/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/loop-lit/gj2007.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 05:20:38,499 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 05:20:38,503 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 05:20:38,546 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 05:20:38,547 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 05:20:38,559 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 05:20:38,561 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 05:20:38,564 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 05:20:38,567 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 05:20:38,571 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 05:20:38,572 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 05:20:38,573 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 05:20:38,573 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 05:20:38,576 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 05:20:38,579 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 05:20:38,580 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 05:20:38,582 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 05:20:38,584 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 05:20:38,585 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 05:20:38,591 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 05:20:38,593 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 05:20:38,595 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 05:20:38,596 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 05:20:38,597 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 05:20:38,600 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 05:20:38,600 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 05:20:38,600 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 05:20:38,603 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 05:20:38,604 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 05:20:38,605 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 05:20:38,605 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 05:20:38,606 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 05:20:38,606 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 05:20:38,608 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 05:20:38,609 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 05:20:38,609 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 05:20:38,610 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 05:20:38,610 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 05:20:38,610 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 05:20:38,613 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 05:20:38,614 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 05:20:38,615 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 05:20:38,660 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 05:20:38,660 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 05:20:38,663 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 05:20:38,663 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 05:20:38,663 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 05:20:38,663 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 05:20:38,664 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 05:20:38,664 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 05:20:38,664 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 05:20:38,664 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 05:20:38,665 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 05:20:38,666 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 05:20:38,666 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 05:20:38,666 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 05:20:38,667 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 05:20:38,667 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 05:20:38,667 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 05:20:38,667 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 05:20:38,667 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 05:20:38,668 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 05:20:38,668 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 05:20:38,668 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 05:20:38,668 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 05:20:38,668 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 05:20:38,669 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 05:20:38,669 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 05:20:38,669 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 05:20:38,669 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 05:20:38,669 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 05:20:38,670 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 05:20:38,976 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 05:20:38,989 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 05:20:38,992 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 05:20:38,994 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 05:20:38,994 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 05:20:38,995 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gj2007.i [2020-10-14 05:20:39,067 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cc49ab050/f06dbacdcb89438188b808b8aae3103d/FLAG38c2e2b62 [2020-10-14 05:20:39,514 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 05:20:39,515 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-lit/gj2007.i [2020-10-14 05:20:39,521 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cc49ab050/f06dbacdcb89438188b808b8aae3103d/FLAG38c2e2b62 [2020-10-14 05:20:39,925 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cc49ab050/f06dbacdcb89438188b808b8aae3103d [2020-10-14 05:20:39,935 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 05:20:39,937 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 05:20:39,938 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 05:20:39,939 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 05:20:39,942 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 05:20:39,943 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:20:39" (1/1) ... [2020-10-14 05:20:39,946 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@770ea115 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:20:39, skipping insertion in model container [2020-10-14 05:20:39,946 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:20:39" (1/1) ... [2020-10-14 05:20:39,954 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 05:20:39,974 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 05:20:40,174 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 05:20:40,178 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 05:20:40,191 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 05:20:40,204 INFO L208 MainTranslator]: Completed translation [2020-10-14 05:20:40,204 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:20:40 WrapperNode [2020-10-14 05:20:40,205 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 05:20:40,205 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 05:20:40,206 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 05:20:40,206 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 05:20:40,217 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:20:40" (1/1) ... [2020-10-14 05:20:40,217 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:20:40" (1/1) ... [2020-10-14 05:20:40,303 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:20:40" (1/1) ... [2020-10-14 05:20:40,304 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:20:40" (1/1) ... [2020-10-14 05:20:40,308 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:20:40" (1/1) ... [2020-10-14 05:20:40,315 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:20:40" (1/1) ... [2020-10-14 05:20:40,316 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:20:40" (1/1) ... [2020-10-14 05:20:40,317 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 05:20:40,317 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 05:20:40,317 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 05:20:40,318 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 05:20:40,318 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:20:40" (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 05:20:40,371 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 05:20:40,371 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 05:20:40,371 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-14 05:20:40,372 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-14 05:20:40,372 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 05:20:40,372 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 05:20:40,372 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-14 05:20:40,372 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-14 05:20:40,372 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-14 05:20:40,372 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-14 05:20:40,372 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 05:20:40,373 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 05:20:40,373 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 05:20:40,548 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 05:20:40,549 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-14 05:20:40,553 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:20:40 BoogieIcfgContainer [2020-10-14 05:20:40,553 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 05:20:40,554 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 05:20:40,555 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 05:20:40,558 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 05:20:40,558 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 05:20:39" (1/3) ... [2020-10-14 05:20:40,559 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7124409b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:20:40, skipping insertion in model container [2020-10-14 05:20:40,560 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:20:40" (2/3) ... [2020-10-14 05:20:40,560 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7124409b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:20:40, skipping insertion in model container [2020-10-14 05:20:40,560 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:20:40" (3/3) ... [2020-10-14 05:20:40,562 INFO L109 eAbstractionObserver]: Analyzing ICFG gj2007.i [2020-10-14 05:20:40,573 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 05:20:40,580 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 05:20:40,602 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 05:20:40,647 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 05:20:40,647 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 05:20:40,647 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 05:20:40,648 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 05:20:40,648 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 05:20:40,648 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 05:20:40,648 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 05:20:40,649 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 05:20:40,676 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-10-14 05:20:40,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-14 05:20:40,684 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:20:40,685 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:20:40,686 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:20:40,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:20:40,693 INFO L82 PathProgramCache]: Analyzing trace with hash -64670033, now seen corresponding path program 1 times [2020-10-14 05:20:40,703 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:20:40,704 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [772300179] [2020-10-14 05:20:40,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:20:40,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:40,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:40,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:40,870 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-14 05:20:40,870 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:40,870 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 60 [2020-10-14 05:20:40,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:40,873 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:40,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 05:20:40,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:20:40,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 05:20:40,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-14 05:20:40,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:20:40,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:40,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:40,922 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:40,923 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:20:40,923 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:40,923 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 05:20:40,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:40,924 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:40,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:20:40,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:20:40,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:20:40,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:20:40,930 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 05:20:40,931 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [772300179] [2020-10-14 05:20:40,934 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:20:40,934 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-14 05:20:40,935 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381194460] [2020-10-14 05:20:40,941 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-14 05:20:40,941 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:20:40,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-14 05:20:40,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 05:20:40,960 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 3 states. [2020-10-14 05:20:41,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:20:41,012 INFO L93 Difference]: Finished difference Result 35 states and 45 transitions. [2020-10-14 05:20:41,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-14 05:20:41,014 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-10-14 05:20:41,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:20:41,023 INFO L225 Difference]: With dead ends: 35 [2020-10-14 05:20:41,024 INFO L226 Difference]: Without dead ends: 14 [2020-10-14 05:20:41,027 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 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 05:20:41,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-10-14 05:20:41,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-10-14 05:20:41,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-14 05:20:41,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-10-14 05:20:41,072 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2020-10-14 05:20:41,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:20:41,073 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-10-14 05:20:41,073 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-14 05:20:41,073 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-10-14 05:20:41,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-14 05:20:41,074 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:20:41,074 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:20:41,075 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 05:20:41,075 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:20:41,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:20:41,076 INFO L82 PathProgramCache]: Analyzing trace with hash -972579924, now seen corresponding path program 1 times [2020-10-14 05:20:41,076 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:20:41,076 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [827076665] [2020-10-14 05:20:41,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:20:41,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:41,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:41,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:41,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-14 05:20:41,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:41,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 78 [2020-10-14 05:20:41,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:41,173 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:41,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 05:20:41,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 05:20:41,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 05:20:41,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-14 05:20:41,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:20:41,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:41,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:41,208 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:41,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:20:41,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:41,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 05:20:41,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:41,211 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:41,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:20:41,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:20:41,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:20:41,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 05:20:41,215 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:20:41,216 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [827076665] [2020-10-14 05:20:41,216 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:20:41,216 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-14 05:20:41,217 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539282129] [2020-10-14 05:20:41,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-14 05:20:41,223 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:20:41,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-14 05:20:41,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 05:20:41,223 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 3 states. [2020-10-14 05:20:41,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:20:41,244 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2020-10-14 05:20:41,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-14 05:20:41,245 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-10-14 05:20:41,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:20:41,246 INFO L225 Difference]: With dead ends: 21 [2020-10-14 05:20:41,246 INFO L226 Difference]: Without dead ends: 16 [2020-10-14 05:20:41,248 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 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 05:20:41,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-14 05:20:41,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2020-10-14 05:20:41,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-14 05:20:41,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-10-14 05:20:41,253 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2020-10-14 05:20:41,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:20:41,254 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-10-14 05:20:41,254 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-14 05:20:41,254 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-10-14 05:20:41,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-14 05:20:41,255 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:20:41,255 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:20:41,256 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 05:20:41,256 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:20:41,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:20:41,256 INFO L82 PathProgramCache]: Analyzing trace with hash -1538365785, now seen corresponding path program 1 times [2020-10-14 05:20:41,257 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:20:41,257 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1680399920] [2020-10-14 05:20:41,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:20:41,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:41,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:41,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:41,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:41,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-14 05:20:41,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:20:41,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 82 [2020-10-14 05:20:41,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:41,354 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:41,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 05:20:41,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:20:41,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-14 05:20:41,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-14 05:20:41,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:20:41,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:41,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:41,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:41,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:20:41,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:41,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-14 05:20:41,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:41,416 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:41,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:20:41,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:20:41,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:20:41,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-14 05:20:41,425 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:20:41,426 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1680399920] [2020-10-14 05:20:41,426 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:20:41,426 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-14 05:20:41,427 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723055219] [2020-10-14 05:20:41,427 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 05:20:41,428 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:20:41,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 05:20:41,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-14 05:20:41,431 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 4 states. [2020-10-14 05:20:41,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:20:41,458 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2020-10-14 05:20:41,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 05:20:41,458 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-10-14 05:20:41,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:20:41,459 INFO L225 Difference]: With dead ends: 25 [2020-10-14 05:20:41,460 INFO L226 Difference]: Without dead ends: 17 [2020-10-14 05:20:41,460 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-14 05:20:41,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-14 05:20:41,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-10-14 05:20:41,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-14 05:20:41,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-10-14 05:20:41,466 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 14 [2020-10-14 05:20:41,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:20:41,466 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-10-14 05:20:41,466 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 05:20:41,467 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-10-14 05:20:41,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-14 05:20:41,467 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:20:41,467 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:20:41,468 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 05:20:41,468 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:20:41,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:20:41,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1011615012, now seen corresponding path program 2 times [2020-10-14 05:20:41,469 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:20:41,469 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [58560325] [2020-10-14 05:20:41,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:20:41,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:41,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:41,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:41,606 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:41,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-14 05:20:41,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:20:41,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 126 [2020-10-14 05:20:41,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:41,607 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:41,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 05:20:41,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:20:41,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-14 05:20:41,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:20:41,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:20:41,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:41,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:41,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:41,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:20:41,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:41,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:20:41,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:41,647 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:41,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:20:41,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:20:41,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:20:41,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:20:41,653 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:20:41,653 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [58560325] [2020-10-14 05:20:41,654 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:20:41,654 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 05:20:41,654 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700950200] [2020-10-14 05:20:41,657 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 05:20:41,658 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:20:41,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 05:20:41,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:20:41,659 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 5 states. [2020-10-14 05:20:41,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:20:41,719 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2020-10-14 05:20:41,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 05:20:41,723 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-10-14 05:20:41,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:20:41,724 INFO L225 Difference]: With dead ends: 27 [2020-10-14 05:20:41,724 INFO L226 Difference]: Without dead ends: 19 [2020-10-14 05:20:41,725 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:20:41,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-14 05:20:41,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-14 05:20:41,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-14 05:20:41,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-10-14 05:20:41,735 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 16 [2020-10-14 05:20:41,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:20:41,738 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-10-14 05:20:41,738 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 05:20:41,739 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-10-14 05:20:41,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-14 05:20:41,739 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:20:41,740 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:20:41,740 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 05:20:41,740 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:20:41,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:20:41,741 INFO L82 PathProgramCache]: Analyzing trace with hash -883165087, now seen corresponding path program 3 times [2020-10-14 05:20:41,742 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:20:41,743 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1176968929] [2020-10-14 05:20:41,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:20:41,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:41,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:41,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:41,853 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:41,854 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-14 05:20:41,854 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:20:41,854 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 102 [2020-10-14 05:20:41,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:41,855 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:41,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 05:20:41,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 05:20:41,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-14 05:20:41,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:20:41,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:20:41,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:41,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:41,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:41,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:20:41,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:41,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:20:41,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:41,875 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:41,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:20:41,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:20:41,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:20:41,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:20:41,878 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-14 05:20:41,878 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1176968929] [2020-10-14 05:20:41,878 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:20:41,878 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-14 05:20:41,879 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787759034] [2020-10-14 05:20:41,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 05:20:41,879 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:20:41,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 05:20:41,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-14 05:20:41,880 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 4 states. [2020-10-14 05:20:41,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:20:41,905 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2020-10-14 05:20:41,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 05:20:41,906 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-10-14 05:20:41,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:20:41,909 INFO L225 Difference]: With dead ends: 27 [2020-10-14 05:20:41,909 INFO L226 Difference]: Without dead ends: 22 [2020-10-14 05:20:41,909 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-14 05:20:41,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-14 05:20:41,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-10-14 05:20:41,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-14 05:20:41,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-10-14 05:20:41,916 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 18 [2020-10-14 05:20:41,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:20:41,916 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-10-14 05:20:41,917 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 05:20:41,917 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-10-14 05:20:41,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-14 05:20:41,917 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:20:41,918 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:20:41,918 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 05:20:41,918 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:20:41,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:20:41,918 INFO L82 PathProgramCache]: Analyzing trace with hash -1510053348, now seen corresponding path program 4 times [2020-10-14 05:20:41,919 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:20:41,919 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2000303972] [2020-10-14 05:20:41,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:20:41,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:41,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:41,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:42,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:42,071 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-14 05:20:42,071 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:20:42,071 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 142 [2020-10-14 05:20:42,071 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:42,072 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:42,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 05:20:42,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:20:42,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-14 05:20:42,072 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:20:42,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:20:42,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:42,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:42,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:42,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:20:42,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:42,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:20:42,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:42,125 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:42,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:20:42,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:20:42,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:20:42,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 05:20:42,130 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 05:20:42,131 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2000303972] [2020-10-14 05:20:42,133 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:20:42,133 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 05:20:42,133 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389726720] [2020-10-14 05:20:42,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 05:20:42,136 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:20:42,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 05:20:42,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-14 05:20:42,137 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 6 states. [2020-10-14 05:20:42,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:20:42,178 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2020-10-14 05:20:42,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 05:20:42,178 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-10-14 05:20:42,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:20:42,179 INFO L225 Difference]: With dead ends: 33 [2020-10-14 05:20:42,179 INFO L226 Difference]: Without dead ends: 23 [2020-10-14 05:20:42,180 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-14 05:20:42,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-14 05:20:42,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-14 05:20:42,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-14 05:20:42,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-10-14 05:20:42,186 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 20 [2020-10-14 05:20:42,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:20:42,186 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-10-14 05:20:42,186 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 05:20:42,186 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-10-14 05:20:42,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-14 05:20:42,187 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:20:42,187 INFO L422 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:20:42,188 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 05:20:42,188 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:20:42,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:20:42,188 INFO L82 PathProgramCache]: Analyzing trace with hash 2033743577, now seen corresponding path program 5 times [2020-10-14 05:20:42,188 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:20:42,189 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1824946301] [2020-10-14 05:20:42,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:20:42,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:42,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:42,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:42,280 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:42,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-14 05:20:42,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:20:42,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 83 [2020-10-14 05:20:42,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:42,281 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:42,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 05:20:42,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-14 05:20:42,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 05:20:42,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:20:42,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:20:42,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:42,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:42,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:42,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:20:42,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:42,305 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:20:42,305 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:42,305 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:42,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:20:42,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:20:42,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:20:42,306 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:20:42,307 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-14 05:20:42,308 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1824946301] [2020-10-14 05:20:42,308 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:20:42,308 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 05:20:42,309 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964380779] [2020-10-14 05:20:42,309 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 05:20:42,309 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:20:42,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 05:20:42,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:20:42,310 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 5 states. [2020-10-14 05:20:42,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:20:42,339 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2020-10-14 05:20:42,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 05:20:42,340 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-10-14 05:20:42,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:20:42,341 INFO L225 Difference]: With dead ends: 31 [2020-10-14 05:20:42,341 INFO L226 Difference]: Without dead ends: 26 [2020-10-14 05:20:42,342 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:20:42,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-14 05:20:42,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2020-10-14 05:20:42,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-14 05:20:42,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-10-14 05:20:42,347 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 22 [2020-10-14 05:20:42,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:20:42,348 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-10-14 05:20:42,348 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 05:20:42,348 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-10-14 05:20:42,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-14 05:20:42,349 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:20:42,349 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:20:42,349 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 05:20:42,349 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:20:42,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:20:42,350 INFO L82 PathProgramCache]: Analyzing trace with hash 1320495764, now seen corresponding path program 6 times [2020-10-14 05:20:42,350 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:20:42,350 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [425652959] [2020-10-14 05:20:42,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:20:42,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:42,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:42,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:42,504 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:42,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-14 05:20:42,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:20:42,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 147 [2020-10-14 05:20:42,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:42,506 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:42,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 05:20:42,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:20:42,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-14 05:20:42,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:20:42,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:20:42,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:42,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:42,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:42,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:20:42,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:42,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:20:42,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:42,556 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:42,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:20:42,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:20:42,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:20:42,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:20:42,559 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 25 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-14 05:20:42,559 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [425652959] [2020-10-14 05:20:42,560 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:20:42,560 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 05:20:42,560 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317045434] [2020-10-14 05:20:42,561 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 05:20:42,561 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:20:42,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 05:20:42,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-14 05:20:42,562 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 7 states. [2020-10-14 05:20:42,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:20:42,598 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2020-10-14 05:20:42,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 05:20:42,599 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-10-14 05:20:42,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:20:42,600 INFO L225 Difference]: With dead ends: 39 [2020-10-14 05:20:42,600 INFO L226 Difference]: Without dead ends: 27 [2020-10-14 05:20:42,601 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-14 05:20:42,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-14 05:20:42,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-14 05:20:42,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-14 05:20:42,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-10-14 05:20:42,606 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 24 [2020-10-14 05:20:42,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:20:42,607 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-10-14 05:20:42,607 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 05:20:42,607 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-10-14 05:20:42,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-14 05:20:42,608 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:20:42,608 INFO L422 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:20:42,609 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 05:20:42,609 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:20:42,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:20:42,609 INFO L82 PathProgramCache]: Analyzing trace with hash -1469017903, now seen corresponding path program 7 times [2020-10-14 05:20:42,610 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:20:42,610 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [368090115] [2020-10-14 05:20:42,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:20:42,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:42,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:42,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:42,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:42,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-14 05:20:42,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:20:42,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 171 [2020-10-14 05:20:42,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:42,790 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:42,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 05:20:42,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:20:42,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-14 05:20:42,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:20:42,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:20:42,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:42,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:42,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:42,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:20:42,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:42,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:20:42,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:42,842 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:42,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:20:42,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:20:42,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:20:42,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:20:42,845 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-14 05:20:42,845 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [368090115] [2020-10-14 05:20:42,845 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:20:42,845 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 05:20:42,846 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118180132] [2020-10-14 05:20:42,846 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 05:20:42,846 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:20:42,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 05:20:42,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:20:42,847 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 8 states. [2020-10-14 05:20:42,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:20:42,886 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2020-10-14 05:20:42,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 05:20:42,887 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2020-10-14 05:20:42,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:20:42,887 INFO L225 Difference]: With dead ends: 41 [2020-10-14 05:20:42,888 INFO L226 Difference]: Without dead ends: 29 [2020-10-14 05:20:42,888 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:20:42,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-14 05:20:42,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-14 05:20:42,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-14 05:20:42,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2020-10-14 05:20:42,893 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 26 [2020-10-14 05:20:42,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:20:42,894 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2020-10-14 05:20:42,894 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 05:20:42,894 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2020-10-14 05:20:42,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-14 05:20:42,895 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:20:42,895 INFO L422 BasicCegarLoop]: trace histogram [9, 6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:20:42,895 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 05:20:42,895 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:20:42,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:20:42,896 INFO L82 PathProgramCache]: Analyzing trace with hash -2132059186, now seen corresponding path program 8 times [2020-10-14 05:20:42,896 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:20:42,896 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [28113738] [2020-10-14 05:20:42,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:20:42,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:42,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:42,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:43,024 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:43,024 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-14 05:20:43,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:20:43,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 121 [2020-10-14 05:20:43,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:43,025 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:43,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 05:20:43,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-14 05:20:43,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 05:20:43,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:20:43,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:20:43,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:43,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:43,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:43,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:20:43,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:43,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:20:43,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:43,056 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:43,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:20:43,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:20:43,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:20:43,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:20:43,058 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 42 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-14 05:20:43,059 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [28113738] [2020-10-14 05:20:43,059 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:20:43,059 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 05:20:43,059 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920114776] [2020-10-14 05:20:43,060 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 05:20:43,060 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:20:43,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 05:20:43,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-14 05:20:43,061 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 6 states. [2020-10-14 05:20:43,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:20:43,095 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2020-10-14 05:20:43,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 05:20:43,095 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2020-10-14 05:20:43,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:20:43,096 INFO L225 Difference]: With dead ends: 37 [2020-10-14 05:20:43,096 INFO L226 Difference]: Without dead ends: 32 [2020-10-14 05:20:43,097 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-14 05:20:43,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-14 05:20:43,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2020-10-14 05:20:43,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-14 05:20:43,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-10-14 05:20:43,102 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 28 [2020-10-14 05:20:43,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:20:43,103 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-10-14 05:20:43,103 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 05:20:43,103 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-10-14 05:20:43,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-14 05:20:43,104 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:20:43,104 INFO L422 BasicCegarLoop]: trace histogram [10, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:20:43,104 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 05:20:43,104 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:20:43,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:20:43,105 INFO L82 PathProgramCache]: Analyzing trace with hash 893560393, now seen corresponding path program 9 times [2020-10-14 05:20:43,105 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:20:43,106 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1779537929] [2020-10-14 05:20:43,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:20:43,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:43,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:43,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:43,456 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:43,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-14 05:20:43,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:20:43,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 342 [2020-10-14 05:20:43,457 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:43,457 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:43,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 05:20:43,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:20:43,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-14 05:20:43,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:20:43,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:20:43,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:43,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:43,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:43,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:20:43,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:43,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:20:43,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:43,533 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:43,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:20:43,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:20:43,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:20:43,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:20:43,538 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 49 proven. 42 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-14 05:20:43,538 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1779537929] [2020-10-14 05:20:43,538 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:20:43,538 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 05:20:43,539 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081326937] [2020-10-14 05:20:43,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 05:20:43,539 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:20:43,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 05:20:43,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-10-14 05:20:43,541 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 9 states. [2020-10-14 05:20:43,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:20:43,598 INFO L93 Difference]: Finished difference Result 47 states and 56 transitions. [2020-10-14 05:20:43,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 05:20:43,598 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 30 [2020-10-14 05:20:43,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:20:43,599 INFO L225 Difference]: With dead ends: 47 [2020-10-14 05:20:43,599 INFO L226 Difference]: Without dead ends: 33 [2020-10-14 05:20:43,600 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-10-14 05:20:43,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-14 05:20:43,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-10-14 05:20:43,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-14 05:20:43,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-10-14 05:20:43,613 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 30 [2020-10-14 05:20:43,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:20:43,613 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-10-14 05:20:43,614 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 05:20:43,614 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-10-14 05:20:43,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-14 05:20:43,615 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:20:43,615 INFO L422 BasicCegarLoop]: trace histogram [11, 7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:20:43,616 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 05:20:43,616 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:20:43,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:20:43,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1832233670, now seen corresponding path program 10 times [2020-10-14 05:20:43,617 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:20:43,618 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1212413135] [2020-10-14 05:20:43,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:20:43,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:43,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:43,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:43,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:43,925 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-14 05:20:43,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:20:43,928 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 296 [2020-10-14 05:20:43,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:43,928 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:43,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 05:20:43,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-14 05:20:43,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 05:20:43,929 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:20:43,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:20:43,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:43,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:43,979 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:43,980 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:20:43,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:43,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:20:43,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:43,981 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:43,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:20:43,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:20:43,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:20:43,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:20:43,984 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 63 proven. 16 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-10-14 05:20:43,985 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1212413135] [2020-10-14 05:20:43,985 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:20:43,985 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 05:20:43,986 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264381763] [2020-10-14 05:20:43,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 05:20:43,986 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:20:43,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 05:20:43,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-14 05:20:43,987 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 7 states. [2020-10-14 05:20:44,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:20:44,039 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2020-10-14 05:20:44,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 05:20:44,040 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 32 [2020-10-14 05:20:44,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:20:44,041 INFO L225 Difference]: With dead ends: 41 [2020-10-14 05:20:44,043 INFO L226 Difference]: Without dead ends: 36 [2020-10-14 05:20:44,044 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-14 05:20:44,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-14 05:20:44,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-10-14 05:20:44,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-14 05:20:44,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2020-10-14 05:20:44,051 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 32 [2020-10-14 05:20:44,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:20:44,051 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2020-10-14 05:20:44,051 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 05:20:44,052 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2020-10-14 05:20:44,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-14 05:20:44,053 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:20:44,054 INFO L422 BasicCegarLoop]: trace histogram [12, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:20:44,054 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 05:20:44,057 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:20:44,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:20:44,057 INFO L82 PathProgramCache]: Analyzing trace with hash 943003457, now seen corresponding path program 11 times [2020-10-14 05:20:44,057 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:20:44,058 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [626051211] [2020-10-14 05:20:44,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:20:44,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:44,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:44,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:44,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:44,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-14 05:20:44,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:20:44,488 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 419 [2020-10-14 05:20:44,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:44,489 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:44,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 05:20:44,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:20:44,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-14 05:20:44,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:20:44,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:20:44,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:44,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:44,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:44,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:20:44,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:44,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:20:44,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:44,574 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:44,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:20:44,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:20:44,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:20:44,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:20:44,578 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 72 proven. 56 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-14 05:20:44,579 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [626051211] [2020-10-14 05:20:44,579 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:20:44,579 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 05:20:44,579 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130762106] [2020-10-14 05:20:44,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 05:20:44,581 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:20:44,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 05:20:44,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-10-14 05:20:44,582 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand 10 states. [2020-10-14 05:20:44,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:20:44,626 INFO L93 Difference]: Finished difference Result 53 states and 64 transitions. [2020-10-14 05:20:44,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 05:20:44,627 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2020-10-14 05:20:44,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:20:44,628 INFO L225 Difference]: With dead ends: 53 [2020-10-14 05:20:44,629 INFO L226 Difference]: Without dead ends: 37 [2020-10-14 05:20:44,629 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-10-14 05:20:44,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-14 05:20:44,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-10-14 05:20:44,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-14 05:20:44,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2020-10-14 05:20:44,641 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 34 [2020-10-14 05:20:44,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:20:44,641 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2020-10-14 05:20:44,642 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 05:20:44,642 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2020-10-14 05:20:44,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-14 05:20:44,645 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:20:44,645 INFO L422 BasicCegarLoop]: trace histogram [13, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:20:44,645 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 05:20:44,645 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:20:44,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:20:44,646 INFO L82 PathProgramCache]: Analyzing trace with hash 2112329022, now seen corresponding path program 12 times [2020-10-14 05:20:44,646 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:20:44,647 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1430093720] [2020-10-14 05:20:44,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:20:44,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:44,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:44,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:45,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:45,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-14 05:20:45,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:20:45,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 544 [2020-10-14 05:20:45,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:45,201 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:45,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 05:20:45,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-14 05:20:45,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 05:20:45,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:20:45,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:20:45,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:45,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:45,250 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:45,250 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:20:45,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:45,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:20:45,252 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:45,252 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:45,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:20:45,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:20:45,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:20:45,253 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:20:45,255 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 88 proven. 25 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-10-14 05:20:45,256 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1430093720] [2020-10-14 05:20:45,256 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:20:45,256 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 05:20:45,256 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493890939] [2020-10-14 05:20:45,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 05:20:45,257 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:20:45,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 05:20:45,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:20:45,258 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand 8 states. [2020-10-14 05:20:45,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:20:45,310 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2020-10-14 05:20:45,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 05:20:45,310 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 36 [2020-10-14 05:20:45,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:20:45,311 INFO L225 Difference]: With dead ends: 45 [2020-10-14 05:20:45,311 INFO L226 Difference]: Without dead ends: 40 [2020-10-14 05:20:45,312 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:20:45,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-14 05:20:45,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-10-14 05:20:45,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-14 05:20:45,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2020-10-14 05:20:45,322 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 36 [2020-10-14 05:20:45,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:20:45,325 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2020-10-14 05:20:45,325 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 05:20:45,326 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2020-10-14 05:20:45,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-14 05:20:45,326 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:20:45,327 INFO L422 BasicCegarLoop]: trace histogram [14, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:20:45,327 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 05:20:45,327 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:20:45,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:20:45,327 INFO L82 PathProgramCache]: Analyzing trace with hash -468302919, now seen corresponding path program 13 times [2020-10-14 05:20:45,328 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:20:45,328 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [744270386] [2020-10-14 05:20:45,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:20:45,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:45,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:45,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:45,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:45,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-14 05:20:45,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:20:45,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 595 [2020-10-14 05:20:45,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:45,933 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:45,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 05:20:45,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:20:45,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-14 05:20:45,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:20:46,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:20:46,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:46,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:46,027 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:46,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:20:46,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:46,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 05:20:46,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:46,028 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:46,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:20:46,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:20:46,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:20:46,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-14 05:20:46,035 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 99 proven. 72 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-14 05:20:46,036 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [744270386] [2020-10-14 05:20:46,036 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:20:46,036 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 05:20:46,037 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647264391] [2020-10-14 05:20:46,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 05:20:46,037 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:20:46,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 05:20:46,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-10-14 05:20:46,039 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand 11 states. [2020-10-14 05:20:46,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:20:46,081 INFO L93 Difference]: Finished difference Result 59 states and 72 transitions. [2020-10-14 05:20:46,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 05:20:46,081 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 38 [2020-10-14 05:20:46,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:20:46,082 INFO L225 Difference]: With dead ends: 59 [2020-10-14 05:20:46,082 INFO L226 Difference]: Without dead ends: 41 [2020-10-14 05:20:46,085 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-10-14 05:20:46,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-14 05:20:46,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-10-14 05:20:46,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-14 05:20:46,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2020-10-14 05:20:46,094 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 38 [2020-10-14 05:20:46,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:20:46,095 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2020-10-14 05:20:46,095 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 05:20:46,095 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2020-10-14 05:20:46,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-14 05:20:46,098 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:20:46,098 INFO L422 BasicCegarLoop]: trace histogram [15, 9, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:20:46,098 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 05:20:46,098 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:20:46,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:20:46,099 INFO L82 PathProgramCache]: Analyzing trace with hash -265323722, now seen corresponding path program 14 times [2020-10-14 05:20:46,099 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:20:46,099 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [509021953] [2020-10-14 05:20:46,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:20:46,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:46,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:46,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:46,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:46,857 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-14 05:20:46,857 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:20:46,857 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 749 [2020-10-14 05:20:46,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:46,858 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:46,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 05:20:46,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:20:46,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-14 05:20:46,858 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:20:46,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:20:46,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:46,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:46,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:46,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:20:46,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:46,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:20:46,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:46,959 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:46,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:20:46,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:20:46,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:20:46,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:20:46,962 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 110 proven. 90 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-14 05:20:46,962 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [509021953] [2020-10-14 05:20:46,962 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:20:46,963 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 05:20:46,963 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780970680] [2020-10-14 05:20:46,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 05:20:46,963 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:20:46,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 05:20:46,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-10-14 05:20:46,964 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand 12 states. [2020-10-14 05:20:47,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:20:47,024 INFO L93 Difference]: Finished difference Result 61 states and 74 transitions. [2020-10-14 05:20:47,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 05:20:47,024 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 40 [2020-10-14 05:20:47,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:20:47,025 INFO L225 Difference]: With dead ends: 61 [2020-10-14 05:20:47,025 INFO L226 Difference]: Without dead ends: 43 [2020-10-14 05:20:47,026 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-10-14 05:20:47,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-14 05:20:47,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-10-14 05:20:47,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-14 05:20:47,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2020-10-14 05:20:47,031 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 40 [2020-10-14 05:20:47,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:20:47,031 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2020-10-14 05:20:47,031 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 05:20:47,031 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2020-10-14 05:20:47,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-14 05:20:47,032 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:20:47,032 INFO L422 BasicCegarLoop]: trace histogram [16, 10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:20:47,032 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 05:20:47,032 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:20:47,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:20:47,033 INFO L82 PathProgramCache]: Analyzing trace with hash 1524156275, now seen corresponding path program 15 times [2020-10-14 05:20:47,033 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:20:47,033 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1808651798] [2020-10-14 05:20:47,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:20:47,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:47,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:47,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:47,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:47,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-14 05:20:47,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:20:47,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 619 [2020-10-14 05:20:47,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:47,661 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:47,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 05:20:47,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-14 05:20:47,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-14 05:20:47,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:20:47,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:20:47,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:47,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:47,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:47,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:20:47,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:47,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:20:47,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:47,728 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:47,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:20:47,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:20:47,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:20:47,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:20:47,743 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 130 proven. 36 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2020-10-14 05:20:47,743 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1808651798] [2020-10-14 05:20:47,743 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:20:47,744 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 05:20:47,744 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143707417] [2020-10-14 05:20:47,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 05:20:47,745 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:20:47,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 05:20:47,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-10-14 05:20:47,745 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand 9 states. [2020-10-14 05:20:47,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:20:47,796 INFO L93 Difference]: Finished difference Result 51 states and 59 transitions. [2020-10-14 05:20:47,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 05:20:47,796 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 42 [2020-10-14 05:20:47,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:20:47,797 INFO L225 Difference]: With dead ends: 51 [2020-10-14 05:20:47,797 INFO L226 Difference]: Without dead ends: 46 [2020-10-14 05:20:47,798 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-10-14 05:20:47,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-14 05:20:47,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-10-14 05:20:47,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-14 05:20:47,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2020-10-14 05:20:47,803 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 42 [2020-10-14 05:20:47,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:20:47,803 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2020-10-14 05:20:47,803 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 05:20:47,803 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2020-10-14 05:20:47,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-14 05:20:47,804 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:20:47,804 INFO L422 BasicCegarLoop]: trace histogram [17, 10, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:20:47,805 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 05:20:47,805 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:20:47,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:20:47,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1233370286, now seen corresponding path program 16 times [2020-10-14 05:20:47,805 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:20:47,806 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1052644680] [2020-10-14 05:20:47,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:20:47,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:47,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:47,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:48,430 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:48,430 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-14 05:20:48,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:20:48,431 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 617 [2020-10-14 05:20:48,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:48,431 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:48,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 05:20:48,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:20:48,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-14 05:20:48,432 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:20:48,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:20:48,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:48,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:48,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:48,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:20:48,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:48,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:20:48,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:48,546 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:48,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:20:48,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:20:48,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:20:48,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:20:48,550 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 143 proven. 110 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-14 05:20:48,551 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1052644680] [2020-10-14 05:20:48,551 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:20:48,551 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 05:20:48,555 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506996036] [2020-10-14 05:20:48,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 05:20:48,556 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:20:48,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 05:20:48,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-10-14 05:20:48,556 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand 13 states. [2020-10-14 05:20:48,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:20:48,607 INFO L93 Difference]: Finished difference Result 67 states and 82 transitions. [2020-10-14 05:20:48,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 05:20:48,608 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 44 [2020-10-14 05:20:48,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:20:48,609 INFO L225 Difference]: With dead ends: 67 [2020-10-14 05:20:48,609 INFO L226 Difference]: Without dead ends: 47 [2020-10-14 05:20:48,609 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-10-14 05:20:48,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-14 05:20:48,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-10-14 05:20:48,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-14 05:20:48,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2020-10-14 05:20:48,621 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 44 [2020-10-14 05:20:48,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:20:48,621 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2020-10-14 05:20:48,621 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 05:20:48,621 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2020-10-14 05:20:48,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-14 05:20:48,624 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:20:48,624 INFO L422 BasicCegarLoop]: trace histogram [18, 11, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:20:48,625 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-14 05:20:48,625 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:20:48,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:20:48,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1778557547, now seen corresponding path program 17 times [2020-10-14 05:20:48,625 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:20:48,626 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1228966716] [2020-10-14 05:20:48,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:20:48,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:48,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:48,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:49,369 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:49,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-14 05:20:49,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:20:49,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 736 [2020-10-14 05:20:49,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:49,371 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:49,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 05:20:49,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-14 05:20:49,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 05:20:49,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:20:49,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:20:49,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:49,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:49,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:49,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:20:49,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:49,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:20:49,464 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:49,464 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:49,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:20:49,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:20:49,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:20:49,465 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:20:49,471 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 165 proven. 49 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-10-14 05:20:49,472 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1228966716] [2020-10-14 05:20:49,472 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:20:49,472 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 05:20:49,473 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907039720] [2020-10-14 05:20:49,475 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 05:20:49,475 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:20:49,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 05:20:49,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-10-14 05:20:49,476 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand 10 states. [2020-10-14 05:20:49,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:20:49,547 INFO L93 Difference]: Finished difference Result 55 states and 64 transitions. [2020-10-14 05:20:49,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 05:20:49,548 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 46 [2020-10-14 05:20:49,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:20:49,548 INFO L225 Difference]: With dead ends: 55 [2020-10-14 05:20:49,548 INFO L226 Difference]: Without dead ends: 50 [2020-10-14 05:20:49,549 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-10-14 05:20:49,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-14 05:20:49,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2020-10-14 05:20:49,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-14 05:20:49,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2020-10-14 05:20:49,557 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 46 [2020-10-14 05:20:49,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:20:49,557 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2020-10-14 05:20:49,557 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 05:20:49,557 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2020-10-14 05:20:49,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-14 05:20:49,560 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:20:49,560 INFO L422 BasicCegarLoop]: trace histogram [19, 11, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:20:49,562 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-14 05:20:49,562 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:20:49,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:20:49,563 INFO L82 PathProgramCache]: Analyzing trace with hash 899856806, now seen corresponding path program 18 times [2020-10-14 05:20:49,563 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:20:49,564 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1608960667] [2020-10-14 05:20:49,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:20:49,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:49,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:49,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:50,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:50,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-14 05:20:50,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:20:50,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 751 [2020-10-14 05:20:50,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:50,330 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:50,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 05:20:50,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:20:50,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-14 05:20:50,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:20:50,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:20:50,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:50,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:50,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:50,465 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:20:50,465 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:50,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:20:50,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:50,466 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:50,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:20:50,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:20:50,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:20:50,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:20:50,471 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 180 proven. 132 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-14 05:20:50,472 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1608960667] [2020-10-14 05:20:50,472 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:20:50,472 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 05:20:50,472 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188030621] [2020-10-14 05:20:50,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 05:20:50,473 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:20:50,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 05:20:50,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-10-14 05:20:50,473 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand 14 states. [2020-10-14 05:20:50,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:20:50,534 INFO L93 Difference]: Finished difference Result 73 states and 90 transitions. [2020-10-14 05:20:50,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 05:20:50,534 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 48 [2020-10-14 05:20:50,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:20:50,535 INFO L225 Difference]: With dead ends: 73 [2020-10-14 05:20:50,535 INFO L226 Difference]: Without dead ends: 51 [2020-10-14 05:20:50,536 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-10-14 05:20:50,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-14 05:20:50,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-10-14 05:20:50,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-14 05:20:50,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2020-10-14 05:20:50,544 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 48 [2020-10-14 05:20:50,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:20:50,544 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2020-10-14 05:20:50,544 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 05:20:50,544 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2020-10-14 05:20:50,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-14 05:20:50,545 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:20:50,545 INFO L422 BasicCegarLoop]: trace histogram [20, 12, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:20:50,549 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-14 05:20:50,549 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:20:50,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:20:50,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1936819997, now seen corresponding path program 19 times [2020-10-14 05:20:50,549 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:20:50,550 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2130924179] [2020-10-14 05:20:50,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:20:50,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:50,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:50,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:51,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:51,400 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-14 05:20:51,400 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:20:51,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 841 [2020-10-14 05:20:51,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:51,401 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:51,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 05:20:51,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:20:51,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-14 05:20:51,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:20:51,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:20:51,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:51,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:51,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:51,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:20:51,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:51,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:20:51,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:51,547 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:51,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:20:51,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:20:51,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:20:51,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:20:51,554 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 195 proven. 156 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-14 05:20:51,555 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2130924179] [2020-10-14 05:20:51,555 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:20:51,555 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 05:20:51,556 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571134703] [2020-10-14 05:20:51,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 05:20:51,556 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:20:51,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 05:20:51,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-10-14 05:20:51,557 INFO L87 Difference]: Start difference. First operand 51 states and 59 transitions. Second operand 15 states. [2020-10-14 05:20:51,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:20:51,629 INFO L93 Difference]: Finished difference Result 75 states and 92 transitions. [2020-10-14 05:20:51,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 05:20:51,630 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 50 [2020-10-14 05:20:51,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:20:51,631 INFO L225 Difference]: With dead ends: 75 [2020-10-14 05:20:51,631 INFO L226 Difference]: Without dead ends: 53 [2020-10-14 05:20:51,632 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-10-14 05:20:51,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-14 05:20:51,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-10-14 05:20:51,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-14 05:20:51,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2020-10-14 05:20:51,636 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 50 [2020-10-14 05:20:51,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:20:51,636 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2020-10-14 05:20:51,636 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 05:20:51,636 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2020-10-14 05:20:51,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-14 05:20:51,637 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:20:51,637 INFO L422 BasicCegarLoop]: trace histogram [21, 13, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:20:51,637 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-14 05:20:51,637 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:20:51,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:20:51,638 INFO L82 PathProgramCache]: Analyzing trace with hash -678994720, now seen corresponding path program 20 times [2020-10-14 05:20:51,638 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:20:51,639 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1822237834] [2020-10-14 05:20:51,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:20:51,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:51,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:51,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:52,746 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:52,746 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-14 05:20:52,747 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:20:52,747 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1097 [2020-10-14 05:20:52,747 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:52,747 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:52,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 05:20:52,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-14 05:20:52,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 05:20:52,748 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:20:52,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:20:52,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:52,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:52,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:52,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:20:52,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:52,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:20:52,825 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:52,825 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:52,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:20:52,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:20:52,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:20:52,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:20:52,829 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 221 proven. 64 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2020-10-14 05:20:52,829 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1822237834] [2020-10-14 05:20:52,829 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:20:52,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 05:20:52,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740648871] [2020-10-14 05:20:52,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 05:20:52,830 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:20:52,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 05:20:52,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-10-14 05:20:52,831 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand 11 states. [2020-10-14 05:20:52,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:20:52,883 INFO L93 Difference]: Finished difference Result 61 states and 71 transitions. [2020-10-14 05:20:52,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 05:20:52,885 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 52 [2020-10-14 05:20:52,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:20:52,886 INFO L225 Difference]: With dead ends: 61 [2020-10-14 05:20:52,886 INFO L226 Difference]: Without dead ends: 56 [2020-10-14 05:20:52,886 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-10-14 05:20:52,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-14 05:20:52,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2020-10-14 05:20:52,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-14 05:20:52,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2020-10-14 05:20:52,893 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 52 [2020-10-14 05:20:52,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:20:52,894 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2020-10-14 05:20:52,894 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 05:20:52,894 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2020-10-14 05:20:52,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-14 05:20:52,895 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:20:52,895 INFO L422 BasicCegarLoop]: trace histogram [22, 13, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:20:52,895 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-14 05:20:52,895 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:20:52,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:20:52,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1424141019, now seen corresponding path program 21 times [2020-10-14 05:20:52,896 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:20:52,897 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1598816945] [2020-10-14 05:20:52,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:20:52,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:52,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:52,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:54,027 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:54,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-14 05:20:54,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:20:54,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1120 [2020-10-14 05:20:54,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:54,028 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:54,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 05:20:54,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:20:54,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-14 05:20:54,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:20:54,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:20:54,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:54,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:54,173 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:54,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:20:54,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:54,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:20:54,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:54,175 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:54,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:20:54,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:20:54,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:20:54,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:20:54,183 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 238 proven. 182 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-14 05:20:54,184 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1598816945] [2020-10-14 05:20:54,184 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:20:54,184 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 05:20:54,185 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084698461] [2020-10-14 05:20:54,185 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 05:20:54,185 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:20:54,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 05:20:54,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-10-14 05:20:54,186 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand 16 states. [2020-10-14 05:20:54,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:20:54,264 INFO L93 Difference]: Finished difference Result 81 states and 100 transitions. [2020-10-14 05:20:54,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 05:20:54,265 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 54 [2020-10-14 05:20:54,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:20:54,266 INFO L225 Difference]: With dead ends: 81 [2020-10-14 05:20:54,266 INFO L226 Difference]: Without dead ends: 57 [2020-10-14 05:20:54,267 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-10-14 05:20:54,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-14 05:20:54,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-10-14 05:20:54,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-14 05:20:54,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 66 transitions. [2020-10-14 05:20:54,270 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 66 transitions. Word has length 54 [2020-10-14 05:20:54,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:20:54,271 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 66 transitions. [2020-10-14 05:20:54,271 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 05:20:54,271 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 66 transitions. [2020-10-14 05:20:54,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-14 05:20:54,272 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:20:54,272 INFO L422 BasicCegarLoop]: trace histogram [23, 14, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:20:54,273 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-14 05:20:54,273 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:20:54,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:20:54,273 INFO L82 PathProgramCache]: Analyzing trace with hash -257996712, now seen corresponding path program 22 times [2020-10-14 05:20:54,274 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:20:54,274 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [451603209] [2020-10-14 05:20:54,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:20:54,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:54,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:54,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:55,519 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:55,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-14 05:20:55,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:20:55,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1237 [2020-10-14 05:20:55,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:55,521 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:55,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 05:20:55,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-10-14 05:20:55,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 05:20:55,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:20:55,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:20:55,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:55,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:55,601 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:55,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:20:55,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:55,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:20:55,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:55,602 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:55,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:20:55,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:20:55,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:20:55,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:20:55,607 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 266 proven. 81 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2020-10-14 05:20:55,608 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [451603209] [2020-10-14 05:20:55,608 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:20:55,608 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 05:20:55,609 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061176200] [2020-10-14 05:20:55,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 05:20:55,609 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:20:55,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 05:20:55,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-10-14 05:20:55,610 INFO L87 Difference]: Start difference. First operand 57 states and 66 transitions. Second operand 12 states. [2020-10-14 05:20:55,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:20:55,671 INFO L93 Difference]: Finished difference Result 65 states and 76 transitions. [2020-10-14 05:20:55,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 05:20:55,671 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 56 [2020-10-14 05:20:55,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:20:55,672 INFO L225 Difference]: With dead ends: 65 [2020-10-14 05:20:55,672 INFO L226 Difference]: Without dead ends: 60 [2020-10-14 05:20:55,673 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-10-14 05:20:55,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-14 05:20:55,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2020-10-14 05:20:55,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-14 05:20:55,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 69 transitions. [2020-10-14 05:20:55,677 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 69 transitions. Word has length 56 [2020-10-14 05:20:55,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:20:55,678 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 69 transitions. [2020-10-14 05:20:55,678 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 05:20:55,678 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 69 transitions. [2020-10-14 05:20:55,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-14 05:20:55,679 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:20:55,679 INFO L422 BasicCegarLoop]: trace histogram [24, 14, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:20:55,679 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-14 05:20:55,679 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:20:55,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:20:55,680 INFO L82 PathProgramCache]: Analyzing trace with hash -2018666413, now seen corresponding path program 23 times [2020-10-14 05:20:55,680 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:20:55,680 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [29843075] [2020-10-14 05:20:55,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:20:55,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:55,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:55,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:56,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:56,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-14 05:20:56,720 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:20:56,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1030 [2020-10-14 05:20:56,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:56,721 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:56,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 05:20:56,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:20:56,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-14 05:20:56,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:20:56,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:20:56,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:56,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:56,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:56,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:20:56,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:56,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:20:56,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:56,885 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:56,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:20:56,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:20:56,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:20:56,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:20:56,892 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 285 proven. 210 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-10-14 05:20:56,892 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [29843075] [2020-10-14 05:20:56,892 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:20:56,892 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 05:20:56,892 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648613763] [2020-10-14 05:20:56,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 05:20:56,893 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:20:56,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 05:20:56,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-10-14 05:20:56,896 INFO L87 Difference]: Start difference. First operand 59 states and 69 transitions. Second operand 17 states. [2020-10-14 05:20:56,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:20:56,957 INFO L93 Difference]: Finished difference Result 87 states and 108 transitions. [2020-10-14 05:20:56,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-14 05:20:56,958 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 58 [2020-10-14 05:20:56,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:20:56,958 INFO L225 Difference]: With dead ends: 87 [2020-10-14 05:20:56,959 INFO L226 Difference]: Without dead ends: 61 [2020-10-14 05:20:56,959 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-10-14 05:20:56,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-14 05:20:56,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-10-14 05:20:56,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-14 05:20:56,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2020-10-14 05:20:56,963 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 58 [2020-10-14 05:20:56,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:20:56,963 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2020-10-14 05:20:56,964 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 05:20:56,964 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2020-10-14 05:20:56,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-14 05:20:56,964 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:20:56,965 INFO L422 BasicCegarLoop]: trace histogram [25, 15, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:20:56,965 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-14 05:20:56,965 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:20:56,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:20:56,966 INFO L82 PathProgramCache]: Analyzing trace with hash -1867174064, now seen corresponding path program 24 times [2020-10-14 05:20:56,966 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:20:56,966 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1604581059] [2020-10-14 05:20:56,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:20:56,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:56,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:56,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:57,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:57,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-14 05:20:57,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:20:57,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 906 [2020-10-14 05:20:57,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:57,881 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:57,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 05:20:57,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-10-14 05:20:57,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-14 05:20:57,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:20:57,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:20:57,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:57,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:57,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:57,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:20:57,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:57,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:20:57,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:57,973 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:57,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:20:57,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:20:57,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:20:57,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:20:57,980 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 315 proven. 100 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-10-14 05:20:57,981 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1604581059] [2020-10-14 05:20:57,981 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:20:57,981 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 05:20:57,982 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468885945] [2020-10-14 05:20:57,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 05:20:57,983 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:20:57,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 05:20:57,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-10-14 05:20:57,983 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand 13 states. [2020-10-14 05:20:58,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:20:58,049 INFO L93 Difference]: Finished difference Result 69 states and 81 transitions. [2020-10-14 05:20:58,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 05:20:58,049 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 60 [2020-10-14 05:20:58,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:20:58,050 INFO L225 Difference]: With dead ends: 69 [2020-10-14 05:20:58,050 INFO L226 Difference]: Without dead ends: 64 [2020-10-14 05:20:58,050 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-10-14 05:20:58,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-14 05:20:58,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2020-10-14 05:20:58,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-14 05:20:58,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 74 transitions. [2020-10-14 05:20:58,053 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 74 transitions. Word has length 60 [2020-10-14 05:20:58,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:20:58,054 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 74 transitions. [2020-10-14 05:20:58,054 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 05:20:58,054 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 74 transitions. [2020-10-14 05:20:58,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-14 05:20:58,055 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:20:58,055 INFO L422 BasicCegarLoop]: trace histogram [26, 15, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:20:58,056 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-14 05:20:58,056 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:20:58,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:20:58,056 INFO L82 PathProgramCache]: Analyzing trace with hash 2045092171, now seen corresponding path program 25 times [2020-10-14 05:20:58,057 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:20:58,057 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [528650718] [2020-10-14 05:20:58,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:20:58,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:58,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:58,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:59,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:59,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-14 05:20:59,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:20:59,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1173 [2020-10-14 05:20:59,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:59,241 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:59,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 05:20:59,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:20:59,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-14 05:20:59,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:20:59,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:20:59,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:59,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:59,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:20:59,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:20:59,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:20:59,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:20:59,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:20:59,424 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:20:59,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:20:59,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:20:59,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:20:59,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:20:59,433 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 336 proven. 240 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-14 05:20:59,433 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [528650718] [2020-10-14 05:20:59,433 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:20:59,434 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 05:20:59,434 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668707000] [2020-10-14 05:20:59,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 05:20:59,434 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:20:59,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 05:20:59,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-10-14 05:20:59,435 INFO L87 Difference]: Start difference. First operand 63 states and 74 transitions. Second operand 18 states. [2020-10-14 05:20:59,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:20:59,512 INFO L93 Difference]: Finished difference Result 93 states and 116 transitions. [2020-10-14 05:20:59,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 05:20:59,513 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 62 [2020-10-14 05:20:59,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:20:59,514 INFO L225 Difference]: With dead ends: 93 [2020-10-14 05:20:59,514 INFO L226 Difference]: Without dead ends: 65 [2020-10-14 05:20:59,514 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-10-14 05:20:59,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-14 05:20:59,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2020-10-14 05:20:59,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-14 05:20:59,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 76 transitions. [2020-10-14 05:20:59,519 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 76 transitions. Word has length 62 [2020-10-14 05:20:59,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:20:59,519 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 76 transitions. [2020-10-14 05:20:59,519 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 05:20:59,520 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 76 transitions. [2020-10-14 05:20:59,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-14 05:20:59,520 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:20:59,521 INFO L422 BasicCegarLoop]: trace histogram [27, 16, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:20:59,521 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-14 05:20:59,521 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:20:59,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:20:59,522 INFO L82 PathProgramCache]: Analyzing trace with hash -148934200, now seen corresponding path program 26 times [2020-10-14 05:20:59,522 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:20:59,522 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1592250256] [2020-10-14 05:20:59,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:20:59,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:20:59,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:20:59,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:00,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:21:00,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-14 05:21:00,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:21:00,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 906 [2020-10-14 05:21:00,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:21:00,440 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:21:00,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 05:21:00,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:21:00,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-14 05:21:00,441 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:21:00,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:21:00,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:21:00,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:00,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:21:00,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:21:00,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:21:00,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:21:00,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:21:00,627 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:21:00,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:21:00,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:21:00,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:21:00,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:21:00,633 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 357 proven. 272 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-14 05:21:00,633 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1592250256] [2020-10-14 05:21:00,633 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:21:00,633 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-14 05:21:00,634 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340424289] [2020-10-14 05:21:00,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-14 05:21:00,634 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:21:00,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-14 05:21:00,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-10-14 05:21:00,635 INFO L87 Difference]: Start difference. First operand 65 states and 76 transitions. Second operand 19 states. [2020-10-14 05:21:00,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:21:00,714 INFO L93 Difference]: Finished difference Result 95 states and 118 transitions. [2020-10-14 05:21:00,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 05:21:00,715 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 64 [2020-10-14 05:21:00,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:21:00,716 INFO L225 Difference]: With dead ends: 95 [2020-10-14 05:21:00,716 INFO L226 Difference]: Without dead ends: 67 [2020-10-14 05:21:00,717 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-10-14 05:21:00,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-14 05:21:00,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-10-14 05:21:00,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-14 05:21:00,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2020-10-14 05:21:00,721 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 64 [2020-10-14 05:21:00,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:21:00,721 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2020-10-14 05:21:00,722 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-14 05:21:00,722 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2020-10-14 05:21:00,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-14 05:21:00,723 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:21:00,723 INFO L422 BasicCegarLoop]: trace histogram [28, 17, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:21:00,723 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-14 05:21:00,723 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:21:00,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:21:00,724 INFO L82 PathProgramCache]: Analyzing trace with hash 220665605, now seen corresponding path program 27 times [2020-10-14 05:21:00,724 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:21:00,724 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1746973734] [2020-10-14 05:21:00,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:21:00,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:21:00,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:00,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:01,579 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:21:01,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-14 05:21:01,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:21:01,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 846 [2020-10-14 05:21:01,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:21:01,579 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:21:01,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 05:21:01,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-14 05:21:01,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-14 05:21:01,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:21:01,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:21:01,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:21:01,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:01,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:21:01,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:21:01,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:21:01,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:21:01,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:21:01,678 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:21:01,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:21:01,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:21:01,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:21:01,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:21:01,681 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 391 proven. 121 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2020-10-14 05:21:01,681 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1746973734] [2020-10-14 05:21:01,681 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:21:01,681 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 05:21:01,682 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898043712] [2020-10-14 05:21:01,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 05:21:01,682 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:21:01,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 05:21:01,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-10-14 05:21:01,683 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand 14 states. [2020-10-14 05:21:01,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:21:01,752 INFO L93 Difference]: Finished difference Result 75 states and 88 transitions. [2020-10-14 05:21:01,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 05:21:01,753 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 66 [2020-10-14 05:21:01,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:21:01,754 INFO L225 Difference]: With dead ends: 75 [2020-10-14 05:21:01,754 INFO L226 Difference]: Without dead ends: 70 [2020-10-14 05:21:01,754 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-10-14 05:21:01,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-14 05:21:01,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2020-10-14 05:21:01,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-14 05:21:01,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 81 transitions. [2020-10-14 05:21:01,766 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 81 transitions. Word has length 66 [2020-10-14 05:21:01,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:21:01,766 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 81 transitions. [2020-10-14 05:21:01,766 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 05:21:01,766 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 81 transitions. [2020-10-14 05:21:01,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-14 05:21:01,767 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:21:01,767 INFO L422 BasicCegarLoop]: trace histogram [29, 17, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:21:01,767 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-14 05:21:01,767 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:21:01,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:21:01,768 INFO L82 PathProgramCache]: Analyzing trace with hash -1585680448, now seen corresponding path program 28 times [2020-10-14 05:21:01,768 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:21:01,768 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1929127311] [2020-10-14 05:21:01,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:21:01,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:21:01,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:01,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:02,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:21:02,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-14 05:21:02,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:21:02,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 846 [2020-10-14 05:21:02,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:21:02,630 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:21:02,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-14 05:21:02,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:21:02,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-14 05:21:02,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:21:02,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:21:02,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:21:02,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:02,857 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:21:02,857 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:21:02,857 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:21:02,857 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:21:02,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:21:02,858 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:21:02,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:21:02,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:21:02,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:21:02,858 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:21:02,863 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 414 proven. 306 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-10-14 05:21:02,864 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1929127311] [2020-10-14 05:21:02,867 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:21:02,867 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-14 05:21:02,867 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186914090] [2020-10-14 05:21:02,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-14 05:21:02,868 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:21:02,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-14 05:21:02,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-10-14 05:21:02,868 INFO L87 Difference]: Start difference. First operand 69 states and 81 transitions. Second operand 20 states. [2020-10-14 05:21:02,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:21:02,972 INFO L93 Difference]: Finished difference Result 101 states and 126 transitions. [2020-10-14 05:21:02,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-14 05:21:02,973 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 68 [2020-10-14 05:21:02,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:21:02,974 INFO L225 Difference]: With dead ends: 101 [2020-10-14 05:21:02,974 INFO L226 Difference]: Without dead ends: 71 [2020-10-14 05:21:02,974 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-10-14 05:21:02,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-14 05:21:02,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2020-10-14 05:21:02,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-14 05:21:02,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 83 transitions. [2020-10-14 05:21:02,982 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 83 transitions. Word has length 68 [2020-10-14 05:21:02,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:21:02,982 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 83 transitions. [2020-10-14 05:21:02,982 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-14 05:21:02,982 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 83 transitions. [2020-10-14 05:21:02,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-14 05:21:02,983 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:21:02,987 INFO L422 BasicCegarLoop]: trace histogram [30, 18, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:21:02,988 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-14 05:21:02,988 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:21:02,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:21:02,988 INFO L82 PathProgramCache]: Analyzing trace with hash 1954885245, now seen corresponding path program 29 times [2020-10-14 05:21:02,989 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:21:02,989 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [433197956] [2020-10-14 05:21:02,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:21:02,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:21:03,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:03,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:04,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:21:04,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-14 05:21:04,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:21:04,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1530 [2020-10-14 05:21:04,528 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:21:04,529 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:21:04,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 05:21:04,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-10-14 05:21:04,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-14 05:21:04,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:21:04,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:21:04,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:21:04,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:04,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:21:04,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:21:04,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:21:04,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:21:04,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:21:04,659 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:21:04,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:21:04,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:21:04,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:21:04,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:21:04,663 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 450 proven. 144 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2020-10-14 05:21:04,663 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [433197956] [2020-10-14 05:21:04,664 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:21:04,664 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 05:21:04,664 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791499961] [2020-10-14 05:21:04,664 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 05:21:04,665 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:21:04,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 05:21:04,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-10-14 05:21:04,665 INFO L87 Difference]: Start difference. First operand 71 states and 83 transitions. Second operand 15 states. [2020-10-14 05:21:04,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:21:04,757 INFO L93 Difference]: Finished difference Result 79 states and 93 transitions. [2020-10-14 05:21:04,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 05:21:04,758 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 70 [2020-10-14 05:21:04,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:21:04,758 INFO L225 Difference]: With dead ends: 79 [2020-10-14 05:21:04,759 INFO L226 Difference]: Without dead ends: 74 [2020-10-14 05:21:04,759 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-10-14 05:21:04,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-14 05:21:04,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2020-10-14 05:21:04,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-14 05:21:04,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 86 transitions. [2020-10-14 05:21:04,763 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 86 transitions. Word has length 70 [2020-10-14 05:21:04,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:21:04,764 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 86 transitions. [2020-10-14 05:21:04,764 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 05:21:04,764 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 86 transitions. [2020-10-14 05:21:04,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-14 05:21:04,764 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:21:04,765 INFO L422 BasicCegarLoop]: trace histogram [31, 18, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:21:04,765 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-14 05:21:04,765 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:21:04,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:21:04,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1447917256, now seen corresponding path program 30 times [2020-10-14 05:21:04,765 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:21:04,766 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [524837463] [2020-10-14 05:21:04,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:21:04,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:21:04,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:04,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:05,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:21:05,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-14 05:21:05,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:21:05,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 966 [2020-10-14 05:21:05,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:21:05,741 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:21:05,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 05:21:05,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:21:05,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-14 05:21:05,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:21:05,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:21:05,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:21:05,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:05,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:21:05,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:21:05,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:21:05,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:21:05,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:21:05,958 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:21:05,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:21:05,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:21:05,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:21:05,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:21:05,963 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 475 proven. 342 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-10-14 05:21:05,963 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [524837463] [2020-10-14 05:21:05,963 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:21:05,964 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-14 05:21:05,964 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470987907] [2020-10-14 05:21:05,964 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-14 05:21:05,964 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:21:05,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-14 05:21:05,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-10-14 05:21:05,965 INFO L87 Difference]: Start difference. First operand 73 states and 86 transitions. Second operand 21 states. [2020-10-14 05:21:06,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:21:06,051 INFO L93 Difference]: Finished difference Result 107 states and 134 transitions. [2020-10-14 05:21:06,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-14 05:21:06,051 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 72 [2020-10-14 05:21:06,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:21:06,052 INFO L225 Difference]: With dead ends: 107 [2020-10-14 05:21:06,052 INFO L226 Difference]: Without dead ends: 75 [2020-10-14 05:21:06,053 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-10-14 05:21:06,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-14 05:21:06,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-10-14 05:21:06,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-14 05:21:06,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 88 transitions. [2020-10-14 05:21:06,058 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 88 transitions. Word has length 72 [2020-10-14 05:21:06,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:21:06,058 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 88 transitions. [2020-10-14 05:21:06,058 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-14 05:21:06,058 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 88 transitions. [2020-10-14 05:21:06,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-14 05:21:06,059 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:21:06,059 INFO L422 BasicCegarLoop]: trace histogram [32, 19, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:21:06,059 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-14 05:21:06,060 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:21:06,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:21:06,060 INFO L82 PathProgramCache]: Analyzing trace with hash 949199221, now seen corresponding path program 31 times [2020-10-14 05:21:06,060 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:21:06,060 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [371309326] [2020-10-14 05:21:06,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:21:06,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:21:06,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:06,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:07,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:21:07,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-14 05:21:07,782 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:21:07,782 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1713 [2020-10-14 05:21:07,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:21:07,782 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:21:07,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-14 05:21:07,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:21:07,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-14 05:21:07,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:21:08,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:21:08,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:21:08,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:08,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:21:08,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:21:08,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:21:08,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:21:08,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:21:08,021 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:21:08,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:21:08,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:21:08,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:21:08,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:21:08,027 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 500 proven. 380 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-10-14 05:21:08,027 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [371309326] [2020-10-14 05:21:08,027 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:21:08,027 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-14 05:21:08,028 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330843443] [2020-10-14 05:21:08,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-14 05:21:08,028 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:21:08,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-14 05:21:08,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-10-14 05:21:08,029 INFO L87 Difference]: Start difference. First operand 75 states and 88 transitions. Second operand 22 states. [2020-10-14 05:21:08,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:21:08,106 INFO L93 Difference]: Finished difference Result 109 states and 136 transitions. [2020-10-14 05:21:08,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 05:21:08,107 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 74 [2020-10-14 05:21:08,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:21:08,108 INFO L225 Difference]: With dead ends: 109 [2020-10-14 05:21:08,108 INFO L226 Difference]: Without dead ends: 77 [2020-10-14 05:21:08,109 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-10-14 05:21:08,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-14 05:21:08,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2020-10-14 05:21:08,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-14 05:21:08,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 90 transitions. [2020-10-14 05:21:08,114 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 90 transitions. Word has length 74 [2020-10-14 05:21:08,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:21:08,114 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 90 transitions. [2020-10-14 05:21:08,114 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-14 05:21:08,114 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 90 transitions. [2020-10-14 05:21:08,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-14 05:21:08,115 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:21:08,115 INFO L422 BasicCegarLoop]: trace histogram [33, 20, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:21:08,116 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-14 05:21:08,116 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:21:08,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:21:08,116 INFO L82 PathProgramCache]: Analyzing trace with hash -1819304334, now seen corresponding path program 32 times [2020-10-14 05:21:08,116 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:21:08,116 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1744862249] [2020-10-14 05:21:08,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:21:08,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:21:08,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:08,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:09,208 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:21:09,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-14 05:21:09,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:21:09,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1086 [2020-10-14 05:21:09,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:21:09,209 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:21:09,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 05:21:09,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 50 [2020-10-14 05:21:09,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-14 05:21:09,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:21:09,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:21:09,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:21:09,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:09,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:21:09,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:21:09,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:21:09,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:21:09,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:21:09,345 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:21:09,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:21:09,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:21:09,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:21:09,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:21:09,349 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 540 proven. 169 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2020-10-14 05:21:09,349 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1744862249] [2020-10-14 05:21:09,349 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:21:09,350 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 05:21:09,350 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161413462] [2020-10-14 05:21:09,350 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 05:21:09,350 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:21:09,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 05:21:09,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-10-14 05:21:09,351 INFO L87 Difference]: Start difference. First operand 77 states and 90 transitions. Second operand 16 states. [2020-10-14 05:21:09,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:21:09,445 INFO L93 Difference]: Finished difference Result 85 states and 100 transitions. [2020-10-14 05:21:09,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 05:21:09,452 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 76 [2020-10-14 05:21:09,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:21:09,453 INFO L225 Difference]: With dead ends: 85 [2020-10-14 05:21:09,453 INFO L226 Difference]: Without dead ends: 80 [2020-10-14 05:21:09,454 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-10-14 05:21:09,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-14 05:21:09,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2020-10-14 05:21:09,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-14 05:21:09,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 93 transitions. [2020-10-14 05:21:09,459 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 93 transitions. Word has length 76 [2020-10-14 05:21:09,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:21:09,459 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 93 transitions. [2020-10-14 05:21:09,459 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 05:21:09,459 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 93 transitions. [2020-10-14 05:21:09,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-14 05:21:09,460 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:21:09,460 INFO L422 BasicCegarLoop]: trace histogram [34, 20, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:21:09,460 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-14 05:21:09,461 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:21:09,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:21:09,461 INFO L82 PathProgramCache]: Analyzing trace with hash 803262445, now seen corresponding path program 33 times [2020-10-14 05:21:09,461 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:21:09,461 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1888115178] [2020-10-14 05:21:09,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:21:09,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:21:09,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:09,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:10,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:21:10,635 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-14 05:21:10,635 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:21:10,635 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1166 [2020-10-14 05:21:10,635 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:21:10,636 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:21:10,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-14 05:21:10,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:21:10,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-14 05:21:10,636 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:21:10,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:21:10,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:21:10,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:10,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:21:10,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:21:10,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:21:10,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:21:10,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:21:10,889 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:21:10,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:21:10,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:21:10,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:21:10,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:21:10,893 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 567 proven. 420 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2020-10-14 05:21:10,893 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1888115178] [2020-10-14 05:21:10,893 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:21:10,894 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-14 05:21:10,894 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901904318] [2020-10-14 05:21:10,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-14 05:21:10,894 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:21:10,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-14 05:21:10,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-10-14 05:21:10,895 INFO L87 Difference]: Start difference. First operand 79 states and 93 transitions. Second operand 23 states. [2020-10-14 05:21:10,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:21:10,988 INFO L93 Difference]: Finished difference Result 115 states and 144 transitions. [2020-10-14 05:21:10,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-14 05:21:10,989 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 78 [2020-10-14 05:21:10,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:21:10,990 INFO L225 Difference]: With dead ends: 115 [2020-10-14 05:21:10,990 INFO L226 Difference]: Without dead ends: 81 [2020-10-14 05:21:10,991 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-10-14 05:21:10,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-14 05:21:10,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-10-14 05:21:10,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-14 05:21:10,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 95 transitions. [2020-10-14 05:21:10,995 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 95 transitions. Word has length 78 [2020-10-14 05:21:10,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:21:10,995 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 95 transitions. [2020-10-14 05:21:10,995 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-14 05:21:10,995 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 95 transitions. [2020-10-14 05:21:10,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-14 05:21:10,996 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:21:10,996 INFO L422 BasicCegarLoop]: trace histogram [35, 21, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:21:10,996 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-14 05:21:10,996 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:21:10,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:21:10,997 INFO L82 PathProgramCache]: Analyzing trace with hash -2106849686, now seen corresponding path program 34 times [2020-10-14 05:21:10,997 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:21:10,997 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1630045291] [2020-10-14 05:21:10,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:21:11,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:21:11,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:11,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:13,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:21:13,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-14 05:21:13,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:21:13,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2469 [2020-10-14 05:21:13,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:21:13,475 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:21:13,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 05:21:13,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 52 [2020-10-14 05:21:13,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-14 05:21:13,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:21:13,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:21:13,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:21:13,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:13,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:21:13,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:21:13,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:21:13,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:21:13,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:21:13,632 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:21:13,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:21:13,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:21:13,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:21:13,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:21:13,637 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 609 proven. 196 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2020-10-14 05:21:13,637 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1630045291] [2020-10-14 05:21:13,637 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:21:13,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 05:21:13,638 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864737393] [2020-10-14 05:21:13,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 05:21:13,638 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:21:13,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 05:21:13,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-10-14 05:21:13,639 INFO L87 Difference]: Start difference. First operand 81 states and 95 transitions. Second operand 17 states. [2020-10-14 05:21:13,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:21:13,721 INFO L93 Difference]: Finished difference Result 89 states and 105 transitions. [2020-10-14 05:21:13,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-14 05:21:13,722 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 80 [2020-10-14 05:21:13,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:21:13,723 INFO L225 Difference]: With dead ends: 89 [2020-10-14 05:21:13,723 INFO L226 Difference]: Without dead ends: 84 [2020-10-14 05:21:13,723 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-10-14 05:21:13,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-14 05:21:13,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2020-10-14 05:21:13,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-14 05:21:13,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 98 transitions. [2020-10-14 05:21:13,728 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 98 transitions. Word has length 80 [2020-10-14 05:21:13,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:21:13,728 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 98 transitions. [2020-10-14 05:21:13,728 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 05:21:13,729 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 98 transitions. [2020-10-14 05:21:13,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-14 05:21:13,729 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:21:13,730 INFO L422 BasicCegarLoop]: trace histogram [36, 21, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:21:13,730 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-14 05:21:13,730 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:21:13,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:21:13,730 INFO L82 PathProgramCache]: Analyzing trace with hash -649913883, now seen corresponding path program 35 times [2020-10-14 05:21:13,731 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:21:13,731 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [343600454] [2020-10-14 05:21:13,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:21:13,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:21:13,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:13,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:16,343 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:21:16,343 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-14 05:21:16,343 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:21:16,343 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2596 [2020-10-14 05:21:16,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:21:16,344 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:21:16,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-14 05:21:16,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:21:16,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-14 05:21:16,344 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:21:16,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:21:16,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:21:16,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:16,648 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:21:16,648 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:21:16,648 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:21:16,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:21:16,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:21:16,649 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:21:16,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:21:16,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:21:16,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:21:16,649 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:21:16,655 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 638 proven. 462 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2020-10-14 05:21:16,656 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [343600454] [2020-10-14 05:21:16,656 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:21:16,656 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-14 05:21:16,656 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736794075] [2020-10-14 05:21:16,657 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-14 05:21:16,657 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:21:16,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-14 05:21:16,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-10-14 05:21:16,658 INFO L87 Difference]: Start difference. First operand 83 states and 98 transitions. Second operand 24 states. [2020-10-14 05:21:16,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:21:16,736 INFO L93 Difference]: Finished difference Result 121 states and 152 transitions. [2020-10-14 05:21:16,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-14 05:21:16,738 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 82 [2020-10-14 05:21:16,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:21:16,739 INFO L225 Difference]: With dead ends: 121 [2020-10-14 05:21:16,739 INFO L226 Difference]: Without dead ends: 85 [2020-10-14 05:21:16,740 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-10-14 05:21:16,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-14 05:21:16,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2020-10-14 05:21:16,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-14 05:21:16,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 100 transitions. [2020-10-14 05:21:16,748 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 100 transitions. Word has length 82 [2020-10-14 05:21:16,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:21:16,750 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 100 transitions. [2020-10-14 05:21:16,750 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-14 05:21:16,750 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 100 transitions. [2020-10-14 05:21:16,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-14 05:21:16,751 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:21:16,751 INFO L422 BasicCegarLoop]: trace histogram [37, 22, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:21:16,752 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-14 05:21:16,752 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:21:16,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:21:16,752 INFO L82 PathProgramCache]: Analyzing trace with hash -299578910, now seen corresponding path program 36 times [2020-10-14 05:21:16,752 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:21:16,752 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [683485508] [2020-10-14 05:21:16,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:21:16,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:21:16,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:16,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:18,295 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:21:18,295 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-14 05:21:18,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:21:18,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1531 [2020-10-14 05:21:18,296 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:21:18,296 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:21:18,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 05:21:18,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 54 [2020-10-14 05:21:18,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-14 05:21:18,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:21:18,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:21:18,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:21:18,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:18,467 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:21:18,467 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:21:18,467 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:21:18,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:21:18,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:21:18,468 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:21:18,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:21:18,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:21:18,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:21:18,468 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:21:18,473 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 682 proven. 225 refuted. 0 times theorem prover too weak. 462 trivial. 0 not checked. [2020-10-14 05:21:18,473 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [683485508] [2020-10-14 05:21:18,474 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:21:18,474 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 05:21:18,474 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525527671] [2020-10-14 05:21:18,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 05:21:18,474 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:21:18,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 05:21:18,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-10-14 05:21:18,475 INFO L87 Difference]: Start difference. First operand 85 states and 100 transitions. Second operand 18 states. [2020-10-14 05:21:18,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:21:18,570 INFO L93 Difference]: Finished difference Result 93 states and 110 transitions. [2020-10-14 05:21:18,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 05:21:18,571 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 84 [2020-10-14 05:21:18,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:21:18,572 INFO L225 Difference]: With dead ends: 93 [2020-10-14 05:21:18,572 INFO L226 Difference]: Without dead ends: 88 [2020-10-14 05:21:18,572 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-10-14 05:21:18,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-14 05:21:18,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2020-10-14 05:21:18,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-14 05:21:18,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 103 transitions. [2020-10-14 05:21:18,579 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 103 transitions. Word has length 84 [2020-10-14 05:21:18,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:21:18,580 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 103 transitions. [2020-10-14 05:21:18,580 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 05:21:18,580 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 103 transitions. [2020-10-14 05:21:18,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-14 05:21:18,582 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:21:18,583 INFO L422 BasicCegarLoop]: trace histogram [38, 22, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:21:18,583 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-14 05:21:18,583 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:21:18,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:21:18,583 INFO L82 PathProgramCache]: Analyzing trace with hash 970514269, now seen corresponding path program 37 times [2020-10-14 05:21:18,584 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:21:18,584 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1210481819] [2020-10-14 05:21:18,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:21:18,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:21:18,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:18,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:20,254 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:21:20,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-14 05:21:20,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:21:20,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1662 [2020-10-14 05:21:20,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:21:20,255 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:21:20,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-14 05:21:20,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:21:20,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-14 05:21:20,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:21:20,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:21:20,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:21:20,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:20,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:21:20,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:21:20,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:21:20,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:21:20,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:21:20,576 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:21:20,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:21:20,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:21:20,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:21:20,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:21:20,581 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 713 proven. 506 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2020-10-14 05:21:20,581 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1210481819] [2020-10-14 05:21:20,581 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:21:20,581 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-14 05:21:20,582 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032378625] [2020-10-14 05:21:20,582 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-14 05:21:20,582 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:21:20,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-14 05:21:20,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-10-14 05:21:20,583 INFO L87 Difference]: Start difference. First operand 87 states and 103 transitions. Second operand 25 states. [2020-10-14 05:21:20,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:21:20,658 INFO L93 Difference]: Finished difference Result 127 states and 160 transitions. [2020-10-14 05:21:20,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-14 05:21:20,658 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 86 [2020-10-14 05:21:20,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:21:20,659 INFO L225 Difference]: With dead ends: 127 [2020-10-14 05:21:20,659 INFO L226 Difference]: Without dead ends: 89 [2020-10-14 05:21:20,659 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-10-14 05:21:20,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-14 05:21:20,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2020-10-14 05:21:20,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-14 05:21:20,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 105 transitions. [2020-10-14 05:21:20,664 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 105 transitions. Word has length 86 [2020-10-14 05:21:20,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:21:20,664 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 105 transitions. [2020-10-14 05:21:20,664 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-14 05:21:20,664 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 105 transitions. [2020-10-14 05:21:20,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-14 05:21:20,665 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:21:20,665 INFO L422 BasicCegarLoop]: trace histogram [39, 23, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:21:20,665 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-14 05:21:20,666 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:21:20,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:21:20,666 INFO L82 PathProgramCache]: Analyzing trace with hash -1506260774, now seen corresponding path program 38 times [2020-10-14 05:21:20,666 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:21:20,666 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1920065069] [2020-10-14 05:21:20,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:21:20,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:21:20,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:20,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:22,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:21:22,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-14 05:21:22,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:21:22,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1768 [2020-10-14 05:21:22,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:21:22,442 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:21:22,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-14 05:21:22,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:21:22,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-14 05:21:22,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:21:22,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:21:22,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:21:22,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:22,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:21:22,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:21:22,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:21:22,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:21:22,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:21:22,764 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:21:22,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:21:22,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:21:22,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:21:22,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:21:22,770 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 744 proven. 552 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2020-10-14 05:21:22,770 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1920065069] [2020-10-14 05:21:22,770 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:21:22,771 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-14 05:21:22,771 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44560515] [2020-10-14 05:21:22,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-14 05:21:22,771 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:21:22,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-14 05:21:22,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-10-14 05:21:22,772 INFO L87 Difference]: Start difference. First operand 89 states and 105 transitions. Second operand 26 states. [2020-10-14 05:21:22,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:21:22,843 INFO L93 Difference]: Finished difference Result 129 states and 162 transitions. [2020-10-14 05:21:22,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-14 05:21:22,844 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 88 [2020-10-14 05:21:22,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:21:22,845 INFO L225 Difference]: With dead ends: 129 [2020-10-14 05:21:22,845 INFO L226 Difference]: Without dead ends: 91 [2020-10-14 05:21:22,846 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-10-14 05:21:22,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-14 05:21:22,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2020-10-14 05:21:22,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-14 05:21:22,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 107 transitions. [2020-10-14 05:21:22,851 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 107 transitions. Word has length 88 [2020-10-14 05:21:22,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:21:22,851 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 107 transitions. [2020-10-14 05:21:22,851 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-14 05:21:22,851 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 107 transitions. [2020-10-14 05:21:22,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-14 05:21:22,852 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:21:22,852 INFO L422 BasicCegarLoop]: trace histogram [40, 24, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:21:22,853 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-14 05:21:22,853 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:21:22,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:21:22,853 INFO L82 PathProgramCache]: Analyzing trace with hash 2019772183, now seen corresponding path program 39 times [2020-10-14 05:21:22,853 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:21:22,853 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [549050510] [2020-10-14 05:21:22,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:21:22,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:21:22,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:22,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:24,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:21:24,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-14 05:21:24,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:21:24,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1915 [2020-10-14 05:21:24,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:21:24,777 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:21:24,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 05:21:24,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 58 [2020-10-14 05:21:24,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-14 05:21:24,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:21:24,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:21:24,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:21:24,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:24,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:21:24,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:21:24,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:21:24,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:21:24,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:21:24,971 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:21:24,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:21:24,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:21:24,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:21:24,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:21:24,976 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 792 proven. 256 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2020-10-14 05:21:24,977 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [549050510] [2020-10-14 05:21:24,977 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:21:24,977 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-14 05:21:24,977 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790844835] [2020-10-14 05:21:24,977 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-14 05:21:24,978 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:21:24,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-14 05:21:24,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-10-14 05:21:24,978 INFO L87 Difference]: Start difference. First operand 91 states and 107 transitions. Second operand 19 states. [2020-10-14 05:21:25,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:21:25,080 INFO L93 Difference]: Finished difference Result 99 states and 117 transitions. [2020-10-14 05:21:25,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 05:21:25,080 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 90 [2020-10-14 05:21:25,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:21:25,082 INFO L225 Difference]: With dead ends: 99 [2020-10-14 05:21:25,082 INFO L226 Difference]: Without dead ends: 94 [2020-10-14 05:21:25,083 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-10-14 05:21:25,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-14 05:21:25,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2020-10-14 05:21:25,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-14 05:21:25,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 110 transitions. [2020-10-14 05:21:25,089 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 110 transitions. Word has length 90 [2020-10-14 05:21:25,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:21:25,089 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 110 transitions. [2020-10-14 05:21:25,089 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-14 05:21:25,089 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 110 transitions. [2020-10-14 05:21:25,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-14 05:21:25,090 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:21:25,090 INFO L422 BasicCegarLoop]: trace histogram [41, 24, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:21:25,091 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-14 05:21:25,091 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:21:25,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:21:25,091 INFO L82 PathProgramCache]: Analyzing trace with hash 778888018, now seen corresponding path program 40 times [2020-10-14 05:21:25,091 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:21:25,091 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1886805735] [2020-10-14 05:21:25,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:21:25,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:21:25,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:25,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:27,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:21:27,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-14 05:21:27,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:21:27,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2014 [2020-10-14 05:21:27,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:21:27,116 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:21:27,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-14 05:21:27,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:21:27,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-14 05:21:27,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:21:27,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:21:27,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:21:27,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:27,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:21:27,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:21:27,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:21:27,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:21:27,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:21:27,462 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:21:27,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:21:27,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:21:27,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:21:27,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:21:27,469 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 825 proven. 600 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2020-10-14 05:21:27,469 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1886805735] [2020-10-14 05:21:27,469 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:21:27,469 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-14 05:21:27,470 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820103891] [2020-10-14 05:21:27,470 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-14 05:21:27,470 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:21:27,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-14 05:21:27,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-10-14 05:21:27,471 INFO L87 Difference]: Start difference. First operand 93 states and 110 transitions. Second operand 27 states. [2020-10-14 05:21:27,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:21:27,554 INFO L93 Difference]: Finished difference Result 135 states and 170 transitions. [2020-10-14 05:21:27,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-14 05:21:27,554 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 92 [2020-10-14 05:21:27,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:21:27,555 INFO L225 Difference]: With dead ends: 135 [2020-10-14 05:21:27,555 INFO L226 Difference]: Without dead ends: 95 [2020-10-14 05:21:27,556 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-10-14 05:21:27,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-14 05:21:27,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2020-10-14 05:21:27,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-14 05:21:27,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 112 transitions. [2020-10-14 05:21:27,562 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 112 transitions. Word has length 92 [2020-10-14 05:21:27,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:21:27,562 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 112 transitions. [2020-10-14 05:21:27,562 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-14 05:21:27,563 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 112 transitions. [2020-10-14 05:21:27,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-14 05:21:27,565 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:21:27,565 INFO L422 BasicCegarLoop]: trace histogram [42, 25, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:21:27,565 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-14 05:21:27,565 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:21:27,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:21:27,565 INFO L82 PathProgramCache]: Analyzing trace with hash -633046257, now seen corresponding path program 41 times [2020-10-14 05:21:27,566 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:21:27,566 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1110269509] [2020-10-14 05:21:27,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:21:27,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:21:27,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:27,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:31,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:21:31,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-14 05:21:31,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:21:31,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4179 [2020-10-14 05:21:31,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:21:31,754 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:21:31,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-14 05:21:31,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 60 [2020-10-14 05:21:31,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-14 05:21:31,755 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:21:31,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:21:31,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:21:31,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:31,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:21:31,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:21:31,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:21:31,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:21:31,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:21:31,958 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:21:31,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:21:31,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:21:31,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:21:31,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:21:31,964 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 875 proven. 289 refuted. 0 times theorem prover too weak. 600 trivial. 0 not checked. [2020-10-14 05:21:31,964 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1110269509] [2020-10-14 05:21:31,964 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:21:31,964 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-14 05:21:31,965 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557474615] [2020-10-14 05:21:31,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-14 05:21:31,965 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:21:31,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-14 05:21:31,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-10-14 05:21:31,966 INFO L87 Difference]: Start difference. First operand 95 states and 112 transitions. Second operand 20 states. [2020-10-14 05:21:32,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:21:32,060 INFO L93 Difference]: Finished difference Result 103 states and 122 transitions. [2020-10-14 05:21:32,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-14 05:21:32,060 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 94 [2020-10-14 05:21:32,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:21:32,061 INFO L225 Difference]: With dead ends: 103 [2020-10-14 05:21:32,061 INFO L226 Difference]: Without dead ends: 98 [2020-10-14 05:21:32,062 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-10-14 05:21:32,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-14 05:21:32,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2020-10-14 05:21:32,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-14 05:21:32,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 115 transitions. [2020-10-14 05:21:32,072 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 115 transitions. Word has length 94 [2020-10-14 05:21:32,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:21:32,072 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 115 transitions. [2020-10-14 05:21:32,072 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-14 05:21:32,072 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 115 transitions. [2020-10-14 05:21:32,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-14 05:21:32,075 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:21:32,075 INFO L422 BasicCegarLoop]: trace histogram [43, 25, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:21:32,075 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-14 05:21:32,076 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:21:32,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:21:32,076 INFO L82 PathProgramCache]: Analyzing trace with hash -1664026294, now seen corresponding path program 42 times [2020-10-14 05:21:32,076 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:21:32,077 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [909731844] [2020-10-14 05:21:32,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:21:32,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:21:32,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:32,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:34,430 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:21:34,430 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-14 05:21:34,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:21:34,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2343 [2020-10-14 05:21:34,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:21:34,431 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:21:34,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-14 05:21:34,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:21:34,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-14 05:21:34,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:21:34,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:21:34,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:21:34,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:34,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:21:34,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:21:34,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:21:34,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:21:34,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:21:34,840 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:21:34,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:21:34,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:21:34,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:21:34,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:21:34,847 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 910 proven. 650 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2020-10-14 05:21:34,847 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [909731844] [2020-10-14 05:21:34,847 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:21:34,847 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-14 05:21:34,847 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557247276] [2020-10-14 05:21:34,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-14 05:21:34,848 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:21:34,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-14 05:21:34,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-10-14 05:21:34,849 INFO L87 Difference]: Start difference. First operand 97 states and 115 transitions. Second operand 28 states. [2020-10-14 05:21:34,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:21:34,944 INFO L93 Difference]: Finished difference Result 141 states and 178 transitions. [2020-10-14 05:21:34,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-14 05:21:34,945 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 96 [2020-10-14 05:21:34,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:21:34,946 INFO L225 Difference]: With dead ends: 141 [2020-10-14 05:21:34,946 INFO L226 Difference]: Without dead ends: 99 [2020-10-14 05:21:34,947 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-10-14 05:21:34,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-14 05:21:34,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2020-10-14 05:21:34,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-14 05:21:34,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 117 transitions. [2020-10-14 05:21:34,954 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 117 transitions. Word has length 96 [2020-10-14 05:21:34,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:21:34,954 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 117 transitions. [2020-10-14 05:21:34,954 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-14 05:21:34,954 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 117 transitions. [2020-10-14 05:21:34,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-14 05:21:34,956 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:21:34,956 INFO L422 BasicCegarLoop]: trace histogram [44, 26, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:21:34,956 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-14 05:21:34,956 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:21:34,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:21:34,958 INFO L82 PathProgramCache]: Analyzing trace with hash -546542969, now seen corresponding path program 43 times [2020-10-14 05:21:34,958 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:21:34,958 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1531378872] [2020-10-14 05:21:34,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:21:34,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:21:34,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:35,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:37,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:21:37,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-14 05:21:37,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:21:37,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2571 [2020-10-14 05:21:37,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:21:37,544 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:21:37,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-14 05:21:37,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:21:37,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-14 05:21:37,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:21:38,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:21:38,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:21:38,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:38,018 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:21:38,019 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:21:38,019 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:21:38,019 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:21:38,019 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:21:38,020 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:21:38,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:21:38,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:21:38,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:21:38,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:21:38,038 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 945 proven. 702 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2020-10-14 05:21:38,038 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1531378872] [2020-10-14 05:21:38,039 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:21:38,039 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-14 05:21:38,039 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588697753] [2020-10-14 05:21:38,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-14 05:21:38,041 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:21:38,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-14 05:21:38,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-10-14 05:21:38,042 INFO L87 Difference]: Start difference. First operand 99 states and 117 transitions. Second operand 29 states. [2020-10-14 05:21:38,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:21:38,161 INFO L93 Difference]: Finished difference Result 143 states and 180 transitions. [2020-10-14 05:21:38,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-14 05:21:38,162 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 98 [2020-10-14 05:21:38,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:21:38,163 INFO L225 Difference]: With dead ends: 143 [2020-10-14 05:21:38,163 INFO L226 Difference]: Without dead ends: 101 [2020-10-14 05:21:38,164 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-10-14 05:21:38,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-14 05:21:38,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2020-10-14 05:21:38,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-14 05:21:38,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 119 transitions. [2020-10-14 05:21:38,172 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 119 transitions. Word has length 98 [2020-10-14 05:21:38,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:21:38,173 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 119 transitions. [2020-10-14 05:21:38,173 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-14 05:21:38,173 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 119 transitions. [2020-10-14 05:21:38,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-14 05:21:38,174 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:21:38,174 INFO L422 BasicCegarLoop]: trace histogram [45, 27, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:21:38,174 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-14 05:21:38,175 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:21:38,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:21:38,175 INFO L82 PathProgramCache]: Analyzing trace with hash -386891644, now seen corresponding path program 44 times [2020-10-14 05:21:38,176 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:21:38,176 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2041484156] [2020-10-14 05:21:38,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:21:38,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:21:38,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:38,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:41,262 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:21:41,262 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-14 05:21:41,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:21:41,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3070 [2020-10-14 05:21:41,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:21:41,263 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:21:41,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 05:21:41,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 64 [2020-10-14 05:21:41,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-14 05:21:41,263 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:21:41,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:21:41,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:21:41,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:41,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:21:41,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:21:41,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:21:41,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:21:41,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:21:41,492 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:21:41,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:21:41,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:21:41,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:21:41,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:21:41,501 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 999 proven. 324 refuted. 0 times theorem prover too weak. 702 trivial. 0 not checked. [2020-10-14 05:21:41,501 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2041484156] [2020-10-14 05:21:41,501 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:21:41,502 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-14 05:21:41,502 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847847568] [2020-10-14 05:21:41,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-14 05:21:41,502 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:21:41,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-14 05:21:41,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-10-14 05:21:41,503 INFO L87 Difference]: Start difference. First operand 101 states and 119 transitions. Second operand 21 states. [2020-10-14 05:21:41,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:21:41,605 INFO L93 Difference]: Finished difference Result 109 states and 129 transitions. [2020-10-14 05:21:41,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-14 05:21:41,607 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 100 [2020-10-14 05:21:41,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:21:41,608 INFO L225 Difference]: With dead ends: 109 [2020-10-14 05:21:41,608 INFO L226 Difference]: Without dead ends: 104 [2020-10-14 05:21:41,609 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-10-14 05:21:41,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-14 05:21:41,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2020-10-14 05:21:41,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-14 05:21:41,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 122 transitions. [2020-10-14 05:21:41,615 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 122 transitions. Word has length 100 [2020-10-14 05:21:41,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:21:41,615 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 122 transitions. [2020-10-14 05:21:41,615 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-14 05:21:41,615 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 122 transitions. [2020-10-14 05:21:41,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-14 05:21:41,616 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:21:41,616 INFO L422 BasicCegarLoop]: trace histogram [46, 27, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:21:41,616 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-14 05:21:41,616 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:21:41,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:21:41,617 INFO L82 PathProgramCache]: Analyzing trace with hash -1332644481, now seen corresponding path program 45 times [2020-10-14 05:21:41,617 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:21:41,617 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1539569743] [2020-10-14 05:21:41,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:21:41,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:21:41,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:41,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:44,580 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:21:44,580 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-14 05:21:44,580 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:21:44,580 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2947 [2020-10-14 05:21:44,580 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:21:44,581 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:21:44,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-14 05:21:44,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:21:44,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-14 05:21:44,581 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:21:45,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:21:45,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:21:45,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:45,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:21:45,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:21:45,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:21:45,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:21:45,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:21:45,045 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:21:45,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:21:45,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:21:45,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:21:45,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:21:45,058 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 1036 proven. 756 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2020-10-14 05:21:45,059 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1539569743] [2020-10-14 05:21:45,059 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:21:45,059 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-14 05:21:45,060 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381776671] [2020-10-14 05:21:45,060 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-14 05:21:45,060 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:21:45,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-14 05:21:45,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-10-14 05:21:45,061 INFO L87 Difference]: Start difference. First operand 103 states and 122 transitions. Second operand 30 states. [2020-10-14 05:21:45,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:21:45,176 INFO L93 Difference]: Finished difference Result 149 states and 188 transitions. [2020-10-14 05:21:45,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-14 05:21:45,177 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 102 [2020-10-14 05:21:45,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:21:45,178 INFO L225 Difference]: With dead ends: 149 [2020-10-14 05:21:45,178 INFO L226 Difference]: Without dead ends: 105 [2020-10-14 05:21:45,179 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-10-14 05:21:45,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-14 05:21:45,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2020-10-14 05:21:45,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-14 05:21:45,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 124 transitions. [2020-10-14 05:21:45,184 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 124 transitions. Word has length 102 [2020-10-14 05:21:45,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:21:45,184 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 124 transitions. [2020-10-14 05:21:45,184 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-14 05:21:45,184 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 124 transitions. [2020-10-14 05:21:45,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-14 05:21:45,185 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:21:45,185 INFO L422 BasicCegarLoop]: trace histogram [47, 28, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:21:45,185 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-14 05:21:45,186 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:21:45,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:21:45,186 INFO L82 PathProgramCache]: Analyzing trace with hash -1913633540, now seen corresponding path program 46 times [2020-10-14 05:21:45,186 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:21:45,186 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1758784540] [2020-10-14 05:21:45,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:21:45,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:21:45,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:45,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:50,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:21:50,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-14 05:21:50,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:21:50,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 05:21:50,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:21:50,197 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:21:50,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-14 05:21:50,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 66 [2020-10-14 05:21:50,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-14 05:21:50,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:21:50,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:21:50,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:21:50,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:50,436 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:21:50,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:21:50,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:21:50,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:21:50,436 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:21:50,437 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:21:50,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:21:50,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:21:50,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:21:50,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:21:50,444 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 1092 proven. 361 refuted. 0 times theorem prover too weak. 756 trivial. 0 not checked. [2020-10-14 05:21:50,444 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1758784540] [2020-10-14 05:21:50,444 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:21:50,444 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-14 05:21:50,444 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678934462] [2020-10-14 05:21:50,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-14 05:21:50,445 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:21:50,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-14 05:21:50,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-10-14 05:21:50,445 INFO L87 Difference]: Start difference. First operand 105 states and 124 transitions. Second operand 22 states. [2020-10-14 05:21:50,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:21:50,563 INFO L93 Difference]: Finished difference Result 113 states and 134 transitions. [2020-10-14 05:21:50,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 05:21:50,563 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 104 [2020-10-14 05:21:50,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:21:50,565 INFO L225 Difference]: With dead ends: 113 [2020-10-14 05:21:50,565 INFO L226 Difference]: Without dead ends: 108 [2020-10-14 05:21:50,565 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-10-14 05:21:50,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-14 05:21:50,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2020-10-14 05:21:50,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-14 05:21:50,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 127 transitions. [2020-10-14 05:21:50,570 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 127 transitions. Word has length 104 [2020-10-14 05:21:50,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:21:50,570 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 127 transitions. [2020-10-14 05:21:50,570 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-14 05:21:50,570 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 127 transitions. [2020-10-14 05:21:50,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-14 05:21:50,571 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:21:50,571 INFO L422 BasicCegarLoop]: trace histogram [48, 28, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:21:50,572 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-14 05:21:50,572 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:21:50,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:21:50,572 INFO L82 PathProgramCache]: Analyzing trace with hash 347208695, now seen corresponding path program 47 times [2020-10-14 05:21:50,572 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:21:50,572 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1590949968] [2020-10-14 05:21:50,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:21:50,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:21:50,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:50,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:54,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:21:54,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-14 05:21:54,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:21:54,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3508 [2020-10-14 05:21:54,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:21:54,094 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:21:54,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-14 05:21:54,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:21:54,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-14 05:21:54,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:21:54,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:21:54,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:21:54,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:54,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:21:54,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:21:54,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:21:54,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:21:54,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:21:54,584 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:21:54,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:21:54,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:21:54,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:21:54,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:21:54,594 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 1131 proven. 812 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2020-10-14 05:21:54,595 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1590949968] [2020-10-14 05:21:54,595 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:21:54,595 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-14 05:21:54,595 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949131932] [2020-10-14 05:21:54,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-14 05:21:54,596 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:21:54,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-14 05:21:54,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-10-14 05:21:54,597 INFO L87 Difference]: Start difference. First operand 107 states and 127 transitions. Second operand 31 states. [2020-10-14 05:21:54,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:21:54,723 INFO L93 Difference]: Finished difference Result 155 states and 196 transitions. [2020-10-14 05:21:54,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-14 05:21:54,724 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 106 [2020-10-14 05:21:54,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:21:54,724 INFO L225 Difference]: With dead ends: 155 [2020-10-14 05:21:54,724 INFO L226 Difference]: Without dead ends: 109 [2020-10-14 05:21:54,725 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-10-14 05:21:54,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-14 05:21:54,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2020-10-14 05:21:54,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-14 05:21:54,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 129 transitions. [2020-10-14 05:21:54,730 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 129 transitions. Word has length 106 [2020-10-14 05:21:54,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:21:54,730 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 129 transitions. [2020-10-14 05:21:54,730 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-14 05:21:54,730 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 129 transitions. [2020-10-14 05:21:54,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-14 05:21:54,731 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:21:54,731 INFO L422 BasicCegarLoop]: trace histogram [49, 29, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:21:54,731 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-14 05:21:54,731 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:21:54,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:21:54,732 INFO L82 PathProgramCache]: Analyzing trace with hash 2129839348, now seen corresponding path program 48 times [2020-10-14 05:21:54,732 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:21:54,732 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [712052794] [2020-10-14 05:21:54,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:21:54,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:21:54,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:54,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:58,141 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:21:58,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-14 05:21:58,142 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:21:58,142 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3398 [2020-10-14 05:21:58,142 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:21:58,142 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:21:58,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-14 05:21:58,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 68 [2020-10-14 05:21:58,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-14 05:21:58,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:21:58,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:21:58,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:21:58,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:58,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:21:58,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:21:58,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:21:58,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:21:58,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:21:58,403 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:21:58,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:21:58,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:21:58,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:21:58,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:21:58,413 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 1189 proven. 400 refuted. 0 times theorem prover too weak. 812 trivial. 0 not checked. [2020-10-14 05:21:58,414 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [712052794] [2020-10-14 05:21:58,414 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:21:58,414 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-14 05:21:58,414 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062312809] [2020-10-14 05:21:58,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-14 05:21:58,415 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:21:58,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-14 05:21:58,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-10-14 05:21:58,416 INFO L87 Difference]: Start difference. First operand 109 states and 129 transitions. Second operand 23 states. [2020-10-14 05:21:58,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:21:58,537 INFO L93 Difference]: Finished difference Result 117 states and 139 transitions. [2020-10-14 05:21:58,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-14 05:21:58,537 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 108 [2020-10-14 05:21:58,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:21:58,539 INFO L225 Difference]: With dead ends: 117 [2020-10-14 05:21:58,539 INFO L226 Difference]: Without dead ends: 112 [2020-10-14 05:21:58,539 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-10-14 05:21:58,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-14 05:21:58,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2020-10-14 05:21:58,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-14 05:21:58,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 132 transitions. [2020-10-14 05:21:58,544 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 132 transitions. Word has length 108 [2020-10-14 05:21:58,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:21:58,544 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 132 transitions. [2020-10-14 05:21:58,544 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-14 05:21:58,544 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 132 transitions. [2020-10-14 05:21:58,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-14 05:21:58,545 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:21:58,545 INFO L422 BasicCegarLoop]: trace histogram [50, 29, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:21:58,545 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-14 05:21:58,545 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:21:58,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:21:58,546 INFO L82 PathProgramCache]: Analyzing trace with hash -820748817, now seen corresponding path program 49 times [2020-10-14 05:21:58,546 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:21:58,546 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1145883158] [2020-10-14 05:21:58,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:21:58,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:21:58,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:21:58,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:22:03,559 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:22:03,559 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-14 05:22:03,559 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:22:03,559 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 05:22:03,560 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:22:03,560 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:22:03,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-14 05:22:03,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:22:03,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-14 05:22:03,560 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:22:04,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:22:04,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:22:04,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:22:04,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:22:04,063 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:22:04,063 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:22:04,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:22:04,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:22:04,064 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:22:04,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:22:04,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:22:04,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:22:04,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:22:04,073 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 1230 proven. 870 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2020-10-14 05:22:04,073 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1145883158] [2020-10-14 05:22:04,073 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:22:04,073 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-14 05:22:04,074 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479097798] [2020-10-14 05:22:04,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-14 05:22:04,074 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:22:04,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-14 05:22:04,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-10-14 05:22:04,075 INFO L87 Difference]: Start difference. First operand 111 states and 132 transitions. Second operand 32 states. [2020-10-14 05:22:04,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:22:04,201 INFO L93 Difference]: Finished difference Result 161 states and 204 transitions. [2020-10-14 05:22:04,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-14 05:22:04,201 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 110 [2020-10-14 05:22:04,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:22:04,203 INFO L225 Difference]: With dead ends: 161 [2020-10-14 05:22:04,203 INFO L226 Difference]: Without dead ends: 113 [2020-10-14 05:22:04,204 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-10-14 05:22:04,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-14 05:22:04,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2020-10-14 05:22:04,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-14 05:22:04,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 134 transitions. [2020-10-14 05:22:04,209 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 134 transitions. Word has length 110 [2020-10-14 05:22:04,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:22:04,209 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 134 transitions. [2020-10-14 05:22:04,209 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-14 05:22:04,209 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 134 transitions. [2020-10-14 05:22:04,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-14 05:22:04,210 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:22:04,210 INFO L422 BasicCegarLoop]: trace histogram [51, 30, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:22:04,211 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-14 05:22:04,211 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:22:04,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:22:04,211 INFO L82 PathProgramCache]: Analyzing trace with hash 698245228, now seen corresponding path program 50 times [2020-10-14 05:22:04,211 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:22:04,211 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [645381501] [2020-10-14 05:22:04,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:22:04,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:22:04,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:22:04,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:22:08,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:22:08,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-14 05:22:08,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:22:08,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3999 [2020-10-14 05:22:08,225 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:22:08,225 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:22:08,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-14 05:22:08,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:22:08,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-14 05:22:08,225 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:22:08,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:22:08,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:22:08,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:22:08,750 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:22:08,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:22:08,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:22:08,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:22:08,750 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:22:08,751 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:22:08,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:22:08,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:22:08,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:22:08,751 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:22:08,762 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 1271 proven. 930 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2020-10-14 05:22:08,762 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [645381501] [2020-10-14 05:22:08,762 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:22:08,762 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-14 05:22:08,762 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608189921] [2020-10-14 05:22:08,763 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-14 05:22:08,763 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:22:08,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-14 05:22:08,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 05:22:08,763 INFO L87 Difference]: Start difference. First operand 113 states and 134 transitions. Second operand 33 states. [2020-10-14 05:22:08,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:22:08,883 INFO L93 Difference]: Finished difference Result 163 states and 206 transitions. [2020-10-14 05:22:08,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-14 05:22:08,884 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 112 [2020-10-14 05:22:08,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:22:08,885 INFO L225 Difference]: With dead ends: 163 [2020-10-14 05:22:08,885 INFO L226 Difference]: Without dead ends: 115 [2020-10-14 05:22:08,885 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 05:22:08,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-14 05:22:08,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2020-10-14 05:22:08,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-14 05:22:08,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 136 transitions. [2020-10-14 05:22:08,890 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 136 transitions. Word has length 112 [2020-10-14 05:22:08,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:22:08,891 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 136 transitions. [2020-10-14 05:22:08,891 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-14 05:22:08,891 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 136 transitions. [2020-10-14 05:22:08,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-14 05:22:08,892 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:22:08,892 INFO L422 BasicCegarLoop]: trace histogram [52, 31, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:22:08,892 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-14 05:22:08,892 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:22:08,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:22:08,892 INFO L82 PathProgramCache]: Analyzing trace with hash 162641833, now seen corresponding path program 51 times [2020-10-14 05:22:08,893 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:22:08,893 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1166263946] [2020-10-14 05:22:08,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:22:08,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:22:08,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:22:09,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:22:13,038 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:22:13,038 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-14 05:22:13,038 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:22:13,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4131 [2020-10-14 05:22:13,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:22:13,038 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:22:13,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-14 05:22:13,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 72 [2020-10-14 05:22:13,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-14 05:22:13,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:22:13,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:22:13,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:22:13,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:22:13,313 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:22:13,314 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:22:13,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:22:13,314 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:22:13,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:22:13,314 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:22:13,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:22:13,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:22:13,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:22:13,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:22:13,322 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 1333 proven. 441 refuted. 0 times theorem prover too weak. 930 trivial. 0 not checked. [2020-10-14 05:22:13,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1166263946] [2020-10-14 05:22:13,323 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:22:13,323 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-14 05:22:13,323 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189921100] [2020-10-14 05:22:13,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-14 05:22:13,324 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:22:13,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-14 05:22:13,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-10-14 05:22:13,324 INFO L87 Difference]: Start difference. First operand 115 states and 136 transitions. Second operand 24 states. [2020-10-14 05:22:13,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:22:13,433 INFO L93 Difference]: Finished difference Result 123 states and 146 transitions. [2020-10-14 05:22:13,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-14 05:22:13,433 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 114 [2020-10-14 05:22:13,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:22:13,434 INFO L225 Difference]: With dead ends: 123 [2020-10-14 05:22:13,434 INFO L226 Difference]: Without dead ends: 118 [2020-10-14 05:22:13,435 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-10-14 05:22:13,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-14 05:22:13,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 117. [2020-10-14 05:22:13,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-14 05:22:13,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 139 transitions. [2020-10-14 05:22:13,440 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 139 transitions. Word has length 114 [2020-10-14 05:22:13,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:22:13,441 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 139 transitions. [2020-10-14 05:22:13,441 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-14 05:22:13,441 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 139 transitions. [2020-10-14 05:22:13,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-14 05:22:13,442 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:22:13,442 INFO L422 BasicCegarLoop]: trace histogram [53, 31, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:22:13,442 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-14 05:22:13,442 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:22:13,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:22:13,442 INFO L82 PathProgramCache]: Analyzing trace with hash -1511950492, now seen corresponding path program 52 times [2020-10-14 05:22:13,443 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:22:13,443 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1334204561] [2020-10-14 05:22:13,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:22:13,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:22:13,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:22:13,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:22:17,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:22:17,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-14 05:22:17,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:22:17,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4480 [2020-10-14 05:22:17,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:22:17,937 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:22:17,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-14 05:22:17,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:22:17,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-14 05:22:17,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:22:18,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:22:18,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:22:18,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:22:18,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:22:18,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:22:18,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:22:18,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:22:18,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:22:18,496 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:22:18,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:22:18,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:22:18,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:22:18,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:22:18,506 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 1376 proven. 992 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2020-10-14 05:22:18,506 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1334204561] [2020-10-14 05:22:18,506 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:22:18,507 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-14 05:22:18,507 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272287065] [2020-10-14 05:22:18,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-14 05:22:18,507 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:22:18,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-14 05:22:18,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-10-14 05:22:18,508 INFO L87 Difference]: Start difference. First operand 117 states and 139 transitions. Second operand 34 states. [2020-10-14 05:22:18,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:22:18,630 INFO L93 Difference]: Finished difference Result 169 states and 214 transitions. [2020-10-14 05:22:18,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-14 05:22:18,631 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 116 [2020-10-14 05:22:18,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:22:18,632 INFO L225 Difference]: With dead ends: 169 [2020-10-14 05:22:18,632 INFO L226 Difference]: Without dead ends: 119 [2020-10-14 05:22:18,633 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-10-14 05:22:18,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-14 05:22:18,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2020-10-14 05:22:18,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-14 05:22:18,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 141 transitions. [2020-10-14 05:22:18,638 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 141 transitions. Word has length 116 [2020-10-14 05:22:18,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:22:18,638 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 141 transitions. [2020-10-14 05:22:18,638 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-14 05:22:18,639 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 141 transitions. [2020-10-14 05:22:18,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-10-14 05:22:18,639 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:22:18,639 INFO L422 BasicCegarLoop]: trace histogram [54, 32, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:22:18,640 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-14 05:22:18,640 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:22:18,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:22:18,640 INFO L82 PathProgramCache]: Analyzing trace with hash 298641441, now seen corresponding path program 53 times [2020-10-14 05:22:18,640 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:22:18,641 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [389368792] [2020-10-14 05:22:18,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:22:18,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:22:18,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:22:18,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:22:23,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:22:23,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-10-14 05:22:23,028 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:22:23,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4373 [2020-10-14 05:22:23,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:22:23,029 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:22:23,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-14 05:22:23,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 74 [2020-10-14 05:22:23,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-14 05:22:23,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:22:23,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:22:23,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:22:23,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:22:23,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:22:23,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:22:23,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:22:23,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:22:23,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:22:23,351 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:22:23,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:22:23,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:22:23,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:22:23,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:22:23,359 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 1440 proven. 484 refuted. 0 times theorem prover too weak. 992 trivial. 0 not checked. [2020-10-14 05:22:23,359 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [389368792] [2020-10-14 05:22:23,360 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:22:23,360 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-14 05:22:23,360 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731093061] [2020-10-14 05:22:23,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-14 05:22:23,360 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:22:23,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-14 05:22:23,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-10-14 05:22:23,361 INFO L87 Difference]: Start difference. First operand 119 states and 141 transitions. Second operand 25 states. [2020-10-14 05:22:23,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:22:23,492 INFO L93 Difference]: Finished difference Result 127 states and 151 transitions. [2020-10-14 05:22:23,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-14 05:22:23,492 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 118 [2020-10-14 05:22:23,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:22:23,494 INFO L225 Difference]: With dead ends: 127 [2020-10-14 05:22:23,494 INFO L226 Difference]: Without dead ends: 122 [2020-10-14 05:22:23,494 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-10-14 05:22:23,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-14 05:22:23,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2020-10-14 05:22:23,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-14 05:22:23,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 144 transitions. [2020-10-14 05:22:23,499 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 144 transitions. Word has length 118 [2020-10-14 05:22:23,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:22:23,500 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 144 transitions. [2020-10-14 05:22:23,500 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-14 05:22:23,500 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 144 transitions. [2020-10-14 05:22:23,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-10-14 05:22:23,500 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:22:23,501 INFO L422 BasicCegarLoop]: trace histogram [55, 32, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:22:23,501 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-14 05:22:23,501 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:22:23,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:22:23,501 INFO L82 PathProgramCache]: Analyzing trace with hash 334653916, now seen corresponding path program 54 times [2020-10-14 05:22:23,502 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:22:23,502 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [186884160] [2020-10-14 05:22:23,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:22:23,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:22:23,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:22:23,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:22:28,519 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:22:28,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-10-14 05:22:28,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:22:28,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-14 05:22:28,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:22:28,520 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:22:28,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-14 05:22:28,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:22:28,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-14 05:22:28,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:22:29,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:22:29,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:22:29,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:22:29,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:22:29,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:22:29,139 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:22:29,139 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:22:29,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:22:29,140 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:22:29,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:22:29,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:22:29,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:22:29,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:22:29,153 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 1485 proven. 1056 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2020-10-14 05:22:29,153 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [186884160] [2020-10-14 05:22:29,154 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:22:29,154 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-14 05:22:29,154 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047818373] [2020-10-14 05:22:29,154 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-14 05:22:29,154 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:22:29,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-14 05:22:29,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-10-14 05:22:29,155 INFO L87 Difference]: Start difference. First operand 121 states and 144 transitions. Second operand 35 states. [2020-10-14 05:22:29,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:22:29,272 INFO L93 Difference]: Finished difference Result 175 states and 222 transitions. [2020-10-14 05:22:29,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-14 05:22:29,275 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 120 [2020-10-14 05:22:29,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:22:29,276 INFO L225 Difference]: With dead ends: 175 [2020-10-14 05:22:29,276 INFO L226 Difference]: Without dead ends: 123 [2020-10-14 05:22:29,277 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-10-14 05:22:29,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-14 05:22:29,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2020-10-14 05:22:29,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-14 05:22:29,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 146 transitions. [2020-10-14 05:22:29,280 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 146 transitions. Word has length 120 [2020-10-14 05:22:29,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:22:29,280 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 146 transitions. [2020-10-14 05:22:29,280 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-14 05:22:29,280 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 146 transitions. [2020-10-14 05:22:29,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-14 05:22:29,281 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:22:29,281 INFO L422 BasicCegarLoop]: trace histogram [56, 33, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:22:29,281 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-14 05:22:29,281 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:22:29,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:22:29,282 INFO L82 PathProgramCache]: Analyzing trace with hash -955436007, now seen corresponding path program 55 times [2020-10-14 05:22:29,282 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:22:29,282 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [998965371] [2020-10-14 05:22:29,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:22:29,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:22:29,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:22:29,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:22:34,296 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:22:34,296 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-14 05:22:34,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:22:34,297 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 05:22:34,297 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:22:34,297 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:22:34,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-14 05:22:34,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:22:34,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-14 05:22:34,297 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:22:34,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:22:34,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:22:34,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:22:34,963 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:22:34,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:22:34,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:22:34,964 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:22:34,964 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:22:34,964 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:22:34,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:22:34,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:22:34,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:22:34,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:22:34,974 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 1530 proven. 1122 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2020-10-14 05:22:34,975 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [998965371] [2020-10-14 05:22:34,975 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:22:34,975 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-14 05:22:34,975 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241462300] [2020-10-14 05:22:34,976 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-14 05:22:34,976 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:22:34,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-14 05:22:34,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-10-14 05:22:34,977 INFO L87 Difference]: Start difference. First operand 123 states and 146 transitions. Second operand 36 states. [2020-10-14 05:22:35,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:22:35,119 INFO L93 Difference]: Finished difference Result 177 states and 224 transitions. [2020-10-14 05:22:35,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-14 05:22:35,119 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 122 [2020-10-14 05:22:35,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:22:35,120 INFO L225 Difference]: With dead ends: 177 [2020-10-14 05:22:35,120 INFO L226 Difference]: Without dead ends: 125 [2020-10-14 05:22:35,121 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-10-14 05:22:35,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-14 05:22:35,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2020-10-14 05:22:35,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-14 05:22:35,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 148 transitions. [2020-10-14 05:22:35,125 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 148 transitions. Word has length 122 [2020-10-14 05:22:35,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:22:35,126 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 148 transitions. [2020-10-14 05:22:35,126 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-14 05:22:35,126 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 148 transitions. [2020-10-14 05:22:35,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-10-14 05:22:35,127 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:22:35,127 INFO L422 BasicCegarLoop]: trace histogram [57, 34, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:22:35,127 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-14 05:22:35,127 INFO L427 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:22:35,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:22:35,128 INFO L82 PathProgramCache]: Analyzing trace with hash 513696534, now seen corresponding path program 56 times [2020-10-14 05:22:35,128 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:22:35,128 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [354293064] [2020-10-14 05:22:35,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:22:35,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:22:35,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:22:35,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:22:40,143 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:22:40,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-14 05:22:40,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:22:40,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 05:22:40,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:22:40,144 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:22:40,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-14 05:22:40,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 78 [2020-10-14 05:22:40,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-14 05:22:40,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:22:40,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:22:40,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:22:40,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:22:40,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:22:40,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:22:40,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:22:40,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:22:40,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:22:40,480 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:22:40,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:22:40,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:22:40,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:22:40,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:22:40,489 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 1598 proven. 529 refuted. 0 times theorem prover too weak. 1122 trivial. 0 not checked. [2020-10-14 05:22:40,489 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [354293064] [2020-10-14 05:22:40,489 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:22:40,489 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-14 05:22:40,489 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804142514] [2020-10-14 05:22:40,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-14 05:22:40,490 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:22:40,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-14 05:22:40,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-10-14 05:22:40,490 INFO L87 Difference]: Start difference. First operand 125 states and 148 transitions. Second operand 26 states. [2020-10-14 05:22:40,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:22:40,620 INFO L93 Difference]: Finished difference Result 133 states and 158 transitions. [2020-10-14 05:22:40,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-14 05:22:40,621 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 124 [2020-10-14 05:22:40,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:22:40,622 INFO L225 Difference]: With dead ends: 133 [2020-10-14 05:22:40,622 INFO L226 Difference]: Without dead ends: 128 [2020-10-14 05:22:40,623 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-10-14 05:22:40,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-14 05:22:40,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2020-10-14 05:22:40,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-14 05:22:40,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 151 transitions. [2020-10-14 05:22:40,627 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 151 transitions. Word has length 124 [2020-10-14 05:22:40,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:22:40,628 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 151 transitions. [2020-10-14 05:22:40,628 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-14 05:22:40,628 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 151 transitions. [2020-10-14 05:22:40,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-14 05:22:40,629 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:22:40,629 INFO L422 BasicCegarLoop]: trace histogram [58, 34, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:22:40,629 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-14 05:22:40,629 INFO L427 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:22:40,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:22:40,629 INFO L82 PathProgramCache]: Analyzing trace with hash 844168081, now seen corresponding path program 57 times [2020-10-14 05:22:40,630 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:22:40,630 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1134065020] [2020-10-14 05:22:40,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:22:40,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:22:40,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:22:41,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:22:45,647 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:22:45,647 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-14 05:22:45,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:22:45,647 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 05:22:45,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:22:45,647 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:22:45,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-14 05:22:45,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:22:45,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-14 05:22:45,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:22:46,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:22:46,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:22:46,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:22:46,308 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:22:46,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:22:46,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:22:46,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:22:46,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:22:46,309 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:22:46,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:22:46,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:22:46,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:22:46,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:22:46,319 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 1645 proven. 1190 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2020-10-14 05:22:46,319 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1134065020] [2020-10-14 05:22:46,319 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:22:46,319 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-14 05:22:46,320 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287372820] [2020-10-14 05:22:46,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-14 05:22:46,320 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:22:46,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-14 05:22:46,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-10-14 05:22:46,320 INFO L87 Difference]: Start difference. First operand 127 states and 151 transitions. Second operand 37 states. [2020-10-14 05:22:46,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:22:46,439 INFO L93 Difference]: Finished difference Result 183 states and 232 transitions. [2020-10-14 05:22:46,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-14 05:22:46,440 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 126 [2020-10-14 05:22:46,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:22:46,441 INFO L225 Difference]: With dead ends: 183 [2020-10-14 05:22:46,441 INFO L226 Difference]: Without dead ends: 129 [2020-10-14 05:22:46,442 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-10-14 05:22:46,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-14 05:22:46,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2020-10-14 05:22:46,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-14 05:22:46,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 153 transitions. [2020-10-14 05:22:46,449 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 153 transitions. Word has length 126 [2020-10-14 05:22:46,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:22:46,450 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 153 transitions. [2020-10-14 05:22:46,450 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-14 05:22:46,450 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 153 transitions. [2020-10-14 05:22:46,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-10-14 05:22:46,454 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:22:46,454 INFO L422 BasicCegarLoop]: trace histogram [59, 35, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:22:46,454 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-14 05:22:46,454 INFO L427 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:22:46,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:22:46,455 INFO L82 PathProgramCache]: Analyzing trace with hash -276274162, now seen corresponding path program 58 times [2020-10-14 05:22:46,455 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:22:46,455 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1990691037] [2020-10-14 05:22:46,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:22:46,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:22:46,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:22:46,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:22:51,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:22:51,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-10-14 05:22:51,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:22:51,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 05:22:51,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:22:51,474 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:22:51,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-14 05:22:51,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 80 [2020-10-14 05:22:51,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-14 05:22:51,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:22:51,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:22:51,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:22:51,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:22:51,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:22:51,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:22:51,851 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:22:51,851 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:22:51,851 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:22:51,851 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:22:51,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:22:51,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:22:51,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:22:51,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:22:51,860 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 1715 proven. 576 refuted. 0 times theorem prover too weak. 1190 trivial. 0 not checked. [2020-10-14 05:22:51,861 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1990691037] [2020-10-14 05:22:51,861 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:22:51,861 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-14 05:22:51,861 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342765424] [2020-10-14 05:22:51,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-14 05:22:51,861 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:22:51,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-14 05:22:51,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-10-14 05:22:51,862 INFO L87 Difference]: Start difference. First operand 129 states and 153 transitions. Second operand 27 states. [2020-10-14 05:22:52,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:22:52,014 INFO L93 Difference]: Finished difference Result 137 states and 163 transitions. [2020-10-14 05:22:52,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-14 05:22:52,015 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 128 [2020-10-14 05:22:52,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:22:52,016 INFO L225 Difference]: With dead ends: 137 [2020-10-14 05:22:52,017 INFO L226 Difference]: Without dead ends: 132 [2020-10-14 05:22:52,017 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-10-14 05:22:52,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-14 05:22:52,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 131. [2020-10-14 05:22:52,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-14 05:22:52,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 156 transitions. [2020-10-14 05:22:52,022 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 156 transitions. Word has length 128 [2020-10-14 05:22:52,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:22:52,022 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 156 transitions. [2020-10-14 05:22:52,022 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-14 05:22:52,022 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 156 transitions. [2020-10-14 05:22:52,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-10-14 05:22:52,023 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:22:52,023 INFO L422 BasicCegarLoop]: trace histogram [60, 35, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:22:52,023 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-10-14 05:22:52,024 INFO L427 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:22:52,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:22:52,024 INFO L82 PathProgramCache]: Analyzing trace with hash 1891540617, now seen corresponding path program 59 times [2020-10-14 05:22:52,024 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:22:52,024 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1134712679] [2020-10-14 05:22:52,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:22:52,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:22:52,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:22:52,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:22:57,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:22:57,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 138 [2020-10-14 05:22:57,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:22:57,042 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 05:22:57,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:22:57,043 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:22:57,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-14 05:22:57,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:22:57,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-14 05:22:57,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:22:57,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:22:57,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:22:57,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:22:57,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:22:57,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:22:57,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:22:57,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:22:57,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:22:57,779 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:22:57,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:22:57,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:22:57,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:22:57,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:22:57,790 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 1764 proven. 1260 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2020-10-14 05:22:57,790 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1134712679] [2020-10-14 05:22:57,790 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:22:57,790 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-14 05:22:57,790 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164214589] [2020-10-14 05:22:57,791 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-14 05:22:57,791 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:22:57,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-14 05:22:57,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-10-14 05:22:57,791 INFO L87 Difference]: Start difference. First operand 131 states and 156 transitions. Second operand 38 states. [2020-10-14 05:22:57,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:22:57,941 INFO L93 Difference]: Finished difference Result 189 states and 240 transitions. [2020-10-14 05:22:57,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-14 05:22:57,941 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 130 [2020-10-14 05:22:57,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:22:57,943 INFO L225 Difference]: With dead ends: 189 [2020-10-14 05:22:57,944 INFO L226 Difference]: Without dead ends: 133 [2020-10-14 05:22:57,944 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-10-14 05:22:57,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-14 05:22:57,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2020-10-14 05:22:57,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-14 05:22:57,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 158 transitions. [2020-10-14 05:22:57,949 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 158 transitions. Word has length 130 [2020-10-14 05:22:57,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:22:57,950 INFO L479 AbstractCegarLoop]: Abstraction has 133 states and 158 transitions. [2020-10-14 05:22:57,950 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-14 05:22:57,950 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 158 transitions. [2020-10-14 05:22:57,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-10-14 05:22:57,951 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:22:57,951 INFO L422 BasicCegarLoop]: trace histogram [61, 36, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:22:57,951 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-10-14 05:22:57,951 INFO L427 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:22:57,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:22:57,952 INFO L82 PathProgramCache]: Analyzing trace with hash 2061729926, now seen corresponding path program 60 times [2020-10-14 05:22:57,952 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:22:57,952 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1253565493] [2020-10-14 05:22:57,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:22:57,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:22:57,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:22:58,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:23:02,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:23:02,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 140 [2020-10-14 05:23:02,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:23:02,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 05:23:02,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:23:02,971 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:23:02,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-14 05:23:02,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 82 [2020-10-14 05:23:02,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-14 05:23:02,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:23:03,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:23:03,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:23:03,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:23:03,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:23:03,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:23:03,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:23:03,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:23:03,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:23:03,387 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:23:03,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:23:03,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:23:03,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:23:03,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:23:03,397 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 1836 proven. 625 refuted. 0 times theorem prover too weak. 1260 trivial. 0 not checked. [2020-10-14 05:23:03,397 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1253565493] [2020-10-14 05:23:03,397 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:23:03,397 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-14 05:23:03,398 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789514568] [2020-10-14 05:23:03,398 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-14 05:23:03,398 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:23:03,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-14 05:23:03,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-10-14 05:23:03,398 INFO L87 Difference]: Start difference. First operand 133 states and 158 transitions. Second operand 28 states. [2020-10-14 05:23:03,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:23:03,546 INFO L93 Difference]: Finished difference Result 141 states and 168 transitions. [2020-10-14 05:23:03,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-14 05:23:03,546 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 132 [2020-10-14 05:23:03,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:23:03,548 INFO L225 Difference]: With dead ends: 141 [2020-10-14 05:23:03,548 INFO L226 Difference]: Without dead ends: 136 [2020-10-14 05:23:03,548 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-10-14 05:23:03,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-14 05:23:03,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 135. [2020-10-14 05:23:03,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-14 05:23:03,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 161 transitions. [2020-10-14 05:23:03,554 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 161 transitions. Word has length 132 [2020-10-14 05:23:03,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:23:03,554 INFO L479 AbstractCegarLoop]: Abstraction has 135 states and 161 transitions. [2020-10-14 05:23:03,554 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-14 05:23:03,554 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 161 transitions. [2020-10-14 05:23:03,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-10-14 05:23:03,555 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:23:03,556 INFO L422 BasicCegarLoop]: trace histogram [62, 36, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:23:03,556 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-10-14 05:23:03,556 INFO L427 AbstractCegarLoop]: === Iteration 63 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:23:03,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:23:03,556 INFO L82 PathProgramCache]: Analyzing trace with hash -1849393919, now seen corresponding path program 61 times [2020-10-14 05:23:03,556 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:23:03,557 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1803111792] [2020-10-14 05:23:03,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:23:03,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:23:03,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:23:03,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:23:08,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:23:08,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 142 [2020-10-14 05:23:08,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:23:08,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 05:23:08,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:23:08,578 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:23:08,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-14 05:23:08,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:23:08,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-14 05:23:08,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:23:09,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:23:09,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:23:09,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:23:09,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:23:09,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:23:09,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:23:09,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:23:09,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:23:09,315 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:23:09,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:23:09,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:23:09,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:23:09,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:23:09,326 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 1887 proven. 1332 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2020-10-14 05:23:09,326 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1803111792] [2020-10-14 05:23:09,326 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:23:09,326 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-14 05:23:09,327 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163946414] [2020-10-14 05:23:09,327 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-14 05:23:09,327 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:23:09,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-14 05:23:09,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-10-14 05:23:09,328 INFO L87 Difference]: Start difference. First operand 135 states and 161 transitions. Second operand 39 states. [2020-10-14 05:23:09,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:23:09,435 INFO L93 Difference]: Finished difference Result 195 states and 248 transitions. [2020-10-14 05:23:09,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-14 05:23:09,436 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 134 [2020-10-14 05:23:09,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:23:09,437 INFO L225 Difference]: With dead ends: 195 [2020-10-14 05:23:09,437 INFO L226 Difference]: Without dead ends: 137 [2020-10-14 05:23:09,438 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-10-14 05:23:09,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-14 05:23:09,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2020-10-14 05:23:09,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-14 05:23:09,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 163 transitions. [2020-10-14 05:23:09,442 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 163 transitions. Word has length 134 [2020-10-14 05:23:09,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:23:09,443 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 163 transitions. [2020-10-14 05:23:09,443 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-14 05:23:09,443 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 163 transitions. [2020-10-14 05:23:09,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-10-14 05:23:09,445 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:23:09,445 INFO L422 BasicCegarLoop]: trace histogram [63, 37, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:23:09,445 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-10-14 05:23:09,446 INFO L427 AbstractCegarLoop]: === Iteration 64 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:23:09,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:23:09,446 INFO L82 PathProgramCache]: Analyzing trace with hash 1518213246, now seen corresponding path program 62 times [2020-10-14 05:23:09,446 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:23:09,446 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [934263295] [2020-10-14 05:23:09,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:23:09,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:23:09,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:23:09,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:23:14,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:23:14,465 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-10-14 05:23:14,465 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:23:14,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 05:23:14,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:23:14,466 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:23:14,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-14 05:23:14,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:23:14,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-14 05:23:14,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:23:15,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:23:15,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:23:15,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:23:15,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:23:15,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:23:15,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:23:15,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:23:15,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:23:15,289 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:23:15,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:23:15,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:23:15,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:23:15,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:23:15,302 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 1938 proven. 1406 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2020-10-14 05:23:15,302 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [934263295] [2020-10-14 05:23:15,303 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:23:15,303 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-14 05:23:15,303 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59796764] [2020-10-14 05:23:15,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-14 05:23:15,304 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:23:15,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-14 05:23:15,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-10-14 05:23:15,305 INFO L87 Difference]: Start difference. First operand 137 states and 163 transitions. Second operand 40 states. [2020-10-14 05:23:15,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:23:15,469 INFO L93 Difference]: Finished difference Result 197 states and 250 transitions. [2020-10-14 05:23:15,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-14 05:23:15,470 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 136 [2020-10-14 05:23:15,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:23:15,471 INFO L225 Difference]: With dead ends: 197 [2020-10-14 05:23:15,471 INFO L226 Difference]: Without dead ends: 139 [2020-10-14 05:23:15,472 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-10-14 05:23:15,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-14 05:23:15,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2020-10-14 05:23:15,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-14 05:23:15,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 165 transitions. [2020-10-14 05:23:15,477 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 165 transitions. Word has length 136 [2020-10-14 05:23:15,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:23:15,478 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 165 transitions. [2020-10-14 05:23:15,478 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-14 05:23:15,478 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 165 transitions. [2020-10-14 05:23:15,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-10-14 05:23:15,479 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:23:15,479 INFO L422 BasicCegarLoop]: trace histogram [64, 38, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:23:15,479 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2020-10-14 05:23:15,479 INFO L427 AbstractCegarLoop]: === Iteration 65 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:23:15,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:23:15,480 INFO L82 PathProgramCache]: Analyzing trace with hash -616642373, now seen corresponding path program 63 times [2020-10-14 05:23:15,480 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:23:15,480 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [699957391] [2020-10-14 05:23:15,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:23:15,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:23:15,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:23:15,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:23:20,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:23:20,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 146 [2020-10-14 05:23:20,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:23:20,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 05:23:20,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:23:20,502 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:23:20,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-14 05:23:20,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 86 [2020-10-14 05:23:20,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-14 05:23:20,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:23:20,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:23:20,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:23:20,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:23:20,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:23:20,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:23:20,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:23:20,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:23:20,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:23:20,936 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:23:20,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:23:20,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:23:20,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:23:20,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:23:20,952 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 2014 proven. 676 refuted. 0 times theorem prover too weak. 1406 trivial. 0 not checked. [2020-10-14 05:23:20,952 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [699957391] [2020-10-14 05:23:20,952 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:23:20,953 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-14 05:23:20,953 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027719262] [2020-10-14 05:23:20,953 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-14 05:23:20,953 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:23:20,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-14 05:23:20,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-10-14 05:23:20,956 INFO L87 Difference]: Start difference. First operand 139 states and 165 transitions. Second operand 29 states. [2020-10-14 05:23:21,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:23:21,108 INFO L93 Difference]: Finished difference Result 147 states and 175 transitions. [2020-10-14 05:23:21,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-14 05:23:21,109 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 138 [2020-10-14 05:23:21,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:23:21,111 INFO L225 Difference]: With dead ends: 147 [2020-10-14 05:23:21,111 INFO L226 Difference]: Without dead ends: 142 [2020-10-14 05:23:21,111 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-10-14 05:23:21,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-14 05:23:21,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 141. [2020-10-14 05:23:21,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-14 05:23:21,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 168 transitions. [2020-10-14 05:23:21,116 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 168 transitions. Word has length 138 [2020-10-14 05:23:21,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:23:21,117 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 168 transitions. [2020-10-14 05:23:21,117 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-14 05:23:21,117 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 168 transitions. [2020-10-14 05:23:21,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-10-14 05:23:21,118 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:23:21,118 INFO L422 BasicCegarLoop]: trace histogram [65, 38, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:23:21,118 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2020-10-14 05:23:21,119 INFO L427 AbstractCegarLoop]: === Iteration 66 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:23:21,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:23:21,119 INFO L82 PathProgramCache]: Analyzing trace with hash 1215204342, now seen corresponding path program 64 times [2020-10-14 05:23:21,119 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:23:21,119 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1559642667] [2020-10-14 05:23:21,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:23:21,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:23:21,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:23:21,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:23:26,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:23:26,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-10-14 05:23:26,139 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:23:26,139 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 05:23:26,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:23:26,140 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:23:26,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-14 05:23:26,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:23:26,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-14 05:23:26,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:23:26,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:23:26,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:23:26,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:23:26,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:23:26,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:23:26,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:23:26,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:23:26,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:23:26,957 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:23:26,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:23:26,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:23:26,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:23:26,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:23:26,970 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 2067 proven. 1482 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2020-10-14 05:23:26,970 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1559642667] [2020-10-14 05:23:26,970 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:23:26,970 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-14 05:23:26,971 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355326678] [2020-10-14 05:23:26,971 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-14 05:23:26,971 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:23:26,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-14 05:23:26,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-10-14 05:23:26,972 INFO L87 Difference]: Start difference. First operand 141 states and 168 transitions. Second operand 41 states. [2020-10-14 05:23:27,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:23:27,120 INFO L93 Difference]: Finished difference Result 203 states and 258 transitions. [2020-10-14 05:23:27,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-14 05:23:27,121 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 140 [2020-10-14 05:23:27,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:23:27,122 INFO L225 Difference]: With dead ends: 203 [2020-10-14 05:23:27,122 INFO L226 Difference]: Without dead ends: 143 [2020-10-14 05:23:27,123 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-10-14 05:23:27,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-14 05:23:27,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2020-10-14 05:23:27,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-14 05:23:27,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 170 transitions. [2020-10-14 05:23:27,127 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 170 transitions. Word has length 140 [2020-10-14 05:23:27,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:23:27,128 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 170 transitions. [2020-10-14 05:23:27,128 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-14 05:23:27,128 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 170 transitions. [2020-10-14 05:23:27,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-10-14 05:23:27,129 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:23:27,129 INFO L422 BasicCegarLoop]: trace histogram [66, 39, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:23:27,129 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2020-10-14 05:23:27,129 INFO L427 AbstractCegarLoop]: === Iteration 67 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:23:27,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:23:27,130 INFO L82 PathProgramCache]: Analyzing trace with hash 481482163, now seen corresponding path program 65 times [2020-10-14 05:23:27,130 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:23:27,130 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [595794117] [2020-10-14 05:23:27,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:23:27,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:23:27,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:23:27,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:23:32,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:23:32,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 150 [2020-10-14 05:23:32,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:23:32,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-14 05:23:32,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:23:32,148 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:23:32,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-14 05:23:32,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 88 [2020-10-14 05:23:32,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-14 05:23:32,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:23:32,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:23:32,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:23:32,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:23:32,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:23:32,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:23:32,614 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:23:32,614 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:23:32,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:23:32,614 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:23:32,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:23:32,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:23:32,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:23:32,615 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:23:32,625 INFO L134 CoverageAnalysis]: Checked inductivity of 4356 backedges. 2145 proven. 729 refuted. 0 times theorem prover too weak. 1482 trivial. 0 not checked. [2020-10-14 05:23:32,626 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [595794117] [2020-10-14 05:23:32,626 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:23:32,626 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-14 05:23:32,626 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564713575] [2020-10-14 05:23:32,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-14 05:23:32,627 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:23:32,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-14 05:23:32,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-10-14 05:23:32,628 INFO L87 Difference]: Start difference. First operand 143 states and 170 transitions. Second operand 30 states. [2020-10-14 05:23:32,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:23:32,762 INFO L93 Difference]: Finished difference Result 151 states and 180 transitions. [2020-10-14 05:23:32,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-14 05:23:32,762 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 142 [2020-10-14 05:23:32,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:23:32,763 INFO L225 Difference]: With dead ends: 151 [2020-10-14 05:23:32,763 INFO L226 Difference]: Without dead ends: 146 [2020-10-14 05:23:32,764 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-10-14 05:23:32,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-14 05:23:32,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 145. [2020-10-14 05:23:32,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-14 05:23:32,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 173 transitions. [2020-10-14 05:23:32,768 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 173 transitions. Word has length 142 [2020-10-14 05:23:32,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:23:32,769 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 173 transitions. [2020-10-14 05:23:32,769 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-14 05:23:32,769 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 173 transitions. [2020-10-14 05:23:32,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-10-14 05:23:32,770 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:23:32,770 INFO L422 BasicCegarLoop]: trace histogram [67, 39, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:23:32,770 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2020-10-14 05:23:32,770 INFO L427 AbstractCegarLoop]: === Iteration 68 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:23:32,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:23:32,771 INFO L82 PathProgramCache]: Analyzing trace with hash -49071378, now seen corresponding path program 66 times [2020-10-14 05:23:32,771 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:23:32,771 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1341173850] [2020-10-14 05:23:32,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:23:32,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:23:32,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:23:33,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:23:37,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:23:37,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 152 [2020-10-14 05:23:37,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:23:37,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-14 05:23:37,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:23:37,794 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:23:37,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-14 05:23:37,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:23:37,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-14 05:23:37,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:23:38,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:23:38,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:23:38,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:23:38,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:23:38,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:23:38,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:23:38,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:23:38,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:23:38,697 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:23:38,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:23:38,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:23:38,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:23:38,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:23:38,710 INFO L134 CoverageAnalysis]: Checked inductivity of 4489 backedges. 2200 proven. 1560 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2020-10-14 05:23:38,711 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1341173850] [2020-10-14 05:23:38,711 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:23:38,711 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-14 05:23:38,711 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187970013] [2020-10-14 05:23:38,711 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-14 05:23:38,711 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:23:38,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-14 05:23:38,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-10-14 05:23:38,712 INFO L87 Difference]: Start difference. First operand 145 states and 173 transitions. Second operand 42 states. [2020-10-14 05:23:38,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:23:38,904 INFO L93 Difference]: Finished difference Result 209 states and 266 transitions. [2020-10-14 05:23:38,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-14 05:23:38,904 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 144 [2020-10-14 05:23:38,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:23:38,906 INFO L225 Difference]: With dead ends: 209 [2020-10-14 05:23:38,906 INFO L226 Difference]: Without dead ends: 147 [2020-10-14 05:23:38,906 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-10-14 05:23:38,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-14 05:23:38,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2020-10-14 05:23:38,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-14 05:23:38,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 175 transitions. [2020-10-14 05:23:38,911 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 175 transitions. Word has length 144 [2020-10-14 05:23:38,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:23:38,911 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 175 transitions. [2020-10-14 05:23:38,911 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-14 05:23:38,911 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 175 transitions. [2020-10-14 05:23:38,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-10-14 05:23:38,912 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:23:38,912 INFO L422 BasicCegarLoop]: trace histogram [68, 40, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:23:38,912 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2020-10-14 05:23:38,913 INFO L427 AbstractCegarLoop]: === Iteration 69 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:23:38,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:23:38,913 INFO L82 PathProgramCache]: Analyzing trace with hash 510811691, now seen corresponding path program 67 times [2020-10-14 05:23:38,913 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:23:38,913 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1202434713] [2020-10-14 05:23:38,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:23:38,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:23:38,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:23:39,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:23:43,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:23:43,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 154 [2020-10-14 05:23:43,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:23:43,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-14 05:23:43,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:23:43,931 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:23:43,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-14 05:23:43,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:23:43,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-14 05:23:43,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:23:44,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:23:44,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:23:44,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:23:44,843 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:23:44,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:23:44,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:23:44,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:23:44,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:23:44,843 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:23:44,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:23:44,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:23:44,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:23:44,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:23:44,857 INFO L134 CoverageAnalysis]: Checked inductivity of 4624 backedges. 2255 proven. 1640 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2020-10-14 05:23:44,857 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1202434713] [2020-10-14 05:23:44,858 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:23:44,858 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-14 05:23:44,858 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710010751] [2020-10-14 05:23:44,858 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-14 05:23:44,858 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:23:44,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-14 05:23:44,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-10-14 05:23:44,859 INFO L87 Difference]: Start difference. First operand 147 states and 175 transitions. Second operand 43 states. [2020-10-14 05:23:45,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:23:45,006 INFO L93 Difference]: Finished difference Result 211 states and 268 transitions. [2020-10-14 05:23:45,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-14 05:23:45,006 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 146 [2020-10-14 05:23:45,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:23:45,007 INFO L225 Difference]: With dead ends: 211 [2020-10-14 05:23:45,007 INFO L226 Difference]: Without dead ends: 149 [2020-10-14 05:23:45,007 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-10-14 05:23:45,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-14 05:23:45,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2020-10-14 05:23:45,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-10-14 05:23:45,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 177 transitions. [2020-10-14 05:23:45,012 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 177 transitions. Word has length 146 [2020-10-14 05:23:45,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:23:45,013 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 177 transitions. [2020-10-14 05:23:45,013 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-14 05:23:45,013 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 177 transitions. [2020-10-14 05:23:45,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-10-14 05:23:45,014 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:23:45,014 INFO L422 BasicCegarLoop]: trace histogram [69, 41, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:23:45,014 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2020-10-14 05:23:45,014 INFO L427 AbstractCegarLoop]: === Iteration 70 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:23:45,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:23:45,015 INFO L82 PathProgramCache]: Analyzing trace with hash 1687529000, now seen corresponding path program 68 times [2020-10-14 05:23:45,015 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:23:45,015 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1173096479] [2020-10-14 05:23:45,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:23:45,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:23:45,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:23:45,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:23:50,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:23:50,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 156 [2020-10-14 05:23:50,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:23:50,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 05:23:50,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:23:50,036 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:23:50,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-14 05:23:50,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 92 [2020-10-14 05:23:50,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-14 05:23:50,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:23:50,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:23:50,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:23:50,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:23:50,535 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:23:50,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:23:50,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:23:50,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:23:50,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:23:50,536 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:23:50,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:23:50,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:23:50,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:23:50,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:23:50,551 INFO L134 CoverageAnalysis]: Checked inductivity of 4761 backedges. 2337 proven. 784 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2020-10-14 05:23:50,551 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1173096479] [2020-10-14 05:23:50,552 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:23:50,552 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-14 05:23:50,552 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616040083] [2020-10-14 05:23:50,552 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-14 05:23:50,552 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:23:50,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-14 05:23:50,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-10-14 05:23:50,553 INFO L87 Difference]: Start difference. First operand 149 states and 177 transitions. Second operand 31 states. [2020-10-14 05:23:50,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:23:50,720 INFO L93 Difference]: Finished difference Result 157 states and 187 transitions. [2020-10-14 05:23:50,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-14 05:23:50,721 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 148 [2020-10-14 05:23:50,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:23:50,722 INFO L225 Difference]: With dead ends: 157 [2020-10-14 05:23:50,722 INFO L226 Difference]: Without dead ends: 152 [2020-10-14 05:23:50,722 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-10-14 05:23:50,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-10-14 05:23:50,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 151. [2020-10-14 05:23:50,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-14 05:23:50,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 180 transitions. [2020-10-14 05:23:50,727 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 180 transitions. Word has length 148 [2020-10-14 05:23:50,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:23:50,727 INFO L479 AbstractCegarLoop]: Abstraction has 151 states and 180 transitions. [2020-10-14 05:23:50,727 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-14 05:23:50,727 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 180 transitions. [2020-10-14 05:23:50,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-10-14 05:23:50,728 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:23:50,728 INFO L422 BasicCegarLoop]: trace histogram [70, 41, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:23:50,728 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2020-10-14 05:23:50,729 INFO L427 AbstractCegarLoop]: === Iteration 71 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:23:50,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:23:50,729 INFO L82 PathProgramCache]: Analyzing trace with hash -679230941, now seen corresponding path program 69 times [2020-10-14 05:23:50,729 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:23:50,729 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [279138480] [2020-10-14 05:23:50,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:23:50,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:23:50,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:23:50,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:23:55,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:23:55,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 158 [2020-10-14 05:23:55,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:23:55,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-14 05:23:55,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:23:55,752 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:23:55,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-14 05:23:55,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:23:55,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 85 [2020-10-14 05:23:55,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:23:56,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:23:56,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:23:56,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:23:56,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:23:56,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:23:56,720 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:23:56,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:23:56,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:23:56,721 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:23:56,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:23:56,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:23:56,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:23:56,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:23:56,734 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 2394 proven. 1722 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2020-10-14 05:23:56,734 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [279138480] [2020-10-14 05:23:56,734 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:23:56,734 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-14 05:23:56,735 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821886164] [2020-10-14 05:23:56,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-14 05:23:56,735 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:23:56,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-14 05:23:56,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2020-10-14 05:23:56,736 INFO L87 Difference]: Start difference. First operand 151 states and 180 transitions. Second operand 44 states. [2020-10-14 05:23:56,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:23:56,908 INFO L93 Difference]: Finished difference Result 217 states and 276 transitions. [2020-10-14 05:23:56,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-14 05:23:56,909 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 150 [2020-10-14 05:23:56,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:23:56,910 INFO L225 Difference]: With dead ends: 217 [2020-10-14 05:23:56,911 INFO L226 Difference]: Without dead ends: 153 [2020-10-14 05:23:56,911 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2020-10-14 05:23:56,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-14 05:23:56,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2020-10-14 05:23:56,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-10-14 05:23:56,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 182 transitions. [2020-10-14 05:23:56,915 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 182 transitions. Word has length 150 [2020-10-14 05:23:56,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:23:56,916 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 182 transitions. [2020-10-14 05:23:56,916 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-14 05:23:56,916 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 182 transitions. [2020-10-14 05:23:56,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-10-14 05:23:56,917 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:23:56,917 INFO L422 BasicCegarLoop]: trace histogram [71, 42, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:23:56,917 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2020-10-14 05:23:56,917 INFO L427 AbstractCegarLoop]: === Iteration 72 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:23:56,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:23:56,918 INFO L82 PathProgramCache]: Analyzing trace with hash 1251525536, now seen corresponding path program 70 times [2020-10-14 05:23:56,918 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:23:56,918 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [435648639] [2020-10-14 05:23:56,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:23:56,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:23:56,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:23:57,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:01,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:01,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 160 [2020-10-14 05:24:01,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:24:01,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 05:24:01,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:01,932 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:01,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-14 05:24:01,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 94 [2020-10-14 05:24:01,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-14 05:24:01,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:24:02,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:24:02,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:02,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:02,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:02,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:24:02,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:24:02,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:24:02,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:02,443 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:02,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:24:02,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:24:02,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:24:02,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:24:02,456 INFO L134 CoverageAnalysis]: Checked inductivity of 5041 backedges. 2478 proven. 841 refuted. 0 times theorem prover too weak. 1722 trivial. 0 not checked. [2020-10-14 05:24:02,456 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [435648639] [2020-10-14 05:24:02,457 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:24:02,457 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-14 05:24:02,457 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587751440] [2020-10-14 05:24:02,457 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-14 05:24:02,457 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:24:02,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-14 05:24:02,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-10-14 05:24:02,458 INFO L87 Difference]: Start difference. First operand 153 states and 182 transitions. Second operand 32 states. [2020-10-14 05:24:02,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:24:02,647 INFO L93 Difference]: Finished difference Result 161 states and 192 transitions. [2020-10-14 05:24:02,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-14 05:24:02,647 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 152 [2020-10-14 05:24:02,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:24:02,649 INFO L225 Difference]: With dead ends: 161 [2020-10-14 05:24:02,649 INFO L226 Difference]: Without dead ends: 156 [2020-10-14 05:24:02,650 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-10-14 05:24:02,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-10-14 05:24:02,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 155. [2020-10-14 05:24:02,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-10-14 05:24:02,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 185 transitions. [2020-10-14 05:24:02,656 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 185 transitions. Word has length 152 [2020-10-14 05:24:02,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:24:02,656 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 185 transitions. [2020-10-14 05:24:02,656 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-14 05:24:02,657 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 185 transitions. [2020-10-14 05:24:02,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-10-14 05:24:02,658 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:24:02,658 INFO L422 BasicCegarLoop]: trace histogram [72, 42, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:24:02,658 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2020-10-14 05:24:02,659 INFO L427 AbstractCegarLoop]: === Iteration 73 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:24:02,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:24:02,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1228235163, now seen corresponding path program 71 times [2020-10-14 05:24:02,659 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:24:02,660 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [266719113] [2020-10-14 05:24:02,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:24:02,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:02,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:03,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:07,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:07,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 162 [2020-10-14 05:24:07,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:24:07,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-14 05:24:07,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:07,686 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:07,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-14 05:24:07,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:24:07,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-14 05:24:07,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:24:08,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:24:08,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:08,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:08,729 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:08,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:24:08,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:24:08,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:24:08,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:08,730 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:08,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:24:08,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:24:08,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:24:08,731 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:24:08,743 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 2537 proven. 1806 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2020-10-14 05:24:08,743 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [266719113] [2020-10-14 05:24:08,744 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:24:08,744 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-14 05:24:08,744 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364045355] [2020-10-14 05:24:08,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-14 05:24:08,744 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:24:08,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-14 05:24:08,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-10-14 05:24:08,745 INFO L87 Difference]: Start difference. First operand 155 states and 185 transitions. Second operand 45 states. [2020-10-14 05:24:08,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:24:08,899 INFO L93 Difference]: Finished difference Result 223 states and 284 transitions. [2020-10-14 05:24:08,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-14 05:24:08,899 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 154 [2020-10-14 05:24:08,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:24:08,901 INFO L225 Difference]: With dead ends: 223 [2020-10-14 05:24:08,901 INFO L226 Difference]: Without dead ends: 157 [2020-10-14 05:24:08,901 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-10-14 05:24:08,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-10-14 05:24:08,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2020-10-14 05:24:08,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-14 05:24:08,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 187 transitions. [2020-10-14 05:24:08,908 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 187 transitions. Word has length 154 [2020-10-14 05:24:08,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:24:08,909 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 187 transitions. [2020-10-14 05:24:08,909 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-14 05:24:08,909 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 187 transitions. [2020-10-14 05:24:08,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-10-14 05:24:08,910 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:24:08,910 INFO L422 BasicCegarLoop]: trace histogram [73, 43, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:24:08,910 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2020-10-14 05:24:08,910 INFO L427 AbstractCegarLoop]: === Iteration 74 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:24:08,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:24:08,911 INFO L82 PathProgramCache]: Analyzing trace with hash 1052990616, now seen corresponding path program 72 times [2020-10-14 05:24:08,911 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:24:08,911 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [821794858] [2020-10-14 05:24:08,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:24:08,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:08,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:09,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:13,933 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:13,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 164 [2020-10-14 05:24:13,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:24:13,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-14 05:24:13,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:13,934 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:13,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-14 05:24:13,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 96 [2020-10-14 05:24:13,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-14 05:24:13,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:24:14,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:24:14,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:14,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:14,507 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:14,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:24:14,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:24:14,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:24:14,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:14,508 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:14,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:24:14,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:24:14,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:24:14,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:24:14,520 INFO L134 CoverageAnalysis]: Checked inductivity of 5329 backedges. 2623 proven. 900 refuted. 0 times theorem prover too weak. 1806 trivial. 0 not checked. [2020-10-14 05:24:14,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [821794858] [2020-10-14 05:24:14,521 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:24:14,521 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-14 05:24:14,521 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798627786] [2020-10-14 05:24:14,521 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-14 05:24:14,521 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:24:14,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-14 05:24:14,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 05:24:14,522 INFO L87 Difference]: Start difference. First operand 157 states and 187 transitions. Second operand 33 states. [2020-10-14 05:24:14,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:24:14,695 INFO L93 Difference]: Finished difference Result 165 states and 197 transitions. [2020-10-14 05:24:14,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-14 05:24:14,696 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 156 [2020-10-14 05:24:14,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:24:14,697 INFO L225 Difference]: With dead ends: 165 [2020-10-14 05:24:14,697 INFO L226 Difference]: Without dead ends: 160 [2020-10-14 05:24:14,698 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 05:24:14,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-14 05:24:14,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 159. [2020-10-14 05:24:14,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-14 05:24:14,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 190 transitions. [2020-10-14 05:24:14,702 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 190 transitions. Word has length 156 [2020-10-14 05:24:14,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:24:14,703 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 190 transitions. [2020-10-14 05:24:14,703 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-14 05:24:14,703 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 190 transitions. [2020-10-14 05:24:14,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-10-14 05:24:14,704 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:24:14,704 INFO L422 BasicCegarLoop]: trace histogram [74, 43, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:24:14,704 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2020-10-14 05:24:14,704 INFO L427 AbstractCegarLoop]: === Iteration 75 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:24:14,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:24:14,705 INFO L82 PathProgramCache]: Analyzing trace with hash -585261933, now seen corresponding path program 73 times [2020-10-14 05:24:14,705 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:24:14,705 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1847574523] [2020-10-14 05:24:14,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:24:14,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:14,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:15,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:19,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:19,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 166 [2020-10-14 05:24:19,720 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:24:19,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 05:24:19,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:19,721 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:19,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-14 05:24:19,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:24:19,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 89 [2020-10-14 05:24:19,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:24:20,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:24:20,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:20,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:20,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:20,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:24:20,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:24:20,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:24:20,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:20,819 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:20,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:24:20,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:24:20,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:24:20,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:24:20,834 INFO L134 CoverageAnalysis]: Checked inductivity of 5476 backedges. 2684 proven. 1892 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2020-10-14 05:24:20,834 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1847574523] [2020-10-14 05:24:20,834 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:24:20,834 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-14 05:24:20,834 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778837999] [2020-10-14 05:24:20,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-14 05:24:20,835 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:24:20,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-14 05:24:20,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2020-10-14 05:24:20,836 INFO L87 Difference]: Start difference. First operand 159 states and 190 transitions. Second operand 46 states. [2020-10-14 05:24:20,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:24:20,992 INFO L93 Difference]: Finished difference Result 229 states and 292 transitions. [2020-10-14 05:24:20,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-14 05:24:20,993 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 158 [2020-10-14 05:24:20,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:24:20,994 INFO L225 Difference]: With dead ends: 229 [2020-10-14 05:24:20,994 INFO L226 Difference]: Without dead ends: 161 [2020-10-14 05:24:20,994 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2020-10-14 05:24:20,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-14 05:24:20,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2020-10-14 05:24:20,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-14 05:24:20,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 192 transitions. [2020-10-14 05:24:20,999 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 192 transitions. Word has length 158 [2020-10-14 05:24:20,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:24:20,999 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 192 transitions. [2020-10-14 05:24:20,999 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-14 05:24:20,999 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 192 transitions. [2020-10-14 05:24:21,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-10-14 05:24:21,000 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:24:21,000 INFO L422 BasicCegarLoop]: trace histogram [75, 44, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:24:21,000 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2020-10-14 05:24:21,000 INFO L427 AbstractCegarLoop]: === Iteration 76 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:24:21,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:24:21,000 INFO L82 PathProgramCache]: Analyzing trace with hash 353095952, now seen corresponding path program 74 times [2020-10-14 05:24:21,001 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:24:21,001 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [254974620] [2020-10-14 05:24:21,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:24:21,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:21,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:21,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:26,024 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:26,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 168 [2020-10-14 05:24:26,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:24:26,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-14 05:24:26,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:26,025 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:26,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-14 05:24:26,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:24:26,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 91 [2020-10-14 05:24:26,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:24:27,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:24:27,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:27,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:27,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:27,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:24:27,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:24:27,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:24:27,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:27,166 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:27,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:24:27,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:24:27,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:24:27,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:24:27,180 INFO L134 CoverageAnalysis]: Checked inductivity of 5625 backedges. 2745 proven. 1980 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2020-10-14 05:24:27,180 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [254974620] [2020-10-14 05:24:27,180 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:24:27,180 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-14 05:24:27,181 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859476949] [2020-10-14 05:24:27,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-14 05:24:27,181 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:24:27,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-14 05:24:27,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2020-10-14 05:24:27,182 INFO L87 Difference]: Start difference. First operand 161 states and 192 transitions. Second operand 47 states. [2020-10-14 05:24:27,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:24:27,338 INFO L93 Difference]: Finished difference Result 231 states and 294 transitions. [2020-10-14 05:24:27,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-14 05:24:27,339 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 160 [2020-10-14 05:24:27,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:24:27,340 INFO L225 Difference]: With dead ends: 231 [2020-10-14 05:24:27,340 INFO L226 Difference]: Without dead ends: 163 [2020-10-14 05:24:27,341 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2020-10-14 05:24:27,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-14 05:24:27,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2020-10-14 05:24:27,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-14 05:24:27,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 194 transitions. [2020-10-14 05:24:27,345 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 194 transitions. Word has length 160 [2020-10-14 05:24:27,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:24:27,345 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 194 transitions. [2020-10-14 05:24:27,345 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-14 05:24:27,345 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 194 transitions. [2020-10-14 05:24:27,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-10-14 05:24:27,346 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:24:27,346 INFO L422 BasicCegarLoop]: trace histogram [76, 45, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:24:27,346 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2020-10-14 05:24:27,347 INFO L427 AbstractCegarLoop]: === Iteration 77 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:24:27,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:24:27,347 INFO L82 PathProgramCache]: Analyzing trace with hash 171891277, now seen corresponding path program 75 times [2020-10-14 05:24:27,347 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:24:27,347 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1932006504] [2020-10-14 05:24:27,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:24:27,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:27,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:27,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:32,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:32,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 170 [2020-10-14 05:24:32,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:24:32,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 05:24:32,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:32,366 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:32,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-14 05:24:32,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 100 [2020-10-14 05:24:32,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-14 05:24:32,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:24:32,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:24:32,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:32,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:32,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:32,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:24:32,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:24:32,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:24:32,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:32,977 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:32,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:24:32,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:24:32,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:24:32,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:24:32,993 INFO L134 CoverageAnalysis]: Checked inductivity of 5776 backedges. 2835 proven. 961 refuted. 0 times theorem prover too weak. 1980 trivial. 0 not checked. [2020-10-14 05:24:32,993 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1932006504] [2020-10-14 05:24:32,993 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:24:32,993 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-14 05:24:32,993 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061147018] [2020-10-14 05:24:32,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-14 05:24:32,994 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:24:32,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-14 05:24:32,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-10-14 05:24:32,994 INFO L87 Difference]: Start difference. First operand 163 states and 194 transitions. Second operand 34 states. [2020-10-14 05:24:33,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:24:33,178 INFO L93 Difference]: Finished difference Result 171 states and 204 transitions. [2020-10-14 05:24:33,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-14 05:24:33,178 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 162 [2020-10-14 05:24:33,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:24:33,179 INFO L225 Difference]: With dead ends: 171 [2020-10-14 05:24:33,179 INFO L226 Difference]: Without dead ends: 166 [2020-10-14 05:24:33,180 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-10-14 05:24:33,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-14 05:24:33,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 165. [2020-10-14 05:24:33,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-14 05:24:33,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 197 transitions. [2020-10-14 05:24:33,183 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 197 transitions. Word has length 162 [2020-10-14 05:24:33,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:24:33,183 INFO L479 AbstractCegarLoop]: Abstraction has 165 states and 197 transitions. [2020-10-14 05:24:33,183 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-14 05:24:33,183 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 197 transitions. [2020-10-14 05:24:33,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2020-10-14 05:24:33,184 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:24:33,184 INFO L422 BasicCegarLoop]: trace histogram [77, 45, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:24:33,184 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2020-10-14 05:24:33,184 INFO L427 AbstractCegarLoop]: === Iteration 78 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:24:33,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:24:33,185 INFO L82 PathProgramCache]: Analyzing trace with hash -1213169400, now seen corresponding path program 76 times [2020-10-14 05:24:33,185 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:24:33,185 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [949760904] [2020-10-14 05:24:33,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:24:33,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:33,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:33,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:38,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:38,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 172 [2020-10-14 05:24:38,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:24:38,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 05:24:38,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:38,200 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:38,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-14 05:24:38,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:24:38,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 93 [2020-10-14 05:24:38,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:24:39,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:24:39,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:39,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:39,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:39,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:24:39,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:24:39,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:24:39,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:39,386 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:39,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:24:39,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:24:39,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:24:39,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:24:39,401 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 2898 proven. 2070 refuted. 0 times theorem prover too weak. 961 trivial. 0 not checked. [2020-10-14 05:24:39,402 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [949760904] [2020-10-14 05:24:39,402 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:24:39,402 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-14 05:24:39,402 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165006379] [2020-10-14 05:24:39,402 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-14 05:24:39,402 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:24:39,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-14 05:24:39,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-10-14 05:24:39,403 INFO L87 Difference]: Start difference. First operand 165 states and 197 transitions. Second operand 48 states. [2020-10-14 05:24:39,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:24:39,600 INFO L93 Difference]: Finished difference Result 237 states and 302 transitions. [2020-10-14 05:24:39,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-14 05:24:39,601 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 164 [2020-10-14 05:24:39,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:24:39,602 INFO L225 Difference]: With dead ends: 237 [2020-10-14 05:24:39,602 INFO L226 Difference]: Without dead ends: 167 [2020-10-14 05:24:39,603 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-10-14 05:24:39,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-14 05:24:39,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2020-10-14 05:24:39,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-14 05:24:39,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 199 transitions. [2020-10-14 05:24:39,608 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 199 transitions. Word has length 164 [2020-10-14 05:24:39,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:24:39,609 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 199 transitions. [2020-10-14 05:24:39,609 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-14 05:24:39,609 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 199 transitions. [2020-10-14 05:24:39,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-10-14 05:24:39,610 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:24:39,610 INFO L422 BasicCegarLoop]: trace histogram [78, 46, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:24:39,610 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2020-10-14 05:24:39,610 INFO L427 AbstractCegarLoop]: === Iteration 79 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:24:39,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:24:39,611 INFO L82 PathProgramCache]: Analyzing trace with hash 1569891269, now seen corresponding path program 77 times [2020-10-14 05:24:39,611 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:24:39,611 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [925701458] [2020-10-14 05:24:39,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:24:39,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:39,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:39,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:44,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:44,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 174 [2020-10-14 05:24:44,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:24:44,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 05:24:44,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:44,631 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:44,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-14 05:24:44,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 102 [2020-10-14 05:24:44,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-14 05:24:44,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:24:45,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:24:45,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:45,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:45,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:45,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:24:45,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:24:45,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:24:45,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:45,272 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:45,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:24:45,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:24:45,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:24:45,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:24:45,285 INFO L134 CoverageAnalysis]: Checked inductivity of 6084 backedges. 2990 proven. 1024 refuted. 0 times theorem prover too weak. 2070 trivial. 0 not checked. [2020-10-14 05:24:45,286 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [925701458] [2020-10-14 05:24:45,286 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:24:45,286 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-14 05:24:45,286 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244749523] [2020-10-14 05:24:45,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-14 05:24:45,286 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:24:45,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-14 05:24:45,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-10-14 05:24:45,287 INFO L87 Difference]: Start difference. First operand 167 states and 199 transitions. Second operand 35 states. [2020-10-14 05:24:45,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:24:45,480 INFO L93 Difference]: Finished difference Result 175 states and 209 transitions. [2020-10-14 05:24:45,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-14 05:24:45,481 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 166 [2020-10-14 05:24:45,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:24:45,482 INFO L225 Difference]: With dead ends: 175 [2020-10-14 05:24:45,482 INFO L226 Difference]: Without dead ends: 170 [2020-10-14 05:24:45,483 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-10-14 05:24:45,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-14 05:24:45,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 169. [2020-10-14 05:24:45,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-14 05:24:45,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 202 transitions. [2020-10-14 05:24:45,487 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 202 transitions. Word has length 166 [2020-10-14 05:24:45,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:24:45,487 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 202 transitions. [2020-10-14 05:24:45,487 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-14 05:24:45,488 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 202 transitions. [2020-10-14 05:24:45,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-10-14 05:24:45,488 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:24:45,489 INFO L422 BasicCegarLoop]: trace histogram [79, 46, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:24:45,489 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2020-10-14 05:24:45,489 INFO L427 AbstractCegarLoop]: === Iteration 80 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:24:45,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:24:45,489 INFO L82 PathProgramCache]: Analyzing trace with hash -2059940736, now seen corresponding path program 78 times [2020-10-14 05:24:45,490 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:24:45,490 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1708245605] [2020-10-14 05:24:45,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:24:45,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:24:45,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:46,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:24:50,507 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:24:50,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 176 [2020-10-14 05:24:50,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:24:50,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 05:24:50,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:24:50,508 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:24:50,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-14 05:24:50,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:24:50,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-14 05:24:50,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0