:11,692 INFO L225 Difference]: With dead ends: 491 [2020-10-14 00:04:11,692 INFO L226 Difference]: Without dead ends: 410 [2020-10-14 00:04:11,694 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1305, Invalid=2117, Unknown=0, NotChecked=0, Total=3422 [2020-10-14 00:04:11,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2020-10-14 00:04:11,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 146. [2020-10-14 00:04:11,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-14 00:04:11,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 148 transitions. [2020-10-14 00:04:11,718 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 148 transitions. Word has length 139 [2020-10-14 00:04:11,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:04:11,718 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 148 transitions. [2020-10-14 00:04:11,718 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-14 00:04:11,718 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 148 transitions. [2020-10-14 00:04:11,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-10-14 00:04:11,719 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:04:11,720 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:04:11,720 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-14 00:04:11,720 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:04:11,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:04:11,721 INFO L82 PathProgramCache]: Analyzing trace with hash -327675100, now seen corresponding path program 22 times [2020-10-14 00:04:11,721 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:04:11,721 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [899014319] [2020-10-14 00:04:11,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:04:11,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:04:11,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:11,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:13,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:19,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:04:19,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 155 [2020-10-14 00:04:19,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 00:04:19,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7724 [2020-10-14 00:04:19,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:04:19,469 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:04:19,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-14 00:04:19,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 00:04:19,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-14 00:04:19,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:04:19,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:04:19,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:04:19,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:19,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:04:19,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:04:19,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:04:19,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 00:04:19,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:04:19,972 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:04:19,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:04:19,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:04:19,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:04:19,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:04:19,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2020-10-14 00:04:19,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:04:19,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:19,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:04:19,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 00:04:19,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:04:19,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 00:04:19,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:04:19,975 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:04:19,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:04:19,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 00:04:19,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:04:19,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:04:19,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2020-10-14 00:04:19,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:04:19,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:19,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:04:19,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 00:04:19,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:04:19,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 00:04:19,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:04:19,978 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:04:19,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:04:19,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 00:04:19,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:04:19,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:04:19,988 INFO L134 CoverageAnalysis]: Checked inductivity of 1584 backedges. 4 proven. 784 refuted. 0 times theorem prover too weak. 796 trivial. 0 not checked. [2020-10-14 00:04:19,988 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [899014319] [2020-10-14 00:04:19,989 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:04:19,989 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-14 00:04:19,989 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397492286] [2020-10-14 00:04:19,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-14 00:04:19,990 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:04:19,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-14 00:04:19,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-14 00:04:19,991 INFO L87 Difference]: Start difference. First operand 146 states and 148 transitions. Second operand 32 states. [2020-10-14 00:04:22,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:04:22,135 INFO L93 Difference]: Finished difference Result 507 states and 512 transitions. [2020-10-14 00:04:22,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-10-14 00:04:22,136 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 143 [2020-10-14 00:04:22,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:04:22,138 INFO L225 Difference]: With dead ends: 507 [2020-10-14 00:04:22,139 INFO L226 Difference]: Without dead ends: 424 [2020-10-14 00:04:22,140 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1395, Invalid=2265, Unknown=0, NotChecked=0, Total=3660 [2020-10-14 00:04:22,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2020-10-14 00:04:22,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 150. [2020-10-14 00:04:22,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-10-14 00:04:22,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 152 transitions. [2020-10-14 00:04:22,160 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 152 transitions. Word has length 143 [2020-10-14 00:04:22,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:04:22,161 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 152 transitions. [2020-10-14 00:04:22,161 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-14 00:04:22,161 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 152 transitions. [2020-10-14 00:04:22,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-10-14 00:04:22,162 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:04:22,162 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:04:22,162 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-14 00:04:22,162 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:04:22,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:04:22,163 INFO L82 PathProgramCache]: Analyzing trace with hash -2081906784, now seen corresponding path program 23 times [2020-10-14 00:04:22,163 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:04:22,163 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1187166617] [2020-10-14 00:04:22,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:04:22,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:04:22,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:22,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:23,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:30,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:04:30,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 159 [2020-10-14 00:04:30,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 00:04:30,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8384 [2020-10-14 00:04:30,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:04:30,566 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:04:30,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-14 00:04:30,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 00:04:30,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-14 00:04:30,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:04:31,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 00:04:31,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:04:31,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:31,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:04:31,299 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 00:04:31,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:04:31,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 00:04:31,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:04:31,299 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:04:31,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:04:31,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 00:04:31,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:04:31,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:04:31,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2020-10-14 00:04:31,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:04:31,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:31,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:04:31,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 00:04:31,303 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:04:31,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 00:04:31,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:04:31,304 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:04:31,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:04:31,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 00:04:31,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:04:31,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:04:31,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2020-10-14 00:04:31,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:04:31,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:31,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 00:04:31,307 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 00:04:31,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 00:04:31,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 00:04:31,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 00:04:31,308 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 00:04:31,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 00:04:31,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 00:04:31,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 00:04:31,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 00:04:31,326 INFO L134 CoverageAnalysis]: Checked inductivity of 1698 backedges. 4 proven. 841 refuted. 0 times theorem prover too weak. 853 trivial. 0 not checked. [2020-10-14 00:04:31,326 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1187166617] [2020-10-14 00:04:31,326 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 00:04:31,326 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-14 00:04:31,327 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897860478] [2020-10-14 00:04:31,327 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-14 00:04:31,327 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 00:04:31,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-14 00:04:31,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 00:04:31,328 INFO L87 Difference]: Start difference. First operand 150 states and 152 transitions. Second operand 33 states. [2020-10-14 00:04:33,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 00:04:33,845 INFO L93 Difference]: Finished difference Result 523 states and 528 transitions. [2020-10-14 00:04:33,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-10-14 00:04:33,846 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 147 [2020-10-14 00:04:33,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 00:04:33,849 INFO L225 Difference]: With dead ends: 523 [2020-10-14 00:04:33,849 INFO L226 Difference]: Without dead ends: 438 [2020-10-14 00:04:33,855 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1488, Invalid=2418, Unknown=0, NotChecked=0, Total=3906 [2020-10-14 00:04:33,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2020-10-14 00:04:33,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 154. [2020-10-14 00:04:33,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-14 00:04:33,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 156 transitions. [2020-10-14 00:04:33,897 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 156 transitions. Word has length 147 [2020-10-14 00:04:33,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 00:04:33,898 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 156 transitions. [2020-10-14 00:04:33,898 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-14 00:04:33,898 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 156 transitions. [2020-10-14 00:04:33,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-10-14 00:04:33,899 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 00:04:33,900 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 00:04:33,900 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-14 00:04:33,900 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 00:04:33,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 00:04:33,901 INFO L82 PathProgramCache]: Analyzing trace with hash 295665180, now seen corresponding path program 24 times [2020-10-14 00:04:33,901 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 00:04:33,901 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [911513503] [2020-10-14 00:04:33,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 00:04:33,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 00:04:33,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:34,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 00:04:36,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking...