/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --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/loops-crafted-1/loopv3.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 23:59:37,445 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 23:59:37,448 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 23:59:37,491 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 23:59:37,491 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 23:59:37,500 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 23:59:37,501 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 23:59:37,505 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 23:59:37,508 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 23:59:37,512 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 23:59:37,513 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 23:59:37,514 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 23:59:37,514 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 23:59:37,517 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 23:59:37,519 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 23:59:37,521 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 23:59:37,523 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 23:59:37,525 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 23:59:37,527 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 23:59:37,535 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 23:59:37,537 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 23:59:37,538 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 23:59:37,539 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 23:59:37,540 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 23:59:37,552 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 23:59:37,557 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 23:59:37,557 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 23:59:37,558 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 23:59:37,559 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 23:59:37,559 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 23:59:37,560 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 23:59:37,563 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 23:59:37,563 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 23:59:37,564 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 23:59:37,568 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 23:59:37,569 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 23:59:37,569 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 23:59:37,570 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 23:59:37,570 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 23:59:37,571 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 23:59:37,572 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 23:59:37,573 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 23:59:37,609 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 23:59:37,610 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 23:59:37,612 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 23:59:37,612 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 23:59:37,613 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 23:59:37,613 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 23:59:37,613 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 23:59:37,613 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 23:59:37,614 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 23:59:37,614 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 23:59:37,615 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 23:59:37,615 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 23:59:37,615 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 23:59:37,616 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 23:59:37,616 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 23:59:37,616 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 23:59:37,616 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 23:59:37,617 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 23:59:37,617 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 23:59:37,617 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 23:59:37,617 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 23:59:37,618 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 23:59:37,618 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 23:59:37,618 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 23:59:37,618 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 23:59:37,618 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 23:59:37,619 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 23:59:37,619 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 23:59:37,619 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 23:59:37,619 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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; [2020-10-14 23:59:37,914 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 23:59:37,926 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 23:59:37,930 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 23:59:37,932 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 23:59:37,932 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 23:59:37,933 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/loopv3.c [2020-10-14 23:59:37,992 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/76485be9a/e05744ab730b40a582b9ef1e92fa3253/FLAG6ccbfb96c [2020-10-14 23:59:38,447 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 23:59:38,447 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/loopv3.c [2020-10-14 23:59:38,453 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/76485be9a/e05744ab730b40a582b9ef1e92fa3253/FLAG6ccbfb96c [2020-10-14 23:59:38,840 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/76485be9a/e05744ab730b40a582b9ef1e92fa3253 [2020-10-14 23:59:38,849 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 23:59:38,850 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 23:59:38,856 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 23:59:38,856 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 23:59:38,860 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 23:59:38,861 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:59:38" (1/1) ... [2020-10-14 23:59:38,865 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ecced43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:59:38, skipping insertion in model container [2020-10-14 23:59:38,865 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:59:38" (1/1) ... [2020-10-14 23:59:38,874 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 23:59:38,894 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 23:59:39,134 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 23:59:39,144 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 23:59:39,164 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 23:59:39,181 INFO L208 MainTranslator]: Completed translation [2020-10-14 23:59:39,181 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:59:39 WrapperNode [2020-10-14 23:59:39,181 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 23:59:39,182 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 23:59:39,182 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 23:59:39,183 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 23:59:39,193 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:59:39" (1/1) ... [2020-10-14 23:59:39,193 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:59:39" (1/1) ... [2020-10-14 23:59:39,286 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:59:39" (1/1) ... [2020-10-14 23:59:39,286 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:59:39" (1/1) ... [2020-10-14 23:59:39,291 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:59:39" (1/1) ... [2020-10-14 23:59:39,298 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:59:39" (1/1) ... [2020-10-14 23:59:39,299 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:59:39" (1/1) ... [2020-10-14 23:59:39,306 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 23:59:39,306 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 23:59:39,306 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 23:59:39,307 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 23:59:39,308 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:59:39" (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 23:59:39,370 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 23:59:39,370 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 23:59:39,370 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-14 23:59:39,370 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-14 23:59:39,370 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 23:59:39,371 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-14 23:59:39,371 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 23:59:39,371 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-14 23:59:39,371 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-14 23:59:39,371 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-14 23:59:39,371 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 23:59:39,371 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 23:59:39,372 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 23:59:39,555 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 23:59:39,556 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-14 23:59:39,560 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:59:39 BoogieIcfgContainer [2020-10-14 23:59:39,560 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 23:59:39,561 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 23:59:39,561 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 23:59:39,565 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 23:59:39,565 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:59:38" (1/3) ... [2020-10-14 23:59:39,566 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d00b5bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:59:39, skipping insertion in model container [2020-10-14 23:59:39,566 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:59:39" (2/3) ... [2020-10-14 23:59:39,567 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d00b5bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:59:39, skipping insertion in model container [2020-10-14 23:59:39,567 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:59:39" (3/3) ... [2020-10-14 23:59:39,569 INFO L109 eAbstractionObserver]: Analyzing ICFG loopv3.c [2020-10-14 23:59:39,579 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 23:59:39,587 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 23:59:39,602 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 23:59:39,628 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 23:59:39,628 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 23:59:39,628 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 23:59:39,628 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 23:59:39,628 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 23:59:39,628 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 23:59:39,629 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 23:59:39,629 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 23:59:39,645 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-10-14 23:59:39,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-14 23:59:39,650 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:39,651 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:39,651 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:39,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:39,657 INFO L82 PathProgramCache]: Analyzing trace with hash -821766980, now seen corresponding path program 1 times [2020-10-14 23:59:39,663 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:39,664 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1007546035] [2020-10-14 23:59:39,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:39,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:39,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:39,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:40,112 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:40,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-14 23:59:40,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:59:40,113 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 337 [2020-10-14 23:59:40,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:40,119 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:40,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 23:59:40,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 23:59:40,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 23:59:40,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-14 23:59:40,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:40,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:40,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:40,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:40,220 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:59:40,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:40,221 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-14 23:59:40,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:40,225 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:40,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 23:59:40,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:40,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 23:59:40,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:59:40,236 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 23:59:40,238 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1007546035] [2020-10-14 23:59:40,241 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 23:59:40,241 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 23:59:40,243 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593867557] [2020-10-14 23:59:40,249 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 23:59:40,250 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:40,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 23:59:40,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 23:59:40,282 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 5 states. [2020-10-14 23:59:40,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:40,488 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2020-10-14 23:59:40,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 23:59:40,491 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-10-14 23:59:40,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:40,501 INFO L225 Difference]: With dead ends: 36 [2020-10-14 23:59:40,501 INFO L226 Difference]: Without dead ends: 16 [2020-10-14 23:59:40,505 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-14 23:59:40,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-14 23:59:40,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2020-10-14 23:59:40,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-14 23:59:40,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-10-14 23:59:40,541 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2020-10-14 23:59:40,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:40,542 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-10-14 23:59:40,542 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 23:59:40,542 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-10-14 23:59:40,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-14 23:59:40,543 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:40,543 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:40,543 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 23:59:40,544 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:40,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:40,544 INFO L82 PathProgramCache]: Analyzing trace with hash 1233133055, now seen corresponding path program 1 times [2020-10-14 23:59:40,544 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:40,545 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1025485113] [2020-10-14 23:59:40,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:40,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:40,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:40,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:40,750 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:40,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-14 23:59:40,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:59:40,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 194 [2020-10-14 23:59:40,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:40,752 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:40,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 23:59:40,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 23:59:40,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 23:59:40,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:59:40,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:40,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:40,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:40,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:40,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:59:40,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:40,804 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 23:59:40,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:40,804 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:40,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 23:59:40,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:40,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 23:59:40,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:59:40,810 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:59:40,811 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1025485113] [2020-10-14 23:59:40,811 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:40,812 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 23:59:40,812 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611409600] [2020-10-14 23:59:40,817 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 23:59:40,817 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:40,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 23:59:40,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-14 23:59:40,818 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 6 states. [2020-10-14 23:59:40,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:40,920 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2020-10-14 23:59:40,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 23:59:40,921 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-10-14 23:59:40,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:40,922 INFO L225 Difference]: With dead ends: 24 [2020-10-14 23:59:40,922 INFO L226 Difference]: Without dead ends: 18 [2020-10-14 23:59:40,924 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-14 23:59:40,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-14 23:59:40,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2020-10-14 23:59:40,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-14 23:59:40,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2020-10-14 23:59:40,930 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 14 [2020-10-14 23:59:40,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:40,941 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2020-10-14 23:59:40,942 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 23:59:40,942 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2020-10-14 23:59:40,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-14 23:59:40,943 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:40,943 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:40,943 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 23:59:40,943 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:40,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:40,944 INFO L82 PathProgramCache]: Analyzing trace with hash 307110530, now seen corresponding path program 2 times [2020-10-14 23:59:40,944 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:40,945 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [746800595] [2020-10-14 23:59:40,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:40,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:40,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:40,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:41,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:41,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-14 23:59:41,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:59:41,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 155 [2020-10-14 23:59:41,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:41,112 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:41,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 23:59:41,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 23:59:41,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 23:59:41,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:59:41,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:41,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:41,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:41,183 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:41,183 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:59:41,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:41,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-14 23:59:41,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:41,185 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:41,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 23:59:41,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:41,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 23:59:41,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:59:41,193 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:59:41,193 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [746800595] [2020-10-14 23:59:41,194 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:41,194 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 23:59:41,194 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164549495] [2020-10-14 23:59:41,195 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 23:59:41,195 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:41,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 23:59:41,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-14 23:59:41,196 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 7 states. [2020-10-14 23:59:41,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:41,327 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2020-10-14 23:59:41,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 23:59:41,328 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2020-10-14 23:59:41,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:41,329 INFO L225 Difference]: With dead ends: 26 [2020-10-14 23:59:41,329 INFO L226 Difference]: Without dead ends: 20 [2020-10-14 23:59:41,330 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2020-10-14 23:59:41,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-14 23:59:41,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2020-10-14 23:59:41,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-14 23:59:41,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2020-10-14 23:59:41,336 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 16 [2020-10-14 23:59:41,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:41,337 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2020-10-14 23:59:41,337 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 23:59:41,337 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2020-10-14 23:59:41,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-14 23:59:41,338 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:41,338 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:41,338 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 23:59:41,338 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:41,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:41,339 INFO L82 PathProgramCache]: Analyzing trace with hash -542305723, now seen corresponding path program 3 times [2020-10-14 23:59:41,339 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:41,340 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [178717976] [2020-10-14 23:59:41,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:41,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:41,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:41,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:41,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:41,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-14 23:59:41,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:59:41,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 156 [2020-10-14 23:59:41,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:41,506 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:41,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 23:59:41,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 23:59:41,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-14 23:59:41,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:59:41,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:41,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:41,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:41,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:41,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:59:41,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:41,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:59:41,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:41,566 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:41,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 23:59:41,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:41,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 23:59:41,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:59:41,570 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:59:41,570 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [178717976] [2020-10-14 23:59:41,570 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:41,571 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 23:59:41,571 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255409588] [2020-10-14 23:59:41,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 23:59:41,572 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:41,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 23:59:41,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-14 23:59:41,573 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand 8 states. [2020-10-14 23:59:41,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:41,717 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2020-10-14 23:59:41,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 23:59:41,718 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2020-10-14 23:59:41,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:41,719 INFO L225 Difference]: With dead ends: 28 [2020-10-14 23:59:41,719 INFO L226 Difference]: Without dead ends: 22 [2020-10-14 23:59:41,720 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-10-14 23:59:41,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-14 23:59:41,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-10-14 23:59:41,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-14 23:59:41,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-10-14 23:59:41,727 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 18 [2020-10-14 23:59:41,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:41,727 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-10-14 23:59:41,727 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 23:59:41,727 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-10-14 23:59:41,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-14 23:59:41,728 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:41,729 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:41,729 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 23:59:41,729 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:41,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:41,730 INFO L82 PathProgramCache]: Analyzing trace with hash -787538616, now seen corresponding path program 4 times [2020-10-14 23:59:41,730 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:41,730 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1827295970] [2020-10-14 23:59:41,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:41,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:41,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:41,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:41,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:41,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-14 23:59:41,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:59:41,941 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 200 [2020-10-14 23:59:41,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:41,941 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:41,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 23:59:41,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 23:59:41,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 23:59:41,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:59:42,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:42,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:42,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:42,015 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:42,015 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:59:42,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:42,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 23:59:42,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:42,016 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:42,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 23:59:42,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:42,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 23:59:42,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:59:42,020 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:59:42,021 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1827295970] [2020-10-14 23:59:42,021 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:42,021 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 23:59:42,022 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165323854] [2020-10-14 23:59:42,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 23:59:42,022 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:42,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 23:59:42,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-10-14 23:59:42,023 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 9 states. [2020-10-14 23:59:42,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:42,194 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2020-10-14 23:59:42,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 23:59:42,195 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2020-10-14 23:59:42,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:42,196 INFO L225 Difference]: With dead ends: 30 [2020-10-14 23:59:42,196 INFO L226 Difference]: Without dead ends: 24 [2020-10-14 23:59:42,197 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2020-10-14 23:59:42,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-14 23:59:42,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-10-14 23:59:42,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-14 23:59:42,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2020-10-14 23:59:42,202 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 20 [2020-10-14 23:59:42,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:42,203 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2020-10-14 23:59:42,203 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 23:59:42,203 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2020-10-14 23:59:42,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-14 23:59:42,204 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:42,204 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:42,204 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 23:59:42,205 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:42,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:42,205 INFO L82 PathProgramCache]: Analyzing trace with hash -233147509, now seen corresponding path program 5 times [2020-10-14 23:59:42,205 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:42,206 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [378700717] [2020-10-14 23:59:42,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:42,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:42,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:42,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:42,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:42,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-14 23:59:42,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:59:42,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 228 [2020-10-14 23:59:42,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:42,443 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:42,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 23:59:42,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 23:59:42,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 23:59:42,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:59:42,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:42,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:42,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:42,521 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:42,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:59:42,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:42,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 23:59:42,522 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:42,523 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:42,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 23:59:42,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:42,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 23:59:42,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:59:42,527 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:59:42,528 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [378700717] [2020-10-14 23:59:42,538 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:42,538 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 23:59:42,539 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203224166] [2020-10-14 23:59:42,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 23:59:42,539 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:42,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 23:59:42,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-10-14 23:59:42,540 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand 10 states. [2020-10-14 23:59:42,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:42,728 INFO L93 Difference]: Finished difference Result 32 states and 39 transitions. [2020-10-14 23:59:42,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 23:59:42,729 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2020-10-14 23:59:42,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:42,730 INFO L225 Difference]: With dead ends: 32 [2020-10-14 23:59:42,730 INFO L226 Difference]: Without dead ends: 26 [2020-10-14 23:59:42,730 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=102, Invalid=170, Unknown=0, NotChecked=0, Total=272 [2020-10-14 23:59:42,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-14 23:59:42,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2020-10-14 23:59:42,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-14 23:59:42,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2020-10-14 23:59:42,736 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 22 [2020-10-14 23:59:42,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:42,736 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2020-10-14 23:59:42,736 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 23:59:42,736 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2020-10-14 23:59:42,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-14 23:59:42,737 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:42,737 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:42,737 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 23:59:42,738 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:42,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:42,738 INFO L82 PathProgramCache]: Analyzing trace with hash -39238386, now seen corresponding path program 6 times [2020-10-14 23:59:42,738 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:42,739 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1814684444] [2020-10-14 23:59:42,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:42,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:42,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:42,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:42,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:42,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-14 23:59:42,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:59:42,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 153 [2020-10-14 23:59:42,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:42,901 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:42,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 23:59:42,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 23:59:42,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 23:59:42,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:59:42,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:42,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:42,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:42,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:42,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:59:42,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:42,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:59:42,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:42,984 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:42,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 23:59:42,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:42,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 23:59:42,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:59:42,988 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:59:42,988 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1814684444] [2020-10-14 23:59:42,988 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:42,989 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 23:59:42,989 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938736097] [2020-10-14 23:59:42,989 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 23:59:42,990 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:42,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 23:59:42,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-14 23:59:42,990 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand 11 states. [2020-10-14 23:59:43,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:43,211 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2020-10-14 23:59:43,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 23:59:43,212 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 24 [2020-10-14 23:59:43,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:43,212 INFO L225 Difference]: With dead ends: 34 [2020-10-14 23:59:43,213 INFO L226 Difference]: Without dead ends: 28 [2020-10-14 23:59:43,213 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=128, Invalid=214, Unknown=0, NotChecked=0, Total=342 [2020-10-14 23:59:43,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-14 23:59:43,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-10-14 23:59:43,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-14 23:59:43,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2020-10-14 23:59:43,219 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 24 [2020-10-14 23:59:43,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:43,219 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2020-10-14 23:59:43,219 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 23:59:43,220 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2020-10-14 23:59:43,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-14 23:59:43,220 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:43,221 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:43,221 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 23:59:43,221 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:43,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:43,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1623835089, now seen corresponding path program 7 times [2020-10-14 23:59:43,222 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:43,222 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1000626238] [2020-10-14 23:59:43,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:43,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:43,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:43,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:43,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:43,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-14 23:59:43,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:59:43,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 249 [2020-10-14 23:59:43,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:43,480 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:43,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 23:59:43,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 23:59:43,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-14 23:59:43,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:59:43,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:43,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:43,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:43,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:43,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:59:43,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:43,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:59:43,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:43,571 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:43,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 23:59:43,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:43,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 23:59:43,572 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:59:43,575 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:59:43,576 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1000626238] [2020-10-14 23:59:43,576 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:43,576 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 23:59:43,577 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228125878] [2020-10-14 23:59:43,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 23:59:43,577 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:43,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 23:59:43,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-10-14 23:59:43,578 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand 12 states. [2020-10-14 23:59:43,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:43,797 INFO L93 Difference]: Finished difference Result 36 states and 45 transitions. [2020-10-14 23:59:43,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 23:59:43,798 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 26 [2020-10-14 23:59:43,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:43,799 INFO L225 Difference]: With dead ends: 36 [2020-10-14 23:59:43,799 INFO L226 Difference]: Without dead ends: 30 [2020-10-14 23:59:43,800 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=157, Invalid=263, Unknown=0, NotChecked=0, Total=420 [2020-10-14 23:59:43,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-14 23:59:43,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-10-14 23:59:43,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-14 23:59:43,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 37 transitions. [2020-10-14 23:59:43,805 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 37 transitions. Word has length 26 [2020-10-14 23:59:43,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:43,805 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 37 transitions. [2020-10-14 23:59:43,805 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 23:59:43,805 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 37 transitions. [2020-10-14 23:59:43,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-14 23:59:43,806 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:43,806 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:43,806 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 23:59:43,807 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:43,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:43,807 INFO L82 PathProgramCache]: Analyzing trace with hash 2109610452, now seen corresponding path program 8 times [2020-10-14 23:59:43,807 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:43,808 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [910213406] [2020-10-14 23:59:43,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:43,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:43,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:43,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:44,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:44,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-14 23:59:44,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:59:44,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 256 [2020-10-14 23:59:44,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:44,073 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:44,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 23:59:44,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 23:59:44,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-14 23:59:44,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:59:44,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:44,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:44,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:44,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:44,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:59:44,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:44,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:59:44,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:44,215 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:44,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 23:59:44,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:44,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 23:59:44,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:59:44,220 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:59:44,224 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [910213406] [2020-10-14 23:59:44,225 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:44,226 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 23:59:44,226 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117647836] [2020-10-14 23:59:44,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 23:59:44,226 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:44,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 23:59:44,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-10-14 23:59:44,227 INFO L87 Difference]: Start difference. First operand 29 states and 37 transitions. Second operand 13 states. [2020-10-14 23:59:44,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:44,509 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2020-10-14 23:59:44,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 23:59:44,510 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 28 [2020-10-14 23:59:44,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:44,511 INFO L225 Difference]: With dead ends: 38 [2020-10-14 23:59:44,511 INFO L226 Difference]: Without dead ends: 32 [2020-10-14 23:59:44,512 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=189, Invalid=317, Unknown=0, NotChecked=0, Total=506 [2020-10-14 23:59:44,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-14 23:59:44,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2020-10-14 23:59:44,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-14 23:59:44,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 40 transitions. [2020-10-14 23:59:44,517 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 40 transitions. Word has length 28 [2020-10-14 23:59:44,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:44,518 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 40 transitions. [2020-10-14 23:59:44,518 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 23:59:44,518 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 40 transitions. [2020-10-14 23:59:44,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-14 23:59:44,519 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:44,519 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:44,519 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 23:59:44,519 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:44,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:44,520 INFO L82 PathProgramCache]: Analyzing trace with hash 788299031, now seen corresponding path program 9 times [2020-10-14 23:59:44,520 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:44,520 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [539470869] [2020-10-14 23:59:44,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:44,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:44,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:44,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:44,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:44,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-14 23:59:44,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:59:44,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 364 [2020-10-14 23:59:44,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:44,896 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:44,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 23:59:44,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 23:59:44,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-14 23:59:44,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:45,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:45,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:45,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:45,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:45,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:59:45,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:45,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:59:45,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:45,014 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:45,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 23:59:45,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:45,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 23:59:45,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:59:45,018 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:59:45,019 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [539470869] [2020-10-14 23:59:45,019 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:45,019 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 23:59:45,019 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34699814] [2020-10-14 23:59:45,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 23:59:45,020 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:45,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 23:59:45,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-10-14 23:59:45,021 INFO L87 Difference]: Start difference. First operand 31 states and 40 transitions. Second operand 14 states. [2020-10-14 23:59:45,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:45,319 INFO L93 Difference]: Finished difference Result 40 states and 51 transitions. [2020-10-14 23:59:45,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 23:59:45,320 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 30 [2020-10-14 23:59:45,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:45,320 INFO L225 Difference]: With dead ends: 40 [2020-10-14 23:59:45,321 INFO L226 Difference]: Without dead ends: 34 [2020-10-14 23:59:45,321 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=224, Invalid=376, Unknown=0, NotChecked=0, Total=600 [2020-10-14 23:59:45,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-14 23:59:45,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-10-14 23:59:45,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-14 23:59:45,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2020-10-14 23:59:45,328 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 30 [2020-10-14 23:59:45,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:45,328 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2020-10-14 23:59:45,328 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 23:59:45,328 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2020-10-14 23:59:45,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-14 23:59:45,329 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:45,330 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:45,330 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 23:59:45,330 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:45,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:45,331 INFO L82 PathProgramCache]: Analyzing trace with hash -1976624230, now seen corresponding path program 10 times [2020-10-14 23:59:45,331 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:45,332 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [702323474] [2020-10-14 23:59:45,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:45,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:45,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:45,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:45,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:45,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-14 23:59:45,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:59:45,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 409 [2020-10-14 23:59:45,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:45,754 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:45,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 23:59:45,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 23:59:45,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-14 23:59:45,755 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:45,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:45,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:45,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:45,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:45,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:59:45,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:45,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:59:45,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:45,885 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:45,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 23:59:45,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:45,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 23:59:45,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:59:45,890 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:59:45,890 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [702323474] [2020-10-14 23:59:45,890 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:45,890 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 23:59:45,891 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050147758] [2020-10-14 23:59:45,891 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 23:59:45,891 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:45,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 23:59:45,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2020-10-14 23:59:45,892 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand 15 states. [2020-10-14 23:59:46,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:46,225 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2020-10-14 23:59:46,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 23:59:46,226 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 32 [2020-10-14 23:59:46,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:46,227 INFO L225 Difference]: With dead ends: 42 [2020-10-14 23:59:46,227 INFO L226 Difference]: Without dead ends: 36 [2020-10-14 23:59:46,228 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=262, Invalid=440, Unknown=0, NotChecked=0, Total=702 [2020-10-14 23:59:46,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-14 23:59:46,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-10-14 23:59:46,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-14 23:59:46,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 46 transitions. [2020-10-14 23:59:46,233 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 46 transitions. Word has length 32 [2020-10-14 23:59:46,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:46,233 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 46 transitions. [2020-10-14 23:59:46,233 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 23:59:46,234 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 46 transitions. [2020-10-14 23:59:46,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-14 23:59:46,234 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:46,234 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:46,235 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 23:59:46,235 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:46,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:46,235 INFO L82 PathProgramCache]: Analyzing trace with hash -483121827, now seen corresponding path program 11 times [2020-10-14 23:59:46,236 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:46,236 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [650350180] [2020-10-14 23:59:46,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:46,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:46,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:46,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:46,680 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:46,680 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-14 23:59:46,680 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:59:46,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 434 [2020-10-14 23:59:46,681 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:46,681 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:46,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 23:59:46,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 23:59:46,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-14 23:59:46,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:59:46,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:46,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:46,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:46,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:46,849 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:59:46,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:46,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:59:46,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:46,850 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:46,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 23:59:46,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:46,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 23:59:46,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:59:46,855 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:59:46,855 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [650350180] [2020-10-14 23:59:46,856 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:46,856 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 23:59:46,856 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18813889] [2020-10-14 23:59:46,856 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 23:59:46,857 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:46,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 23:59:46,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2020-10-14 23:59:46,858 INFO L87 Difference]: Start difference. First operand 35 states and 46 transitions. Second operand 16 states. [2020-10-14 23:59:47,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:47,233 INFO L93 Difference]: Finished difference Result 44 states and 57 transitions. [2020-10-14 23:59:47,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-14 23:59:47,234 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 34 [2020-10-14 23:59:47,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:47,235 INFO L225 Difference]: With dead ends: 44 [2020-10-14 23:59:47,235 INFO L226 Difference]: Without dead ends: 38 [2020-10-14 23:59:47,237 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=303, Invalid=509, Unknown=0, NotChecked=0, Total=812 [2020-10-14 23:59:47,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-14 23:59:47,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-10-14 23:59:47,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-14 23:59:47,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 49 transitions. [2020-10-14 23:59:47,243 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 49 transitions. Word has length 34 [2020-10-14 23:59:47,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:47,243 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 49 transitions. [2020-10-14 23:59:47,243 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 23:59:47,243 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 49 transitions. [2020-10-14 23:59:47,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-14 23:59:47,244 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:47,244 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:47,245 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 23:59:47,245 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:47,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:47,245 INFO L82 PathProgramCache]: Analyzing trace with hash 253610592, now seen corresponding path program 12 times [2020-10-14 23:59:47,245 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:47,246 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1924970684] [2020-10-14 23:59:47,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:47,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:47,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:47,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:47,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:47,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-14 23:59:47,614 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:59:47,614 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 355 [2020-10-14 23:59:47,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:47,615 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:47,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 23:59:47,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 23:59:47,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-14 23:59:47,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:59:47,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:47,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:47,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:47,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:47,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:59:47,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:47,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:59:47,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:47,781 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:47,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 23:59:47,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:47,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 23:59:47,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:59:47,786 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:59:47,786 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1924970684] [2020-10-14 23:59:47,786 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:47,786 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 23:59:47,787 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040588214] [2020-10-14 23:59:47,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 23:59:47,788 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:47,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 23:59:47,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2020-10-14 23:59:47,788 INFO L87 Difference]: Start difference. First operand 37 states and 49 transitions. Second operand 17 states. [2020-10-14 23:59:48,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:48,182 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2020-10-14 23:59:48,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 23:59:48,183 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 36 [2020-10-14 23:59:48,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:48,184 INFO L225 Difference]: With dead ends: 46 [2020-10-14 23:59:48,184 INFO L226 Difference]: Without dead ends: 40 [2020-10-14 23:59:48,185 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=347, Invalid=583, Unknown=0, NotChecked=0, Total=930 [2020-10-14 23:59:48,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-14 23:59:48,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-10-14 23:59:48,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-14 23:59:48,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 52 transitions. [2020-10-14 23:59:48,190 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 52 transitions. Word has length 36 [2020-10-14 23:59:48,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:48,190 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 52 transitions. [2020-10-14 23:59:48,190 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 23:59:48,191 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 52 transitions. [2020-10-14 23:59:48,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-14 23:59:48,192 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:48,192 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:48,192 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 23:59:48,192 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:48,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:48,193 INFO L82 PathProgramCache]: Analyzing trace with hash -416138589, now seen corresponding path program 13 times [2020-10-14 23:59:48,193 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:48,193 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [833904668] [2020-10-14 23:59:48,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:48,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:48,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:48,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:48,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:48,538 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-14 23:59:48,538 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:59:48,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 333 [2020-10-14 23:59:48,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:48,539 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:48,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 23:59:48,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 23:59:48,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-14 23:59:48,539 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:48,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:48,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:48,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:48,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:48,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:59:48,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:48,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 23:59:48,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:48,731 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:48,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 23:59:48,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:48,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 23:59:48,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:59:48,737 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:59:48,738 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [833904668] [2020-10-14 23:59:48,738 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:48,738 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 23:59:48,738 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884093792] [2020-10-14 23:59:48,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 23:59:48,739 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:48,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 23:59:48,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2020-10-14 23:59:48,741 INFO L87 Difference]: Start difference. First operand 39 states and 52 transitions. Second operand 18 states. [2020-10-14 23:59:49,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:49,178 INFO L93 Difference]: Finished difference Result 48 states and 63 transitions. [2020-10-14 23:59:49,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 23:59:49,178 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 38 [2020-10-14 23:59:49,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:49,179 INFO L225 Difference]: With dead ends: 48 [2020-10-14 23:59:49,180 INFO L226 Difference]: Without dead ends: 42 [2020-10-14 23:59:49,181 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=394, Invalid=662, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 23:59:49,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-14 23:59:49,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-10-14 23:59:49,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-14 23:59:49,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 55 transitions. [2020-10-14 23:59:49,186 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 55 transitions. Word has length 38 [2020-10-14 23:59:49,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:49,186 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 55 transitions. [2020-10-14 23:59:49,186 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 23:59:49,186 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 55 transitions. [2020-10-14 23:59:49,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-14 23:59:49,187 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:49,187 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:49,188 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 23:59:49,188 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:49,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:49,188 INFO L82 PathProgramCache]: Analyzing trace with hash 199992870, now seen corresponding path program 14 times [2020-10-14 23:59:49,188 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:49,189 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1205899093] [2020-10-14 23:59:49,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:49,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:49,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:49,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:49,769 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:49,769 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-14 23:59:49,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:59:49,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 570 [2020-10-14 23:59:49,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:49,770 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:49,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 23:59:49,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 23:59:49,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-14 23:59:49,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:49,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:49,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:49,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:49,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:49,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:59:49,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:49,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:59:49,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:49,967 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:49,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 23:59:49,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:49,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 23:59:49,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:49,973 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:59:49,973 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1205899093] [2020-10-14 23:59:49,973 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:49,974 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 23:59:49,974 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004191994] [2020-10-14 23:59:49,974 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-14 23:59:49,975 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:49,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-14 23:59:49,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2020-10-14 23:59:49,975 INFO L87 Difference]: Start difference. First operand 41 states and 55 transitions. Second operand 19 states. [2020-10-14 23:59:50,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:50,427 INFO L93 Difference]: Finished difference Result 50 states and 66 transitions. [2020-10-14 23:59:50,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-14 23:59:50,428 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 40 [2020-10-14 23:59:50,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:50,429 INFO L225 Difference]: With dead ends: 50 [2020-10-14 23:59:50,429 INFO L226 Difference]: Without dead ends: 44 [2020-10-14 23:59:50,430 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=444, Invalid=746, Unknown=0, NotChecked=0, Total=1190 [2020-10-14 23:59:50,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-14 23:59:50,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-10-14 23:59:50,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-14 23:59:50,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 58 transitions. [2020-10-14 23:59:50,438 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 58 transitions. Word has length 40 [2020-10-14 23:59:50,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:50,440 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 58 transitions. [2020-10-14 23:59:50,440 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-14 23:59:50,440 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 58 transitions. [2020-10-14 23:59:50,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-14 23:59:50,441 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:50,441 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:50,441 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 23:59:50,442 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:50,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:50,442 INFO L82 PathProgramCache]: Analyzing trace with hash -403161879, now seen corresponding path program 15 times [2020-10-14 23:59:50,442 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:50,443 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [3857457] [2020-10-14 23:59:50,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:50,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:50,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:50,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:50,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:50,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-14 23:59:50,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:59:50,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 361 [2020-10-14 23:59:50,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:50,819 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:50,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 23:59:50,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 23:59:50,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-14 23:59:50,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:59:51,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:51,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:51,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:51,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:51,050 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:59:51,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:51,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:59:51,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:51,053 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:51,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 23:59:51,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:51,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 23:59:51,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:59:51,058 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:59:51,059 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [3857457] [2020-10-14 23:59:51,061 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:51,061 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-14 23:59:51,062 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129220660] [2020-10-14 23:59:51,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-14 23:59:51,063 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:51,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-14 23:59:51,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=223, Unknown=0, NotChecked=0, Total=380 [2020-10-14 23:59:51,064 INFO L87 Difference]: Start difference. First operand 43 states and 58 transitions. Second operand 20 states. [2020-10-14 23:59:51,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:51,565 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2020-10-14 23:59:51,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-14 23:59:51,565 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 42 [2020-10-14 23:59:51,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:51,566 INFO L225 Difference]: With dead ends: 52 [2020-10-14 23:59:51,566 INFO L226 Difference]: Without dead ends: 46 [2020-10-14 23:59:51,567 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=497, Invalid=835, Unknown=0, NotChecked=0, Total=1332 [2020-10-14 23:59:51,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-14 23:59:51,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-10-14 23:59:51,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-14 23:59:51,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 61 transitions. [2020-10-14 23:59:51,572 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 61 transitions. Word has length 42 [2020-10-14 23:59:51,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:51,573 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 61 transitions. [2020-10-14 23:59:51,573 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-14 23:59:51,573 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 61 transitions. [2020-10-14 23:59:51,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-14 23:59:51,573 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:51,573 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:51,574 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 23:59:51,574 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:51,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:51,574 INFO L82 PathProgramCache]: Analyzing trace with hash -214290708, now seen corresponding path program 16 times [2020-10-14 23:59:51,574 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:51,575 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [491461648] [2020-10-14 23:59:51,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:51,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:51,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:51,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:52,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:52,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-14 23:59:52,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:59:52,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 681 [2020-10-14 23:59:52,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:52,268 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:52,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-14 23:59:52,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 23:59:52,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-14 23:59:52,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:52,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:52,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:52,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:52,510 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:52,510 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:59:52,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:52,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:59:52,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:52,511 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:52,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 23:59:52,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:52,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 23:59:52,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:52,516 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:59:52,517 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [491461648] [2020-10-14 23:59:52,517 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:52,517 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-14 23:59:52,517 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626536648] [2020-10-14 23:59:52,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-14 23:59:52,518 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:52,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-14 23:59:52,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=245, Unknown=0, NotChecked=0, Total=420 [2020-10-14 23:59:52,519 INFO L87 Difference]: Start difference. First operand 45 states and 61 transitions. Second operand 21 states. [2020-10-14 23:59:53,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:53,038 INFO L93 Difference]: Finished difference Result 54 states and 72 transitions. [2020-10-14 23:59:53,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 23:59:53,039 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 44 [2020-10-14 23:59:53,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:53,039 INFO L225 Difference]: With dead ends: 54 [2020-10-14 23:59:53,040 INFO L226 Difference]: Without dead ends: 48 [2020-10-14 23:59:53,041 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=553, Invalid=929, Unknown=0, NotChecked=0, Total=1482 [2020-10-14 23:59:53,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-14 23:59:53,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2020-10-14 23:59:53,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-14 23:59:53,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 64 transitions. [2020-10-14 23:59:53,053 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 64 transitions. Word has length 44 [2020-10-14 23:59:53,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:53,054 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 64 transitions. [2020-10-14 23:59:53,054 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-14 23:59:53,054 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 64 transitions. [2020-10-14 23:59:53,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-14 23:59:53,055 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:53,055 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:53,055 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 23:59:53,055 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:53,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:53,056 INFO L82 PathProgramCache]: Analyzing trace with hash 902278191, now seen corresponding path program 17 times [2020-10-14 23:59:53,056 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:53,056 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [197443836] [2020-10-14 23:59:53,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:53,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:53,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:53,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:53,729 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:53,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-14 23:59:53,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:59:53,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 662 [2020-10-14 23:59:53,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:53,730 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:53,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 23:59:53,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 23:59:53,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-14 23:59:53,731 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:54,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:54,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:54,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:54,011 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:54,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:59:54,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:54,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:59:54,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:54,012 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:54,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 23:59:54,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:54,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 23:59:54,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:59:54,022 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:59:54,023 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [197443836] [2020-10-14 23:59:54,023 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:54,023 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-14 23:59:54,027 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639393653] [2020-10-14 23:59:54,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-14 23:59:54,029 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:54,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-14 23:59:54,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=268, Unknown=0, NotChecked=0, Total=462 [2020-10-14 23:59:54,030 INFO L87 Difference]: Start difference. First operand 47 states and 64 transitions. Second operand 22 states. [2020-10-14 23:59:54,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:54,654 INFO L93 Difference]: Finished difference Result 56 states and 75 transitions. [2020-10-14 23:59:54,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-14 23:59:54,655 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 46 [2020-10-14 23:59:54,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:54,656 INFO L225 Difference]: With dead ends: 56 [2020-10-14 23:59:54,656 INFO L226 Difference]: Without dead ends: 50 [2020-10-14 23:59:54,657 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=612, Invalid=1028, Unknown=0, NotChecked=0, Total=1640 [2020-10-14 23:59:54,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-14 23:59:54,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2020-10-14 23:59:54,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-14 23:59:54,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 67 transitions. [2020-10-14 23:59:54,665 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 67 transitions. Word has length 46 [2020-10-14 23:59:54,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:54,666 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 67 transitions. [2020-10-14 23:59:54,666 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-14 23:59:54,666 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 67 transitions. [2020-10-14 23:59:54,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-14 23:59:54,666 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:54,667 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:54,667 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-14 23:59:54,667 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:54,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:54,667 INFO L82 PathProgramCache]: Analyzing trace with hash 183166130, now seen corresponding path program 18 times [2020-10-14 23:59:54,667 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:54,668 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [188702956] [2020-10-14 23:59:54,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:54,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:54,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:54,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:55,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:55,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-14 23:59:55,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:59:55,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 931 [2020-10-14 23:59:55,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:55,610 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:55,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-14 23:59:55,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 23:59:55,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-14 23:59:55,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:55,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:55,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:55,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:55,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:55,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:59:55,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:55,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:59:55,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:55,893 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:55,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 23:59:55,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:55,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 23:59:55,894 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:55,899 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:59:55,899 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [188702956] [2020-10-14 23:59:55,899 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:55,899 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-14 23:59:55,900 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359714461] [2020-10-14 23:59:55,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-14 23:59:55,902 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:55,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-14 23:59:55,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=292, Unknown=0, NotChecked=0, Total=506 [2020-10-14 23:59:55,903 INFO L87 Difference]: Start difference. First operand 49 states and 67 transitions. Second operand 23 states. [2020-10-14 23:59:56,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:56,588 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2020-10-14 23:59:56,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-14 23:59:56,588 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 48 [2020-10-14 23:59:56,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:56,589 INFO L225 Difference]: With dead ends: 58 [2020-10-14 23:59:56,589 INFO L226 Difference]: Without dead ends: 52 [2020-10-14 23:59:56,590 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=674, Invalid=1132, Unknown=0, NotChecked=0, Total=1806 [2020-10-14 23:59:56,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-14 23:59:56,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-10-14 23:59:56,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-14 23:59:56,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 70 transitions. [2020-10-14 23:59:56,595 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 70 transitions. Word has length 48 [2020-10-14 23:59:56,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:56,595 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 70 transitions. [2020-10-14 23:59:56,595 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-14 23:59:56,595 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 70 transitions. [2020-10-14 23:59:56,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-14 23:59:56,596 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:56,596 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:56,596 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-14 23:59:56,597 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:56,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:56,597 INFO L82 PathProgramCache]: Analyzing trace with hash 606210165, now seen corresponding path program 19 times [2020-10-14 23:59:56,597 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:56,597 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1509053120] [2020-10-14 23:59:56,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:56,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:56,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:56,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:56,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:56,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-14 23:59:56,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:59:56,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 340 [2020-10-14 23:59:56,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:56,949 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:56,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-14 23:59:56,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 23:59:56,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-14 23:59:56,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:57,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:57,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:57,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:57,260 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:57,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:59:57,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:57,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:59:57,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:57,261 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:57,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 23:59:57,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:57,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 23:59:57,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:57,267 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:59:57,267 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1509053120] [2020-10-14 23:59:57,267 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:57,268 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-14 23:59:57,268 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672887635] [2020-10-14 23:59:57,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-14 23:59:57,268 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:57,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-14 23:59:57,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=317, Unknown=0, NotChecked=0, Total=552 [2020-10-14 23:59:57,269 INFO L87 Difference]: Start difference. First operand 51 states and 70 transitions. Second operand 24 states. [2020-10-14 23:59:57,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:59:57,982 INFO L93 Difference]: Finished difference Result 60 states and 81 transitions. [2020-10-14 23:59:57,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-14 23:59:57,982 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 50 [2020-10-14 23:59:57,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:59:57,983 INFO L225 Difference]: With dead ends: 60 [2020-10-14 23:59:57,984 INFO L226 Difference]: Without dead ends: 54 [2020-10-14 23:59:57,985 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=739, Invalid=1241, Unknown=0, NotChecked=0, Total=1980 [2020-10-14 23:59:57,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-14 23:59:57,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2020-10-14 23:59:57,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-14 23:59:57,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 73 transitions. [2020-10-14 23:59:57,991 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 73 transitions. Word has length 50 [2020-10-14 23:59:57,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:59:57,991 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 73 transitions. [2020-10-14 23:59:57,991 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-14 23:59:57,991 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 73 transitions. [2020-10-14 23:59:57,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-14 23:59:57,992 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:59:57,992 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:59:57,992 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-14 23:59:57,992 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:59:57,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:59:57,993 INFO L82 PathProgramCache]: Analyzing trace with hash -870365320, now seen corresponding path program 20 times [2020-10-14 23:59:57,993 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:59:57,993 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [879182334] [2020-10-14 23:59:57,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:59:58,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:58,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:58,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:58,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:58,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-14 23:59:58,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:59:58,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 979 [2020-10-14 23:59:58,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:58,984 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:58,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-14 23:59:58,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 23:59:58,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-14 23:59:58,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:59:59,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:59,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:59,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:59,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:59,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:59:59,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:59,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:59:59,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:59,474 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:59,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 23:59:59,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:59,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 23:59:59,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:59:59,485 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:59:59,485 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [879182334] [2020-10-14 23:59:59,486 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:59,486 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-14 23:59:59,486 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502889016] [2020-10-14 23:59:59,487 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-14 23:59:59,488 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:59,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-14 23:59:59,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=343, Unknown=0, NotChecked=0, Total=600 [2020-10-14 23:59:59,489 INFO L87 Difference]: Start difference. First operand 53 states and 73 transitions. Second operand 25 states. [2020-10-15 00:00:00,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:00:00,425 INFO L93 Difference]: Finished difference Result 62 states and 84 transitions. [2020-10-15 00:00:00,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-15 00:00:00,426 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 52 [2020-10-15 00:00:00,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:00:00,427 INFO L225 Difference]: With dead ends: 62 [2020-10-15 00:00:00,427 INFO L226 Difference]: Without dead ends: 56 [2020-10-15 00:00:00,429 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=807, Invalid=1355, Unknown=0, NotChecked=0, Total=2162 [2020-10-15 00:00:00,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-15 00:00:00,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2020-10-15 00:00:00,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-15 00:00:00,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 76 transitions. [2020-10-15 00:00:00,438 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 76 transitions. Word has length 52 [2020-10-15 00:00:00,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:00:00,438 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 76 transitions. [2020-10-15 00:00:00,438 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-15 00:00:00,439 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 76 transitions. [2020-10-15 00:00:00,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-15 00:00:00,440 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:00:00,440 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:00:00,440 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-15 00:00:00,440 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:00:00,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:00:00,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1774768571, now seen corresponding path program 21 times [2020-10-15 00:00:00,441 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:00:00,443 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [429594045] [2020-10-15 00:00:00,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:00:00,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:00,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:00,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:01,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:01,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-15 00:00:01,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:00:01,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 684 [2020-10-15 00:00:01,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:01,155 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:01,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-15 00:00:01,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-15 00:00:01,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-15 00:00:01,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:01,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:00:01,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:01,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:01,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:01,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:00:01,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:00:01,509 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-15 00:00:01,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:01,509 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:01,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:00:01,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:00:01,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-15 00:00:01,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:01,514 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:00:01,514 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [429594045] [2020-10-15 00:00:01,514 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:00:01,514 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-15 00:00:01,515 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912405327] [2020-10-15 00:00:01,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-15 00:00:01,515 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:00:01,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-15 00:00:01,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=370, Unknown=0, NotChecked=0, Total=650 [2020-10-15 00:00:01,516 INFO L87 Difference]: Start difference. First operand 55 states and 76 transitions. Second operand 26 states. [2020-10-15 00:00:02,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:00:02,296 INFO L93 Difference]: Finished difference Result 64 states and 87 transitions. [2020-10-15 00:00:02,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 00:00:02,299 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 54 [2020-10-15 00:00:02,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:00:02,300 INFO L225 Difference]: With dead ends: 64 [2020-10-15 00:00:02,300 INFO L226 Difference]: Without dead ends: 58 [2020-10-15 00:00:02,301 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=878, Invalid=1474, Unknown=0, NotChecked=0, Total=2352 [2020-10-15 00:00:02,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-15 00:00:02,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2020-10-15 00:00:02,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-15 00:00:02,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 79 transitions. [2020-10-15 00:00:02,305 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 79 transitions. Word has length 54 [2020-10-15 00:00:02,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:00:02,305 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 79 transitions. [2020-10-15 00:00:02,306 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-15 00:00:02,306 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 79 transitions. [2020-10-15 00:00:02,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-15 00:00:02,306 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:00:02,306 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:00:02,307 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-15 00:00:02,307 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:00:02,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:00:02,307 INFO L82 PathProgramCache]: Analyzing trace with hash 1127798590, now seen corresponding path program 22 times [2020-10-15 00:00:02,307 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:00:02,307 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1704110683] [2020-10-15 00:00:02,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:00:02,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:02,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:02,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:03,395 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:03,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-15 00:00:03,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:00:03,396 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1076 [2020-10-15 00:00:03,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:03,397 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:03,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-15 00:00:03,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-15 00:00:03,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-15 00:00:03,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:00:03,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:00:03,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:03,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:03,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:03,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:00:03,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:00:03,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-15 00:00:03,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:03,972 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:03,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:00:03,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:00:03,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-15 00:00:03,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:00:03,984 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:00:03,984 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1704110683] [2020-10-15 00:00:03,987 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:00:03,987 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-15 00:00:03,989 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053951687] [2020-10-15 00:00:03,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-15 00:00:03,990 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:00:03,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-15 00:00:03,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=398, Unknown=0, NotChecked=0, Total=702 [2020-10-15 00:00:03,991 INFO L87 Difference]: Start difference. First operand 57 states and 79 transitions. Second operand 27 states. [2020-10-15 00:00:04,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:00:04,873 INFO L93 Difference]: Finished difference Result 66 states and 90 transitions. [2020-10-15 00:00:04,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 00:00:04,874 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 56 [2020-10-15 00:00:04,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:00:04,875 INFO L225 Difference]: With dead ends: 66 [2020-10-15 00:00:04,875 INFO L226 Difference]: Without dead ends: 60 [2020-10-15 00:00:04,877 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=952, Invalid=1598, Unknown=0, NotChecked=0, Total=2550 [2020-10-15 00:00:04,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-15 00:00:04,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2020-10-15 00:00:04,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-15 00:00:04,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 82 transitions. [2020-10-15 00:00:04,884 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 82 transitions. Word has length 56 [2020-10-15 00:00:04,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:00:04,885 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 82 transitions. [2020-10-15 00:00:04,885 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-15 00:00:04,885 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 82 transitions. [2020-10-15 00:00:04,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-15 00:00:04,887 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:00:04,887 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:00:04,887 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-15 00:00:04,888 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:00:04,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:00:04,888 INFO L82 PathProgramCache]: Analyzing trace with hash -2135062527, now seen corresponding path program 23 times [2020-10-15 00:00:04,888 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:00:04,888 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [559826121] [2020-10-15 00:00:04,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:00:04,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:04,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:05,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:05,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:05,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-15 00:00:05,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:00:05,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 970 [2020-10-15 00:00:05,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:05,874 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:05,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-15 00:00:05,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-15 00:00:05,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-15 00:00:05,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:00:06,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:00:06,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:06,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:06,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:06,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:00:06,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:00:06,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:00:06,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:06,334 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:06,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:00:06,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:00:06,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-15 00:00:06,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:06,341 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:00:06,341 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [559826121] [2020-10-15 00:00:06,341 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:00:06,341 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-15 00:00:06,342 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358394399] [2020-10-15 00:00:06,342 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-15 00:00:06,342 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:00:06,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-15 00:00:06,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=427, Unknown=0, NotChecked=0, Total=756 [2020-10-15 00:00:06,343 INFO L87 Difference]: Start difference. First operand 59 states and 82 transitions. Second operand 28 states. [2020-10-15 00:00:07,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:00:07,289 INFO L93 Difference]: Finished difference Result 68 states and 93 transitions. [2020-10-15 00:00:07,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 00:00:07,290 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 58 [2020-10-15 00:00:07,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:00:07,291 INFO L225 Difference]: With dead ends: 68 [2020-10-15 00:00:07,291 INFO L226 Difference]: Without dead ends: 62 [2020-10-15 00:00:07,293 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1029, Invalid=1727, Unknown=0, NotChecked=0, Total=2756 [2020-10-15 00:00:07,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-15 00:00:07,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2020-10-15 00:00:07,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-15 00:00:07,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 85 transitions. [2020-10-15 00:00:07,299 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 85 transitions. Word has length 58 [2020-10-15 00:00:07,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:00:07,300 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 85 transitions. [2020-10-15 00:00:07,300 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-15 00:00:07,300 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 85 transitions. [2020-10-15 00:00:07,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-15 00:00:07,301 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:00:07,301 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:00:07,304 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-15 00:00:07,306 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:00:07,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:00:07,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1876497412, now seen corresponding path program 24 times [2020-10-15 00:00:07,307 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:00:07,307 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [271396746] [2020-10-15 00:00:07,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:00:07,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:07,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:07,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:08,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:08,124 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-15 00:00:08,124 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:00:08,124 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 800 [2020-10-15 00:00:08,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:08,125 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:08,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-15 00:00:08,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-15 00:00:08,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-15 00:00:08,125 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:08,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:00:08,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:08,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:08,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:08,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:00:08,602 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:00:08,602 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-15 00:00:08,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:08,603 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:08,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:00:08,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:00:08,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-15 00:00:08,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:08,610 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:00:08,610 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [271396746] [2020-10-15 00:00:08,610 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:00:08,610 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-15 00:00:08,611 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136733372] [2020-10-15 00:00:08,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-15 00:00:08,611 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:00:08,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-15 00:00:08,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=457, Unknown=0, NotChecked=0, Total=812 [2020-10-15 00:00:08,612 INFO L87 Difference]: Start difference. First operand 61 states and 85 transitions. Second operand 29 states. [2020-10-15 00:00:09,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:00:09,507 INFO L93 Difference]: Finished difference Result 70 states and 96 transitions. [2020-10-15 00:00:09,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 00:00:09,508 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 60 [2020-10-15 00:00:09,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:00:09,509 INFO L225 Difference]: With dead ends: 70 [2020-10-15 00:00:09,509 INFO L226 Difference]: Without dead ends: 64 [2020-10-15 00:00:09,511 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1109, Invalid=1861, Unknown=0, NotChecked=0, Total=2970 [2020-10-15 00:00:09,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-15 00:00:09,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2020-10-15 00:00:09,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-15 00:00:09,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 88 transitions. [2020-10-15 00:00:09,515 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 88 transitions. Word has length 60 [2020-10-15 00:00:09,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:00:09,515 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 88 transitions. [2020-10-15 00:00:09,515 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-15 00:00:09,515 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 88 transitions. [2020-10-15 00:00:09,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-15 00:00:09,516 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:00:09,516 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:00:09,516 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-15 00:00:09,516 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:00:09,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:00:09,517 INFO L82 PathProgramCache]: Analyzing trace with hash 104966983, now seen corresponding path program 25 times [2020-10-15 00:00:09,517 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:00:09,517 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1080100073] [2020-10-15 00:00:09,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:00:09,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:09,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:09,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:10,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:10,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-15 00:00:10,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:00:10,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1054 [2020-10-15 00:00:10,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:10,587 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:10,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-15 00:00:10,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-15 00:00:10,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-15 00:00:10,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:00:11,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:00:11,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:11,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:11,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:11,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:00:11,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:00:11,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-15 00:00:11,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:11,138 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:11,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:00:11,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:00:11,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-15 00:00:11,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:11,144 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:00:11,144 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1080100073] [2020-10-15 00:00:11,144 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:00:11,144 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-15 00:00:11,144 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968800974] [2020-10-15 00:00:11,144 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-15 00:00:11,145 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:00:11,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-15 00:00:11,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=488, Unknown=0, NotChecked=0, Total=870 [2020-10-15 00:00:11,145 INFO L87 Difference]: Start difference. First operand 63 states and 88 transitions. Second operand 30 states. [2020-10-15 00:00:12,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:00:12,178 INFO L93 Difference]: Finished difference Result 72 states and 99 transitions. [2020-10-15 00:00:12,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 00:00:12,179 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 62 [2020-10-15 00:00:12,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:00:12,180 INFO L225 Difference]: With dead ends: 72 [2020-10-15 00:00:12,180 INFO L226 Difference]: Without dead ends: 66 [2020-10-15 00:00:12,182 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1192, Invalid=2000, Unknown=0, NotChecked=0, Total=3192 [2020-10-15 00:00:12,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-15 00:00:12,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2020-10-15 00:00:12,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-15 00:00:12,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 91 transitions. [2020-10-15 00:00:12,187 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 91 transitions. Word has length 62 [2020-10-15 00:00:12,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:00:12,187 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 91 transitions. [2020-10-15 00:00:12,187 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-15 00:00:12,187 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 91 transitions. [2020-10-15 00:00:12,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-15 00:00:12,188 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:00:12,188 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:00:12,188 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-15 00:00:12,188 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:00:12,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:00:12,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1528726070, now seen corresponding path program 26 times [2020-10-15 00:00:12,188 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:00:12,189 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2124694624] [2020-10-15 00:00:12,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:00:12,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:12,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:12,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:12,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:12,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-15 00:00:12,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:00:12,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 679 [2020-10-15 00:00:12,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:12,880 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:12,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-15 00:00:12,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-15 00:00:12,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-15 00:00:12,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:13,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:00:13,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:13,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:13,574 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:13,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:00:13,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:00:13,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:00:13,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:13,575 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:13,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:00:13,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:00:13,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-15 00:00:13,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:00:13,589 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:00:13,590 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2124694624] [2020-10-15 00:00:13,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:00:13,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-15 00:00:13,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111427358] [2020-10-15 00:00:13,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-15 00:00:13,591 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:00:13,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-15 00:00:13,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=410, Invalid=520, Unknown=0, NotChecked=0, Total=930 [2020-10-15 00:00:13,592 INFO L87 Difference]: Start difference. First operand 65 states and 91 transitions. Second operand 31 states. [2020-10-15 00:00:14,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:00:14,611 INFO L93 Difference]: Finished difference Result 74 states and 102 transitions. [2020-10-15 00:00:14,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-15 00:00:14,612 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 64 [2020-10-15 00:00:14,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:00:14,613 INFO L225 Difference]: With dead ends: 74 [2020-10-15 00:00:14,613 INFO L226 Difference]: Without dead ends: 68 [2020-10-15 00:00:14,615 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1278, Invalid=2144, Unknown=0, NotChecked=0, Total=3422 [2020-10-15 00:00:14,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-15 00:00:14,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2020-10-15 00:00:14,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-15 00:00:14,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 94 transitions. [2020-10-15 00:00:14,619 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 94 transitions. Word has length 64 [2020-10-15 00:00:14,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:00:14,619 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 94 transitions. [2020-10-15 00:00:14,620 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-15 00:00:14,620 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 94 transitions. [2020-10-15 00:00:14,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-15 00:00:14,620 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:00:14,620 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:00:14,620 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-15 00:00:14,621 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:00:14,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:00:14,621 INFO L82 PathProgramCache]: Analyzing trace with hash 450280333, now seen corresponding path program 27 times [2020-10-15 00:00:14,621 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:00:14,621 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [622008011] [2020-10-15 00:00:14,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:00:14,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:14,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:14,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:15,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:15,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-15 00:00:15,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:00:15,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 851 [2020-10-15 00:00:15,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:15,482 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:15,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-15 00:00:15,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-15 00:00:15,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-15 00:00:15,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:16,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:00:16,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:16,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:16,078 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:16,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:00:16,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:00:16,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:00:16,079 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:16,079 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:16,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:00:16,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:00:16,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-15 00:00:16,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:16,085 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:00:16,086 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [622008011] [2020-10-15 00:00:16,086 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:00:16,086 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-15 00:00:16,086 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196873713] [2020-10-15 00:00:16,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-15 00:00:16,086 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:00:16,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-15 00:00:16,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=439, Invalid=553, Unknown=0, NotChecked=0, Total=992 [2020-10-15 00:00:16,087 INFO L87 Difference]: Start difference. First operand 67 states and 94 transitions. Second operand 32 states. [2020-10-15 00:00:17,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:00:17,276 INFO L93 Difference]: Finished difference Result 76 states and 105 transitions. [2020-10-15 00:00:17,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 00:00:17,276 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 66 [2020-10-15 00:00:17,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:00:17,277 INFO L225 Difference]: With dead ends: 76 [2020-10-15 00:00:17,278 INFO L226 Difference]: Without dead ends: 70 [2020-10-15 00:00:17,279 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1367, Invalid=2293, Unknown=0, NotChecked=0, Total=3660 [2020-10-15 00:00:17,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-15 00:00:17,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2020-10-15 00:00:17,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-15 00:00:17,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 97 transitions. [2020-10-15 00:00:17,284 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 97 transitions. Word has length 66 [2020-10-15 00:00:17,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:00:17,284 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 97 transitions. [2020-10-15 00:00:17,284 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-15 00:00:17,284 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 97 transitions. [2020-10-15 00:00:17,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-15 00:00:17,284 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:00:17,284 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:00:17,285 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-15 00:00:17,285 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:00:17,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:00:17,285 INFO L82 PathProgramCache]: Analyzing trace with hash -395078512, now seen corresponding path program 28 times [2020-10-15 00:00:17,285 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:00:17,285 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [211065528] [2020-10-15 00:00:17,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:00:17,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:17,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:17,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:17,933 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:17,934 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-15 00:00:17,934 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:00:17,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 636 [2020-10-15 00:00:17,935 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:17,935 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:17,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-15 00:00:17,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-15 00:00:17,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-15 00:00:17,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:00:18,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:00:18,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:18,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:18,596 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:18,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:00:18,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:00:18,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:00:18,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:18,596 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:18,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:00:18,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:00:18,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-15 00:00:18,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:18,603 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:00:18,603 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [211065528] [2020-10-15 00:00:18,603 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:00:18,603 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-15 00:00:18,603 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254313016] [2020-10-15 00:00:18,604 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-15 00:00:18,604 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:00:18,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-15 00:00:18,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=469, Invalid=587, Unknown=0, NotChecked=0, Total=1056 [2020-10-15 00:00:18,605 INFO L87 Difference]: Start difference. First operand 69 states and 97 transitions. Second operand 33 states. [2020-10-15 00:00:19,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:00:19,873 INFO L93 Difference]: Finished difference Result 78 states and 108 transitions. [2020-10-15 00:00:19,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-15 00:00:19,874 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 68 [2020-10-15 00:00:19,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:00:19,875 INFO L225 Difference]: With dead ends: 78 [2020-10-15 00:00:19,875 INFO L226 Difference]: Without dead ends: 72 [2020-10-15 00:00:19,878 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1459, Invalid=2447, Unknown=0, NotChecked=0, Total=3906 [2020-10-15 00:00:19,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-15 00:00:19,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2020-10-15 00:00:19,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-15 00:00:19,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 100 transitions. [2020-10-15 00:00:19,882 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 100 transitions. Word has length 68 [2020-10-15 00:00:19,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:00:19,882 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 100 transitions. [2020-10-15 00:00:19,882 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-15 00:00:19,882 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 100 transitions. [2020-10-15 00:00:19,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-15 00:00:19,883 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:00:19,883 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:00:19,883 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-15 00:00:19,883 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:00:19,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:00:19,884 INFO L82 PathProgramCache]: Analyzing trace with hash -1036109613, now seen corresponding path program 29 times [2020-10-15 00:00:19,884 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:00:19,884 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2094295149] [2020-10-15 00:00:19,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:00:19,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:19,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:20,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:20,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:20,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-15 00:00:20,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:00:20,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1006 [2020-10-15 00:00:20,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:20,900 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:20,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-15 00:00:20,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-15 00:00:20,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-15 00:00:20,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:21,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:00:21,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:21,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:21,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:21,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:00:21,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:00:21,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:00:21,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:21,587 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:21,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:00:21,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:00:21,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-15 00:00:21,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:21,596 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:00:21,596 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2094295149] [2020-10-15 00:00:21,596 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:00:21,596 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-15 00:00:21,596 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312142018] [2020-10-15 00:00:21,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-15 00:00:21,597 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:00:21,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-15 00:00:21,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=500, Invalid=622, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 00:00:21,598 INFO L87 Difference]: Start difference. First operand 71 states and 100 transitions. Second operand 34 states. [2020-10-15 00:00:22,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:00:22,941 INFO L93 Difference]: Finished difference Result 80 states and 111 transitions. [2020-10-15 00:00:22,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 00:00:22,942 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 70 [2020-10-15 00:00:22,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:00:22,943 INFO L225 Difference]: With dead ends: 80 [2020-10-15 00:00:22,943 INFO L226 Difference]: Without dead ends: 74 [2020-10-15 00:00:22,946 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1554, Invalid=2606, Unknown=0, NotChecked=0, Total=4160 [2020-10-15 00:00:22,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-15 00:00:22,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2020-10-15 00:00:22,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-15 00:00:22,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 103 transitions. [2020-10-15 00:00:22,951 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 103 transitions. Word has length 70 [2020-10-15 00:00:22,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:00:22,952 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 103 transitions. [2020-10-15 00:00:22,952 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-15 00:00:22,952 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 103 transitions. [2020-10-15 00:00:22,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-15 00:00:22,953 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:00:22,953 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:00:22,953 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-15 00:00:22,953 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:00:22,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:00:22,954 INFO L82 PathProgramCache]: Analyzing trace with hash 1408292950, now seen corresponding path program 30 times [2020-10-15 00:00:22,954 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:00:22,954 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [228565089] [2020-10-15 00:00:22,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:00:22,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:22,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:23,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:23,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:23,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-15 00:00:23,717 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:00:23,717 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 749 [2020-10-15 00:00:23,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:23,717 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:23,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-15 00:00:23,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-15 00:00:23,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-15 00:00:23,718 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:24,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:00:24,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:24,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:24,446 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:24,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:00:24,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:00:24,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:00:24,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:24,446 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:24,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:00:24,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:00:24,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-15 00:00:24,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:24,453 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:00:24,454 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [228565089] [2020-10-15 00:00:24,454 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:00:24,454 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-15 00:00:24,454 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775129139] [2020-10-15 00:00:24,454 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-15 00:00:24,455 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:00:24,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-15 00:00:24,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=532, Invalid=658, Unknown=0, NotChecked=0, Total=1190 [2020-10-15 00:00:24,456 INFO L87 Difference]: Start difference. First operand 73 states and 103 transitions. Second operand 35 states. [2020-10-15 00:00:25,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:00:25,881 INFO L93 Difference]: Finished difference Result 82 states and 114 transitions. [2020-10-15 00:00:25,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-15 00:00:25,882 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 72 [2020-10-15 00:00:25,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:00:25,883 INFO L225 Difference]: With dead ends: 82 [2020-10-15 00:00:25,883 INFO L226 Difference]: Without dead ends: 76 [2020-10-15 00:00:25,885 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1652, Invalid=2770, Unknown=0, NotChecked=0, Total=4422 [2020-10-15 00:00:25,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-15 00:00:25,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2020-10-15 00:00:25,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-15 00:00:25,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 106 transitions. [2020-10-15 00:00:25,889 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 106 transitions. Word has length 72 [2020-10-15 00:00:25,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:00:25,890 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 106 transitions. [2020-10-15 00:00:25,890 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-15 00:00:25,890 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 106 transitions. [2020-10-15 00:00:25,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-15 00:00:25,891 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:00:25,891 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:00:25,891 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-15 00:00:25,892 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:00:25,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:00:25,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1132045081, now seen corresponding path program 31 times [2020-10-15 00:00:25,893 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:00:25,893 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1988273041] [2020-10-15 00:00:25,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:00:25,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:25,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:26,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:26,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:26,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-15 00:00:26,602 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:00:26,602 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 697 [2020-10-15 00:00:26,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:26,603 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:26,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-15 00:00:26,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-15 00:00:26,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-15 00:00:26,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:27,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:00:27,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:27,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:27,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:27,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:00:27,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:00:27,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:00:27,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:27,381 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:27,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:00:27,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:00:27,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-15 00:00:27,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:27,390 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:00:27,391 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1988273041] [2020-10-15 00:00:27,391 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:00:27,391 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-15 00:00:27,391 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230038677] [2020-10-15 00:00:27,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-15 00:00:27,392 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:00:27,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-15 00:00:27,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=565, Invalid=695, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 00:00:27,392 INFO L87 Difference]: Start difference. First operand 75 states and 106 transitions. Second operand 36 states. [2020-10-15 00:00:28,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:00:28,709 INFO L93 Difference]: Finished difference Result 84 states and 117 transitions. [2020-10-15 00:00:28,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-15 00:00:28,710 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 74 [2020-10-15 00:00:28,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:00:28,711 INFO L225 Difference]: With dead ends: 84 [2020-10-15 00:00:28,711 INFO L226 Difference]: Without dead ends: 78 [2020-10-15 00:00:28,712 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1753, Invalid=2939, Unknown=0, NotChecked=0, Total=4692 [2020-10-15 00:00:28,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-15 00:00:28,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2020-10-15 00:00:28,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-15 00:00:28,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 109 transitions. [2020-10-15 00:00:28,716 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 109 transitions. Word has length 74 [2020-10-15 00:00:28,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:00:28,717 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 109 transitions. [2020-10-15 00:00:28,717 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-15 00:00:28,717 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 109 transitions. [2020-10-15 00:00:28,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-15 00:00:28,718 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:00:28,718 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:00:28,718 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-15 00:00:28,718 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:00:28,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:00:28,718 INFO L82 PathProgramCache]: Analyzing trace with hash 1945815324, now seen corresponding path program 32 times [2020-10-15 00:00:28,719 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:00:28,719 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1942056893] [2020-10-15 00:00:28,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:00:28,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:28,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:28,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:29,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:29,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-15 00:00:29,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:00:29,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 799 [2020-10-15 00:00:29,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:29,530 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:29,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-15 00:00:29,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-15 00:00:29,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-15 00:00:29,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:30,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:00:30,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:30,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:30,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:30,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:00:30,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:00:30,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:00:30,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:30,387 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:30,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:00:30,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:00:30,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-15 00:00:30,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:30,395 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:00:30,395 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1942056893] [2020-10-15 00:00:30,395 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:00:30,395 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-15 00:00:30,396 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342821140] [2020-10-15 00:00:30,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-15 00:00:30,396 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:00:30,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-15 00:00:30,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=599, Invalid=733, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 00:00:30,397 INFO L87 Difference]: Start difference. First operand 77 states and 109 transitions. Second operand 37 states. [2020-10-15 00:00:31,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:00:31,989 INFO L93 Difference]: Finished difference Result 86 states and 120 transitions. [2020-10-15 00:00:31,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-15 00:00:31,990 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 76 [2020-10-15 00:00:31,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:00:31,991 INFO L225 Difference]: With dead ends: 86 [2020-10-15 00:00:31,991 INFO L226 Difference]: Without dead ends: 80 [2020-10-15 00:00:31,992 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1857, Invalid=3113, Unknown=0, NotChecked=0, Total=4970 [2020-10-15 00:00:31,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-15 00:00:31,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2020-10-15 00:00:31,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-15 00:00:31,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 112 transitions. [2020-10-15 00:00:31,997 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 112 transitions. Word has length 76 [2020-10-15 00:00:31,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:00:31,997 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 112 transitions. [2020-10-15 00:00:31,998 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-15 00:00:31,998 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 112 transitions. [2020-10-15 00:00:31,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-15 00:00:31,999 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:00:31,999 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:00:31,999 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-15 00:00:31,999 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:00:32,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:00:32,000 INFO L82 PathProgramCache]: Analyzing trace with hash -1999996321, now seen corresponding path program 33 times [2020-10-15 00:00:32,000 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:00:32,000 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [407405757] [2020-10-15 00:00:32,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:00:32,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:32,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:32,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:34,078 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:34,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-15 00:00:34,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:00:34,079 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2058 [2020-10-15 00:00:34,079 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:34,080 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:34,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-15 00:00:34,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-15 00:00:34,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-15 00:00:34,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:34,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:00:34,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:34,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:34,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:34,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:00:34,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:00:34,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:00:34,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:34,981 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:34,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:00:34,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:00:34,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-15 00:00:34,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:34,989 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:00:34,989 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [407405757] [2020-10-15 00:00:34,989 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:00:34,989 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-15 00:00:34,989 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76814640] [2020-10-15 00:00:34,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-15 00:00:34,990 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:00:34,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-15 00:00:34,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=634, Invalid=772, Unknown=0, NotChecked=0, Total=1406 [2020-10-15 00:00:34,991 INFO L87 Difference]: Start difference. First operand 79 states and 112 transitions. Second operand 38 states. [2020-10-15 00:00:36,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:00:36,482 INFO L93 Difference]: Finished difference Result 88 states and 123 transitions. [2020-10-15 00:00:36,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-15 00:00:36,483 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 78 [2020-10-15 00:00:36,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:00:36,484 INFO L225 Difference]: With dead ends: 88 [2020-10-15 00:00:36,484 INFO L226 Difference]: Without dead ends: 82 [2020-10-15 00:00:36,486 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1964, Invalid=3292, Unknown=0, NotChecked=0, Total=5256 [2020-10-15 00:00:36,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-15 00:00:36,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2020-10-15 00:00:36,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-15 00:00:36,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 115 transitions. [2020-10-15 00:00:36,494 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 115 transitions. Word has length 78 [2020-10-15 00:00:36,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:00:36,494 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 115 transitions. [2020-10-15 00:00:36,494 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-15 00:00:36,494 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 115 transitions. [2020-10-15 00:00:36,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-15 00:00:36,496 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:00:36,496 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:00:36,497 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-15 00:00:36,497 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:00:36,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:00:36,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1468864798, now seen corresponding path program 34 times [2020-10-15 00:00:36,497 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:00:36,497 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1669726724] [2020-10-15 00:00:36,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:00:36,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:36,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:36,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:37,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:37,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-15 00:00:37,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:00:37,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1081 [2020-10-15 00:00:37,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:37,596 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:37,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-15 00:00:37,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-15 00:00:37,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-15 00:00:37,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:38,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:00:38,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:38,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:38,535 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:38,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:00:38,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:00:38,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:00:38,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:38,536 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:38,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:00:38,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:00:38,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-15 00:00:38,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:38,545 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:00:38,546 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1669726724] [2020-10-15 00:00:38,546 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:00:38,546 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-15 00:00:38,546 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158949742] [2020-10-15 00:00:38,546 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-15 00:00:38,547 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:00:38,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-15 00:00:38,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=670, Invalid=812, Unknown=0, NotChecked=0, Total=1482 [2020-10-15 00:00:38,547 INFO L87 Difference]: Start difference. First operand 81 states and 115 transitions. Second operand 39 states. [2020-10-15 00:00:40,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:00:40,325 INFO L93 Difference]: Finished difference Result 90 states and 126 transitions. [2020-10-15 00:00:40,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-15 00:00:40,326 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 80 [2020-10-15 00:00:40,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:00:40,327 INFO L225 Difference]: With dead ends: 90 [2020-10-15 00:00:40,327 INFO L226 Difference]: Without dead ends: 84 [2020-10-15 00:00:40,328 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2074, Invalid=3476, Unknown=0, NotChecked=0, Total=5550 [2020-10-15 00:00:40,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-15 00:00:40,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2020-10-15 00:00:40,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-15 00:00:40,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 118 transitions. [2020-10-15 00:00:40,333 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 118 transitions. Word has length 80 [2020-10-15 00:00:40,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:00:40,333 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 118 transitions. [2020-10-15 00:00:40,333 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-15 00:00:40,334 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 118 transitions. [2020-10-15 00:00:40,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-15 00:00:40,334 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:00:40,335 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:00:40,335 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-15 00:00:40,335 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:00:40,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:00:40,335 INFO L82 PathProgramCache]: Analyzing trace with hash 2142387877, now seen corresponding path program 35 times [2020-10-15 00:00:40,335 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:00:40,335 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1121477797] [2020-10-15 00:00:40,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:00:40,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:40,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:40,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:41,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:41,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-15 00:00:41,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:00:41,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1227 [2020-10-15 00:00:41,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:41,578 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:41,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-15 00:00:41,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-15 00:00:41,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-15 00:00:41,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:42,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:00:42,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:42,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:42,634 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:42,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:00:42,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:00:42,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:00:42,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:42,634 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:42,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:00:42,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:00:42,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-15 00:00:42,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:42,643 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:00:42,643 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1121477797] [2020-10-15 00:00:42,643 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:00:42,643 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-15 00:00:42,643 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418098776] [2020-10-15 00:00:42,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-15 00:00:42,644 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:00:42,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-15 00:00:42,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=707, Invalid=853, Unknown=0, NotChecked=0, Total=1560 [2020-10-15 00:00:42,644 INFO L87 Difference]: Start difference. First operand 83 states and 118 transitions. Second operand 40 states. [2020-10-15 00:00:44,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:00:44,487 INFO L93 Difference]: Finished difference Result 92 states and 129 transitions. [2020-10-15 00:00:44,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-15 00:00:44,487 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 82 [2020-10-15 00:00:44,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:00:44,489 INFO L225 Difference]: With dead ends: 92 [2020-10-15 00:00:44,489 INFO L226 Difference]: Without dead ends: 86 [2020-10-15 00:00:44,490 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2187, Invalid=3665, Unknown=0, NotChecked=0, Total=5852 [2020-10-15 00:00:44,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-15 00:00:44,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2020-10-15 00:00:44,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-15 00:00:44,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 121 transitions. [2020-10-15 00:00:44,495 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 121 transitions. Word has length 82 [2020-10-15 00:00:44,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:00:44,495 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 121 transitions. [2020-10-15 00:00:44,496 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-15 00:00:44,496 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 121 transitions. [2020-10-15 00:00:44,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-15 00:00:44,496 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:00:44,497 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:00:44,497 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-15 00:00:44,497 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:00:44,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:00:44,497 INFO L82 PathProgramCache]: Analyzing trace with hash -2072333912, now seen corresponding path program 36 times [2020-10-15 00:00:44,497 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:00:44,498 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1688614455] [2020-10-15 00:00:44,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:00:44,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:44,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:44,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:45,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:45,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-15 00:00:45,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:00:45,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 902 [2020-10-15 00:00:45,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:45,415 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:45,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-15 00:00:45,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-15 00:00:45,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-15 00:00:45,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:46,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:00:46,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:46,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:46,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:46,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:00:46,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:00:46,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:00:46,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:46,479 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:46,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:00:46,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:00:46,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-15 00:00:46,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:46,489 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:00:46,489 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1688614455] [2020-10-15 00:00:46,489 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:00:46,489 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-15 00:00:46,490 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540797820] [2020-10-15 00:00:46,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-15 00:00:46,490 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:00:46,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-15 00:00:46,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=745, Invalid=895, Unknown=0, NotChecked=0, Total=1640 [2020-10-15 00:00:46,491 INFO L87 Difference]: Start difference. First operand 85 states and 121 transitions. Second operand 41 states. [2020-10-15 00:00:48,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:00:48,374 INFO L93 Difference]: Finished difference Result 94 states and 132 transitions. [2020-10-15 00:00:48,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-15 00:00:48,375 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 84 [2020-10-15 00:00:48,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:00:48,376 INFO L225 Difference]: With dead ends: 94 [2020-10-15 00:00:48,376 INFO L226 Difference]: Without dead ends: 88 [2020-10-15 00:00:48,378 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2303, Invalid=3859, Unknown=0, NotChecked=0, Total=6162 [2020-10-15 00:00:48,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-15 00:00:48,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2020-10-15 00:00:48,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-15 00:00:48,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 124 transitions. [2020-10-15 00:00:48,382 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 124 transitions. Word has length 84 [2020-10-15 00:00:48,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:00:48,383 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 124 transitions. [2020-10-15 00:00:48,383 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-15 00:00:48,383 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 124 transitions. [2020-10-15 00:00:48,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-15 00:00:48,384 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:00:48,384 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:00:48,384 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-15 00:00:48,384 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:00:48,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:00:48,385 INFO L82 PathProgramCache]: Analyzing trace with hash 2029154283, now seen corresponding path program 37 times [2020-10-15 00:00:48,385 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:00:48,385 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1471736463] [2020-10-15 00:00:48,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:00:48,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:48,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:48,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:49,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:49,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-15 00:00:49,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:00:49,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 784 [2020-10-15 00:00:49,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:49,182 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:49,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-15 00:00:49,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-15 00:00:49,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-15 00:00:49,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:50,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:00:50,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:50,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:50,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:50,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:00:50,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:00:50,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:00:50,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:50,316 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:50,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:00:50,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:00:50,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-15 00:00:50,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:50,325 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:00:50,326 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1471736463] [2020-10-15 00:00:50,326 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:00:50,326 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-15 00:00:50,326 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682028129] [2020-10-15 00:00:50,326 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-15 00:00:50,327 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:00:50,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-15 00:00:50,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=784, Invalid=938, Unknown=0, NotChecked=0, Total=1722 [2020-10-15 00:00:50,327 INFO L87 Difference]: Start difference. First operand 87 states and 124 transitions. Second operand 42 states. [2020-10-15 00:00:52,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:00:52,379 INFO L93 Difference]: Finished difference Result 96 states and 135 transitions. [2020-10-15 00:00:52,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-15 00:00:52,381 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 86 [2020-10-15 00:00:52,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:00:52,382 INFO L225 Difference]: With dead ends: 96 [2020-10-15 00:00:52,382 INFO L226 Difference]: Without dead ends: 90 [2020-10-15 00:00:52,383 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2422, Invalid=4058, Unknown=0, NotChecked=0, Total=6480 [2020-10-15 00:00:52,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-15 00:00:52,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2020-10-15 00:00:52,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-15 00:00:52,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 127 transitions. [2020-10-15 00:00:52,388 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 127 transitions. Word has length 86 [2020-10-15 00:00:52,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:00:52,388 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 127 transitions. [2020-10-15 00:00:52,388 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-15 00:00:52,389 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 127 transitions. [2020-10-15 00:00:52,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-15 00:00:52,390 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:00:52,390 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:00:52,390 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-15 00:00:52,390 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:00:52,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:00:52,391 INFO L82 PathProgramCache]: Analyzing trace with hash 779331950, now seen corresponding path program 38 times [2020-10-15 00:00:52,391 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:00:52,391 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2033573745] [2020-10-15 00:00:52,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:00:52,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:52,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:52,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:53,176 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:53,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-15 00:00:53,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:00:53,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 765 [2020-10-15 00:00:53,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:53,177 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:53,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-15 00:00:53,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-15 00:00:53,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-15 00:00:53,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:54,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:00:54,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:54,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:54,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:54,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:00:54,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:00:54,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:00:54,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:54,334 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:54,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:00:54,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:00:54,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-15 00:00:54,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:54,344 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:00:54,344 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2033573745] [2020-10-15 00:00:54,345 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:00:54,345 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-15 00:00:54,345 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110620570] [2020-10-15 00:00:54,345 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-15 00:00:54,345 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:00:54,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-15 00:00:54,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=824, Invalid=982, Unknown=0, NotChecked=0, Total=1806 [2020-10-15 00:00:54,346 INFO L87 Difference]: Start difference. First operand 89 states and 127 transitions. Second operand 43 states. [2020-10-15 00:00:56,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:00:56,468 INFO L93 Difference]: Finished difference Result 98 states and 138 transitions. [2020-10-15 00:00:56,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-15 00:00:56,469 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 88 [2020-10-15 00:00:56,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:00:56,470 INFO L225 Difference]: With dead ends: 98 [2020-10-15 00:00:56,471 INFO L226 Difference]: Without dead ends: 92 [2020-10-15 00:00:56,472 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2544, Invalid=4262, Unknown=0, NotChecked=0, Total=6806 [2020-10-15 00:00:56,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-15 00:00:56,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2020-10-15 00:00:56,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-15 00:00:56,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 130 transitions. [2020-10-15 00:00:56,478 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 130 transitions. Word has length 88 [2020-10-15 00:00:56,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:00:56,478 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 130 transitions. [2020-10-15 00:00:56,478 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-15 00:00:56,479 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 130 transitions. [2020-10-15 00:00:56,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-15 00:00:56,488 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:00:56,489 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:00:56,489 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-15 00:00:56,489 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:00:56,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:00:56,489 INFO L82 PathProgramCache]: Analyzing trace with hash -2004054479, now seen corresponding path program 39 times [2020-10-15 00:00:56,489 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:00:56,490 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [242796579] [2020-10-15 00:00:56,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:00:56,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:56,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:56,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:57,853 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:57,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-15 00:00:57,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:00:57,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1343 [2020-10-15 00:00:57,853 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:57,854 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:57,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-15 00:00:57,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-15 00:00:57,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-15 00:00:57,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:59,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:00:59,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:59,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:59,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:59,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:00:59,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:00:59,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:00:59,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:59,090 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:59,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:00:59,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:00:59,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-15 00:00:59,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:59,100 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:00:59,100 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [242796579] [2020-10-15 00:00:59,100 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:00:59,100 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-15 00:00:59,100 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452066430] [2020-10-15 00:00:59,100 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-15 00:00:59,101 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:00:59,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-15 00:00:59,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=865, Invalid=1027, Unknown=0, NotChecked=0, Total=1892 [2020-10-15 00:00:59,101 INFO L87 Difference]: Start difference. First operand 91 states and 130 transitions. Second operand 44 states. [2020-10-15 00:01:01,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:01:01,212 INFO L93 Difference]: Finished difference Result 100 states and 141 transitions. [2020-10-15 00:01:01,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-15 00:01:01,213 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 90 [2020-10-15 00:01:01,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:01:01,214 INFO L225 Difference]: With dead ends: 100 [2020-10-15 00:01:01,214 INFO L226 Difference]: Without dead ends: 94 [2020-10-15 00:01:01,215 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2669, Invalid=4471, Unknown=0, NotChecked=0, Total=7140 [2020-10-15 00:01:01,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-15 00:01:01,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2020-10-15 00:01:01,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-15 00:01:01,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 133 transitions. [2020-10-15 00:01:01,221 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 133 transitions. Word has length 90 [2020-10-15 00:01:01,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:01:01,221 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 133 transitions. [2020-10-15 00:01:01,221 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-15 00:01:01,221 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 133 transitions. [2020-10-15 00:01:01,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-15 00:01:01,222 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:01:01,222 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:01:01,222 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-15 00:01:01,222 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:01:01,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:01:01,223 INFO L82 PathProgramCache]: Analyzing trace with hash -1073787340, now seen corresponding path program 40 times [2020-10-15 00:01:01,223 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:01:01,223 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [149199529] [2020-10-15 00:01:01,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:01:01,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:01,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:01,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:02,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:02,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-15 00:01:02,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:01:02,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1212 [2020-10-15 00:01:02,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:02,450 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:02,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-15 00:01:02,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-15 00:01:02,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-15 00:01:02,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:03,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:01:03,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:03,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:03,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:03,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:01:03,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:01:03,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:01:03,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:03,815 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:03,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:01:03,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:01:03,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-15 00:01:03,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:03,826 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:01:03,827 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [149199529] [2020-10-15 00:01:03,827 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:01:03,827 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-15 00:01:03,827 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159444174] [2020-10-15 00:01:03,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-15 00:01:03,827 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:01:03,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-15 00:01:03,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=907, Invalid=1073, Unknown=0, NotChecked=0, Total=1980 [2020-10-15 00:01:03,828 INFO L87 Difference]: Start difference. First operand 93 states and 133 transitions. Second operand 45 states. [2020-10-15 00:01:06,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:01:06,267 INFO L93 Difference]: Finished difference Result 102 states and 144 transitions. [2020-10-15 00:01:06,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-15 00:01:06,268 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 92 [2020-10-15 00:01:06,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:01:06,270 INFO L225 Difference]: With dead ends: 102 [2020-10-15 00:01:06,270 INFO L226 Difference]: Without dead ends: 96 [2020-10-15 00:01:06,271 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2797, Invalid=4685, Unknown=0, NotChecked=0, Total=7482 [2020-10-15 00:01:06,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-15 00:01:06,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2020-10-15 00:01:06,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-15 00:01:06,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 136 transitions. [2020-10-15 00:01:06,276 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 136 transitions. Word has length 92 [2020-10-15 00:01:06,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:01:06,276 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 136 transitions. [2020-10-15 00:01:06,277 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-15 00:01:06,277 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 136 transitions. [2020-10-15 00:01:06,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-15 00:01:06,278 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:01:06,278 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:01:06,278 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-15 00:01:06,278 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:01:06,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:01:06,278 INFO L82 PathProgramCache]: Analyzing trace with hash -440264329, now seen corresponding path program 41 times [2020-10-15 00:01:06,279 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:01:06,279 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1585159481] [2020-10-15 00:01:06,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:01:06,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:06,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:06,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:07,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:07,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-15 00:01:07,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:01:07,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1113 [2020-10-15 00:01:07,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:07,406 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:07,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-15 00:01:07,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-15 00:01:07,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-15 00:01:07,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:08,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:01:08,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:08,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:08,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:08,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:01:08,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:01:08,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:01:08,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:08,784 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:08,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:01:08,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:01:08,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-15 00:01:08,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:08,799 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:01:08,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1585159481] [2020-10-15 00:01:08,799 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:01:08,799 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-15 00:01:08,799 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455386176] [2020-10-15 00:01:08,800 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-15 00:01:08,800 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:01:08,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-15 00:01:08,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=950, Invalid=1120, Unknown=0, NotChecked=0, Total=2070 [2020-10-15 00:01:08,801 INFO L87 Difference]: Start difference. First operand 95 states and 136 transitions. Second operand 46 states. [2020-10-15 00:01:11,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:01:11,222 INFO L93 Difference]: Finished difference Result 104 states and 147 transitions. [2020-10-15 00:01:11,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-15 00:01:11,223 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 94 [2020-10-15 00:01:11,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:01:11,225 INFO L225 Difference]: With dead ends: 104 [2020-10-15 00:01:11,225 INFO L226 Difference]: Without dead ends: 98 [2020-10-15 00:01:11,226 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2928, Invalid=4904, Unknown=0, NotChecked=0, Total=7832 [2020-10-15 00:01:11,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-15 00:01:11,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2020-10-15 00:01:11,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-15 00:01:11,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 139 transitions. [2020-10-15 00:01:11,230 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 139 transitions. Word has length 94 [2020-10-15 00:01:11,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:01:11,231 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 139 transitions. [2020-10-15 00:01:11,231 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-15 00:01:11,231 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 139 transitions. [2020-10-15 00:01:11,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-15 00:01:11,233 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:01:11,233 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:01:11,233 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-15 00:01:11,233 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:01:11,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:01:11,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1510006790, now seen corresponding path program 42 times [2020-10-15 00:01:11,234 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:01:11,234 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1770971163] [2020-10-15 00:01:11,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:01:11,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:11,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:11,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:12,725 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:12,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-15 00:01:12,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:01:12,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1478 [2020-10-15 00:01:12,725 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:12,725 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:12,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-15 00:01:12,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-15 00:01:12,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-15 00:01:12,726 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:14,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:01:14,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:14,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:14,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:14,246 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:01:14,246 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:01:14,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:01:14,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:14,247 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:14,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:01:14,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:01:14,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-15 00:01:14,247 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:14,258 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:01:14,259 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1770971163] [2020-10-15 00:01:14,259 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:01:14,259 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-15 00:01:14,259 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886194243] [2020-10-15 00:01:14,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-15 00:01:14,259 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:01:14,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-15 00:01:14,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=994, Invalid=1168, Unknown=0, NotChecked=0, Total=2162 [2020-10-15 00:01:14,260 INFO L87 Difference]: Start difference. First operand 97 states and 139 transitions. Second operand 47 states. [2020-10-15 00:01:16,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:01:16,866 INFO L93 Difference]: Finished difference Result 106 states and 150 transitions. [2020-10-15 00:01:16,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-15 00:01:16,867 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 96 [2020-10-15 00:01:16,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:01:16,868 INFO L225 Difference]: With dead ends: 106 [2020-10-15 00:01:16,868 INFO L226 Difference]: Without dead ends: 100 [2020-10-15 00:01:16,869 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=3062, Invalid=5128, Unknown=0, NotChecked=0, Total=8190 [2020-10-15 00:01:16,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-15 00:01:16,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2020-10-15 00:01:16,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-15 00:01:16,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 142 transitions. [2020-10-15 00:01:16,875 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 142 transitions. Word has length 96 [2020-10-15 00:01:16,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:01:16,875 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 142 transitions. [2020-10-15 00:01:16,875 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-15 00:01:16,875 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 142 transitions. [2020-10-15 00:01:16,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-15 00:01:16,876 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:01:16,876 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:01:16,876 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-15 00:01:16,877 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:01:16,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:01:16,879 INFO L82 PathProgramCache]: Analyzing trace with hash 1259639229, now seen corresponding path program 43 times [2020-10-15 00:01:16,879 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:01:16,879 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1211308926] [2020-10-15 00:01:16,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:01:16,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:16,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:17,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:18,322 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:18,322 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-15 00:01:18,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:01:18,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1429 [2020-10-15 00:01:18,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:18,323 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:18,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-15 00:01:18,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-15 00:01:18,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-15 00:01:18,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:19,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:01:19,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:19,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:19,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:19,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:01:19,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:01:19,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:01:19,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:19,846 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:19,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:01:19,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:01:19,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-15 00:01:19,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:19,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:01:19,859 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1211308926] [2020-10-15 00:01:19,859 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:01:19,859 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-15 00:01:19,859 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969318269] [2020-10-15 00:01:19,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-15 00:01:19,860 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:01:19,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-15 00:01:19,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1039, Invalid=1217, Unknown=0, NotChecked=0, Total=2256 [2020-10-15 00:01:19,861 INFO L87 Difference]: Start difference. First operand 99 states and 142 transitions. Second operand 48 states. [2020-10-15 00:01:22,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:01:22,423 INFO L93 Difference]: Finished difference Result 108 states and 153 transitions. [2020-10-15 00:01:22,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-15 00:01:22,423 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 98 [2020-10-15 00:01:22,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:01:22,425 INFO L225 Difference]: With dead ends: 108 [2020-10-15 00:01:22,425 INFO L226 Difference]: Without dead ends: 102 [2020-10-15 00:01:22,426 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=3199, Invalid=5357, Unknown=0, NotChecked=0, Total=8556 [2020-10-15 00:01:22,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-15 00:01:22,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2020-10-15 00:01:22,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-15 00:01:22,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 145 transitions. [2020-10-15 00:01:22,431 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 145 transitions. Word has length 98 [2020-10-15 00:01:22,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:01:22,431 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 145 transitions. [2020-10-15 00:01:22,431 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-15 00:01:22,431 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 145 transitions. [2020-10-15 00:01:22,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-15 00:01:22,432 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:01:22,432 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:01:22,432 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-15 00:01:22,433 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:01:22,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:01:22,433 INFO L82 PathProgramCache]: Analyzing trace with hash 9739968, now seen corresponding path program 44 times [2020-10-15 00:01:22,433 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:01:22,433 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1801486539] [2020-10-15 00:01:22,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:01:22,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:22,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:22,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:23,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:23,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-15 00:01:23,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:01:23,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1452 [2020-10-15 00:01:23,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:23,900 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:23,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-15 00:01:23,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-15 00:01:23,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-15 00:01:23,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:25,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:01:25,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:25,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:25,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:25,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:01:25,508 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:01:25,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:01:25,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:25,508 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:25,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:01:25,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:01:25,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-15 00:01:25,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:25,521 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:01:25,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1801486539] [2020-10-15 00:01:25,521 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:01:25,522 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-15 00:01:25,522 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413638076] [2020-10-15 00:01:25,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-15 00:01:25,522 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:01:25,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-15 00:01:25,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1085, Invalid=1267, Unknown=0, NotChecked=0, Total=2352 [2020-10-15 00:01:25,523 INFO L87 Difference]: Start difference. First operand 101 states and 145 transitions. Second operand 49 states. [2020-10-15 00:01:28,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:01:28,225 INFO L93 Difference]: Finished difference Result 110 states and 156 transitions. [2020-10-15 00:01:28,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-15 00:01:28,226 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 100 [2020-10-15 00:01:28,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:01:28,228 INFO L225 Difference]: With dead ends: 110 [2020-10-15 00:01:28,228 INFO L226 Difference]: Without dead ends: 104 [2020-10-15 00:01:28,229 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=3339, Invalid=5591, Unknown=0, NotChecked=0, Total=8930 [2020-10-15 00:01:28,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-15 00:01:28,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2020-10-15 00:01:28,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-15 00:01:28,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 148 transitions. [2020-10-15 00:01:28,234 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 148 transitions. Word has length 100 [2020-10-15 00:01:28,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:01:28,235 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 148 transitions. [2020-10-15 00:01:28,235 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-15 00:01:28,235 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 148 transitions. [2020-10-15 00:01:28,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-15 00:01:28,235 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:01:28,236 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:01:28,236 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-15 00:01:28,236 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:01:28,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:01:28,236 INFO L82 PathProgramCache]: Analyzing trace with hash 1447393027, now seen corresponding path program 45 times [2020-10-15 00:01:28,236 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:01:28,237 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [394969505] [2020-10-15 00:01:28,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:01:28,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:28,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:28,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:30,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:30,400 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-15 00:01:30,400 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:01:30,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2148 [2020-10-15 00:01:30,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:30,400 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:30,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-15 00:01:30,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-15 00:01:30,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-15 00:01:30,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:32,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:01:32,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:32,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:32,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:32,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:01:32,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:01:32,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:01:32,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:32,111 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:32,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:01:32,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:01:32,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-15 00:01:32,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:32,123 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:01:32,123 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [394969505] [2020-10-15 00:01:32,123 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:01:32,123 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-15 00:01:32,124 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429432524] [2020-10-15 00:01:32,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-15 00:01:32,124 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:01:32,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-15 00:01:32,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1132, Invalid=1318, Unknown=0, NotChecked=0, Total=2450 [2020-10-15 00:01:32,125 INFO L87 Difference]: Start difference. First operand 103 states and 148 transitions. Second operand 50 states. [2020-10-15 00:01:35,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:01:35,117 INFO L93 Difference]: Finished difference Result 112 states and 159 transitions. [2020-10-15 00:01:35,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-15 00:01:35,118 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 102 [2020-10-15 00:01:35,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:01:35,119 INFO L225 Difference]: With dead ends: 112 [2020-10-15 00:01:35,119 INFO L226 Difference]: Without dead ends: 106 [2020-10-15 00:01:35,120 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=3482, Invalid=5830, Unknown=0, NotChecked=0, Total=9312 [2020-10-15 00:01:35,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-15 00:01:35,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2020-10-15 00:01:35,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-15 00:01:35,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 151 transitions. [2020-10-15 00:01:35,125 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 151 transitions. Word has length 102 [2020-10-15 00:01:35,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:01:35,125 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 151 transitions. [2020-10-15 00:01:35,125 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-15 00:01:35,125 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 151 transitions. [2020-10-15 00:01:35,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-15 00:01:35,126 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:01:35,126 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:01:35,127 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-15 00:01:35,127 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:01:35,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:01:35,127 INFO L82 PathProgramCache]: Analyzing trace with hash 52513414, now seen corresponding path program 46 times [2020-10-15 00:01:35,127 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:01:35,127 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1616217826] [2020-10-15 00:01:35,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:01:35,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:35,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:35,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:36,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:36,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-15 00:01:36,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:01:36,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1567 [2020-10-15 00:01:36,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:36,708 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:36,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 49 [2020-10-15 00:01:36,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-15 00:01:36,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-10-15 00:01:36,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:38,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:01:38,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:38,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:38,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:38,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:01:38,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:01:38,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:01:38,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:38,655 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:38,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:01:38,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:01:38,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-15 00:01:38,655 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:38,668 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:01:38,668 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1616217826] [2020-10-15 00:01:38,668 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:01:38,669 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-15 00:01:38,669 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214980703] [2020-10-15 00:01:38,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-15 00:01:38,669 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:01:38,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-15 00:01:38,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1180, Invalid=1370, Unknown=0, NotChecked=0, Total=2550 [2020-10-15 00:01:38,670 INFO L87 Difference]: Start difference. First operand 105 states and 151 transitions. Second operand 51 states. [2020-10-15 00:01:41,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:01:41,871 INFO L93 Difference]: Finished difference Result 114 states and 162 transitions. [2020-10-15 00:01:41,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-15 00:01:41,879 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 104 [2020-10-15 00:01:41,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:01:41,880 INFO L225 Difference]: With dead ends: 114 [2020-10-15 00:01:41,880 INFO L226 Difference]: Without dead ends: 108 [2020-10-15 00:01:41,881 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1127 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=3628, Invalid=6074, Unknown=0, NotChecked=0, Total=9702 [2020-10-15 00:01:41,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-15 00:01:41,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2020-10-15 00:01:41,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-15 00:01:41,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 154 transitions. [2020-10-15 00:01:41,886 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 154 transitions. Word has length 104 [2020-10-15 00:01:41,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:01:41,886 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 154 transitions. [2020-10-15 00:01:41,886 INFO L480 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-15 00:01:41,887 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 154 transitions. [2020-10-15 00:01:41,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-15 00:01:41,887 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:01:41,887 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:01:41,888 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-15 00:01:41,888 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:01:41,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:01:41,888 INFO L82 PathProgramCache]: Analyzing trace with hash -396998327, now seen corresponding path program 47 times [2020-10-15 00:01:41,888 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:01:41,888 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1835097438] [2020-10-15 00:01:41,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:01:41,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:41,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:42,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:43,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:43,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-15 00:01:43,712 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:01:43,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1802 [2020-10-15 00:01:43,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:43,712 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:43,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 50 [2020-10-15 00:01:43,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-15 00:01:43,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-15 00:01:43,713 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:45,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:01:45,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:45,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:45,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:45,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:01:45,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:01:45,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:01:45,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:45,675 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:45,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:01:45,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:01:45,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-15 00:01:45,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:45,693 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:01:45,693 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1835097438] [2020-10-15 00:01:45,693 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:01:45,693 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-10-15 00:01:45,693 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162059474] [2020-10-15 00:01:45,693 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-15 00:01:45,694 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:01:45,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-15 00:01:45,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1229, Invalid=1423, Unknown=0, NotChecked=0, Total=2652 [2020-10-15 00:01:45,694 INFO L87 Difference]: Start difference. First operand 107 states and 154 transitions. Second operand 52 states. [2020-10-15 00:01:49,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:01:49,016 INFO L93 Difference]: Finished difference Result 116 states and 165 transitions. [2020-10-15 00:01:49,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-15 00:01:49,017 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 106 [2020-10-15 00:01:49,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:01:49,019 INFO L225 Difference]: With dead ends: 116 [2020-10-15 00:01:49,019 INFO L226 Difference]: Without dead ends: 110 [2020-10-15 00:01:49,020 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=3777, Invalid=6323, Unknown=0, NotChecked=0, Total=10100 [2020-10-15 00:01:49,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-15 00:01:49,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2020-10-15 00:01:49,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-15 00:01:49,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 157 transitions. [2020-10-15 00:01:49,025 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 157 transitions. Word has length 106 [2020-10-15 00:01:49,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:01:49,025 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 157 transitions. [2020-10-15 00:01:49,025 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-15 00:01:49,025 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 157 transitions. [2020-10-15 00:01:49,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-15 00:01:49,026 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:01:49,026 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:01:49,026 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-15 00:01:49,026 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:01:49,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:01:49,026 INFO L82 PathProgramCache]: Analyzing trace with hash 1413915468, now seen corresponding path program 48 times [2020-10-15 00:01:49,027 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:01:49,027 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1069161349] [2020-10-15 00:01:49,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:01:49,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:49,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:49,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:51,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:51,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-15 00:01:51,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:01:51,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2301 [2020-10-15 00:01:51,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:51,342 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:51,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 51 [2020-10-15 00:01:51,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-15 00:01:51,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-15 00:01:51,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:53,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:01:53,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:53,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:53,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:53,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:01:53,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:01:53,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:01:53,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:53,460 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:53,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:01:53,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:01:53,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-15 00:01:53,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:53,475 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:01:53,475 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1069161349] [2020-10-15 00:01:53,475 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:01:53,475 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-10-15 00:01:53,475 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458416866] [2020-10-15 00:01:53,475 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-15 00:01:53,475 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:01:53,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-15 00:01:53,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1279, Invalid=1477, Unknown=0, NotChecked=0, Total=2756 [2020-10-15 00:01:53,476 INFO L87 Difference]: Start difference. First operand 109 states and 157 transitions. Second operand 53 states. [2020-10-15 00:01:56,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:01:56,854 INFO L93 Difference]: Finished difference Result 118 states and 168 transitions. [2020-10-15 00:01:56,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-15 00:01:56,855 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 108 [2020-10-15 00:01:56,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:01:56,856 INFO L225 Difference]: With dead ends: 118 [2020-10-15 00:01:56,856 INFO L226 Difference]: Without dead ends: 112 [2020-10-15 00:01:56,857 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=3929, Invalid=6577, Unknown=0, NotChecked=0, Total=10506 [2020-10-15 00:01:56,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-15 00:01:56,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2020-10-15 00:01:56,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-15 00:01:56,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 160 transitions. [2020-10-15 00:01:56,865 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 160 transitions. Word has length 108 [2020-10-15 00:01:56,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:01:56,865 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 160 transitions. [2020-10-15 00:01:56,865 INFO L480 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-15 00:01:56,865 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 160 transitions. [2020-10-15 00:01:56,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-15 00:01:56,866 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:01:56,866 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:01:56,866 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-15 00:01:56,866 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:01:56,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:01:56,867 INFO L82 PathProgramCache]: Analyzing trace with hash -2054649713, now seen corresponding path program 49 times [2020-10-15 00:01:56,867 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:01:56,867 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1816096997] [2020-10-15 00:01:56,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:01:56,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:56,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:57,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:58,403 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:58,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-15 00:01:58,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:01:58,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1519 [2020-10-15 00:01:58,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:58,404 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:58,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 52 [2020-10-15 00:01:58,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-15 00:01:58,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-15 00:01:58,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:00,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:00,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:00,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:00,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:00,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:02:00,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:00,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:02:00,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:00,662 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:00,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:02:00,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:00,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-15 00:02:00,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:00,676 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:02:00,676 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1816096997] [2020-10-15 00:02:00,677 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:00,677 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-15 00:02:00,677 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873707994] [2020-10-15 00:02:00,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-10-15 00:02:00,677 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:00,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-10-15 00:02:00,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1330, Invalid=1532, Unknown=0, NotChecked=0, Total=2862 [2020-10-15 00:02:00,678 INFO L87 Difference]: Start difference. First operand 111 states and 160 transitions. Second operand 54 states. [2020-10-15 00:02:04,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:04,162 INFO L93 Difference]: Finished difference Result 120 states and 171 transitions. [2020-10-15 00:02:04,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-15 00:02:04,163 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 110 [2020-10-15 00:02:04,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:04,165 INFO L225 Difference]: With dead ends: 120 [2020-10-15 00:02:04,165 INFO L226 Difference]: Without dead ends: 114 [2020-10-15 00:02:04,166 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1274 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=4084, Invalid=6836, Unknown=0, NotChecked=0, Total=10920 [2020-10-15 00:02:04,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-15 00:02:04,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2020-10-15 00:02:04,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-15 00:02:04,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 163 transitions. [2020-10-15 00:02:04,172 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 163 transitions. Word has length 110 [2020-10-15 00:02:04,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:04,172 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 163 transitions. [2020-10-15 00:02:04,172 INFO L480 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-10-15 00:02:04,173 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 163 transitions. [2020-10-15 00:02:04,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-15 00:02:04,173 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:04,173 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:04,174 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-15 00:02:04,174 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:04,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:04,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1843800338, now seen corresponding path program 50 times [2020-10-15 00:02:04,174 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:04,174 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1926084734] [2020-10-15 00:02:04,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:04,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:04,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:04,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:05,322 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:05,322 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-15 00:02:05,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:02:05,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1126 [2020-10-15 00:02:05,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:05,323 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:05,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 53 [2020-10-15 00:02:05,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-15 00:02:05,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-15 00:02:05,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:07,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:07,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:07,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:07,555 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:07,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:02:07,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:07,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:02:07,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:07,555 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:07,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:02:07,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:07,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-15 00:02:07,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:07,570 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:02:07,570 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1926084734] [2020-10-15 00:02:07,571 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:07,571 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-10-15 00:02:07,571 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3389417] [2020-10-15 00:02:07,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-10-15 00:02:07,571 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:07,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-10-15 00:02:07,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1382, Invalid=1588, Unknown=0, NotChecked=0, Total=2970 [2020-10-15 00:02:07,572 INFO L87 Difference]: Start difference. First operand 113 states and 163 transitions. Second operand 55 states. [2020-10-15 00:02:11,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:11,005 INFO L93 Difference]: Finished difference Result 122 states and 174 transitions. [2020-10-15 00:02:11,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-15 00:02:11,011 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 112 [2020-10-15 00:02:11,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:11,012 INFO L225 Difference]: With dead ends: 122 [2020-10-15 00:02:11,012 INFO L226 Difference]: Without dead ends: 116 [2020-10-15 00:02:11,013 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1325 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=4242, Invalid=7100, Unknown=0, NotChecked=0, Total=11342 [2020-10-15 00:02:11,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-15 00:02:11,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2020-10-15 00:02:11,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-15 00:02:11,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 166 transitions. [2020-10-15 00:02:11,018 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 166 transitions. Word has length 112 [2020-10-15 00:02:11,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:11,018 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 166 transitions. [2020-10-15 00:02:11,019 INFO L480 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-10-15 00:02:11,019 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 166 transitions. [2020-10-15 00:02:11,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-15 00:02:11,020 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:11,020 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:11,020 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-15 00:02:11,021 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:11,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:11,021 INFO L82 PathProgramCache]: Analyzing trace with hash -1252150059, now seen corresponding path program 51 times [2020-10-15 00:02:11,023 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:11,023 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2037224581] [2020-10-15 00:02:11,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:11,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:11,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:11,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:13,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:13,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-15 00:02:13,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:02:13,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2000 [2020-10-15 00:02:13,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:13,051 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:13,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 54 [2020-10-15 00:02:13,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-15 00:02:13,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-15 00:02:13,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:15,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:15,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:15,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:15,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:15,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:02:15,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:15,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:02:15,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:15,507 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:15,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:02:15,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:15,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-15 00:02:15,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:15,521 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:02:15,522 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2037224581] [2020-10-15 00:02:15,522 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:15,522 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-10-15 00:02:15,522 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380069450] [2020-10-15 00:02:15,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-10-15 00:02:15,522 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:15,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-10-15 00:02:15,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1435, Invalid=1645, Unknown=0, NotChecked=0, Total=3080 [2020-10-15 00:02:15,523 INFO L87 Difference]: Start difference. First operand 115 states and 166 transitions. Second operand 56 states. [2020-10-15 00:02:19,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:19,472 INFO L93 Difference]: Finished difference Result 124 states and 177 transitions. [2020-10-15 00:02:19,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-15 00:02:19,473 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 114 [2020-10-15 00:02:19,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:19,474 INFO L225 Difference]: With dead ends: 124 [2020-10-15 00:02:19,475 INFO L226 Difference]: Without dead ends: 118 [2020-10-15 00:02:19,476 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1377 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=4403, Invalid=7369, Unknown=0, NotChecked=0, Total=11772 [2020-10-15 00:02:19,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-15 00:02:19,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 117. [2020-10-15 00:02:19,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-15 00:02:19,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 169 transitions. [2020-10-15 00:02:19,480 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 169 transitions. Word has length 114 [2020-10-15 00:02:19,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:19,480 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 169 transitions. [2020-10-15 00:02:19,480 INFO L480 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-10-15 00:02:19,480 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 169 transitions. [2020-10-15 00:02:19,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-15 00:02:19,481 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:19,481 INFO L422 BasicCegarLoop]: trace histogram [52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:19,481 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-15 00:02:19,482 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:19,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:19,482 INFO L82 PathProgramCache]: Analyzing trace with hash -48145448, now seen corresponding path program 52 times [2020-10-15 00:02:19,482 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:19,482 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [294251985] [2020-10-15 00:02:19,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:19,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:19,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:20,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:21,580 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:21,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-15 00:02:21,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:02:21,581 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2073 [2020-10-15 00:02:21,581 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:21,581 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:21,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 55 [2020-10-15 00:02:21,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-15 00:02:21,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-15 00:02:21,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:24,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:24,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:24,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:24,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:24,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:02:24,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:24,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:02:24,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:24,244 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:24,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:02:24,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:24,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-15 00:02:24,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:24,260 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:02:24,261 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [294251985] [2020-10-15 00:02:24,261 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:24,261 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2020-10-15 00:02:24,261 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082765457] [2020-10-15 00:02:24,261 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-10-15 00:02:24,261 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:24,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-10-15 00:02:24,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1489, Invalid=1703, Unknown=0, NotChecked=0, Total=3192 [2020-10-15 00:02:24,262 INFO L87 Difference]: Start difference. First operand 117 states and 169 transitions. Second operand 57 states. [2020-10-15 00:02:28,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:28,393 INFO L93 Difference]: Finished difference Result 126 states and 180 transitions. [2020-10-15 00:02:28,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-10-15 00:02:28,394 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 116 [2020-10-15 00:02:28,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:28,396 INFO L225 Difference]: With dead ends: 126 [2020-10-15 00:02:28,396 INFO L226 Difference]: Without dead ends: 120 [2020-10-15 00:02:28,397 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1430 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=4567, Invalid=7643, Unknown=0, NotChecked=0, Total=12210 [2020-10-15 00:02:28,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-15 00:02:28,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2020-10-15 00:02:28,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-15 00:02:28,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 172 transitions. [2020-10-15 00:02:28,408 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 172 transitions. Word has length 116 [2020-10-15 00:02:28,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:28,409 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 172 transitions. [2020-10-15 00:02:28,409 INFO L480 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-10-15 00:02:28,409 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 172 transitions. [2020-10-15 00:02:28,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-10-15 00:02:28,410 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:28,410 INFO L422 BasicCegarLoop]: trace histogram [53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:28,412 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-15 00:02:28,412 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:28,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:28,412 INFO L82 PathProgramCache]: Analyzing trace with hash 1654083099, now seen corresponding path program 53 times [2020-10-15 00:02:28,412 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:28,412 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [730015440] [2020-10-15 00:02:28,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:28,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:28,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:29,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:30,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:30,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-10-15 00:02:30,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:02:30,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2053 [2020-10-15 00:02:30,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:30,489 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:30,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 56 [2020-10-15 00:02:30,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-15 00:02:30,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-10-15 00:02:30,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:33,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:33,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:33,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:33,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:33,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:02:33,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:33,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:02:33,220 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:33,220 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:33,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:02:33,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:33,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-15 00:02:33,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:33,237 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:02:33,237 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [730015440] [2020-10-15 00:02:33,237 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:33,237 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-10-15 00:02:33,238 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004805689] [2020-10-15 00:02:33,238 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-10-15 00:02:33,238 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:33,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-10-15 00:02:33,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1544, Invalid=1762, Unknown=0, NotChecked=0, Total=3306 [2020-10-15 00:02:33,239 INFO L87 Difference]: Start difference. First operand 119 states and 172 transitions. Second operand 58 states. [2020-10-15 00:02:37,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:37,645 INFO L93 Difference]: Finished difference Result 128 states and 183 transitions. [2020-10-15 00:02:37,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-10-15 00:02:37,646 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 118 [2020-10-15 00:02:37,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:37,647 INFO L225 Difference]: With dead ends: 128 [2020-10-15 00:02:37,647 INFO L226 Difference]: Without dead ends: 122 [2020-10-15 00:02:37,648 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1484 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=4734, Invalid=7922, Unknown=0, NotChecked=0, Total=12656 [2020-10-15 00:02:37,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-15 00:02:37,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2020-10-15 00:02:37,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-15 00:02:37,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 175 transitions. [2020-10-15 00:02:37,654 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 175 transitions. Word has length 118 [2020-10-15 00:02:37,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:37,654 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 175 transitions. [2020-10-15 00:02:37,654 INFO L480 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-10-15 00:02:37,654 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 175 transitions. [2020-10-15 00:02:37,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-10-15 00:02:37,657 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:37,658 INFO L422 BasicCegarLoop]: trace histogram [54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:37,658 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-15 00:02:37,658 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:37,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:37,658 INFO L82 PathProgramCache]: Analyzing trace with hash 1113176990, now seen corresponding path program 54 times [2020-10-15 00:02:37,658 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:37,659 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1518759803] [2020-10-15 00:02:37,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:37,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:37,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:38,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:41,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:41,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-10-15 00:02:41,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:02:41,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3348 [2020-10-15 00:02:41,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:41,037 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:41,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 57 [2020-10-15 00:02:41,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-15 00:02:41,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 116 [2020-10-15 00:02:41,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:43,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:43,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:43,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:43,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:43,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:02:43,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:43,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:02:43,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:43,875 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:43,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:02:43,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:43,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-15 00:02:43,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:43,892 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:02:43,892 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1518759803] [2020-10-15 00:02:43,892 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:43,893 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2020-10-15 00:02:43,893 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510351331] [2020-10-15 00:02:43,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-10-15 00:02:43,894 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:43,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-10-15 00:02:43,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1600, Invalid=1822, Unknown=0, NotChecked=0, Total=3422 [2020-10-15 00:02:43,895 INFO L87 Difference]: Start difference. First operand 121 states and 175 transitions. Second operand 59 states. [2020-10-15 00:02:48,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:48,434 INFO L93 Difference]: Finished difference Result 130 states and 186 transitions. [2020-10-15 00:02:48,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-10-15 00:02:48,435 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 120 [2020-10-15 00:02:48,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:48,436 INFO L225 Difference]: With dead ends: 130 [2020-10-15 00:02:48,436 INFO L226 Difference]: Without dead ends: 124 [2020-10-15 00:02:48,437 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1539 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=4904, Invalid=8206, Unknown=0, NotChecked=0, Total=13110 [2020-10-15 00:02:48,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-15 00:02:48,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 123. [2020-10-15 00:02:48,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-15 00:02:48,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 178 transitions. [2020-10-15 00:02:48,442 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 178 transitions. Word has length 120 [2020-10-15 00:02:48,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:48,442 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 178 transitions. [2020-10-15 00:02:48,443 INFO L480 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-10-15 00:02:48,443 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 178 transitions. [2020-10-15 00:02:48,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-15 00:02:48,443 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:48,444 INFO L422 BasicCegarLoop]: trace histogram [55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:48,444 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-15 00:02:48,444 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:48,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:48,444 INFO L82 PathProgramCache]: Analyzing trace with hash 993449057, now seen corresponding path program 55 times [2020-10-15 00:02:48,444 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:48,445 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [808957172] [2020-10-15 00:02:48,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:48,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:48,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:49,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:50,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:50,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-15 00:02:50,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:02:50,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2422 [2020-10-15 00:02:50,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:50,884 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:50,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 58 [2020-10-15 00:02:50,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-15 00:02:50,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 118 [2020-10-15 00:02:50,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:53,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:53,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:53,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:53,840 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:53,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:02:53,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:53,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:02:53,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:53,841 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:53,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:02:53,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:53,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-15 00:02:53,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:02:53,861 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:02:53,861 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [808957172] [2020-10-15 00:02:53,861 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:53,861 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2020-10-15 00:02:53,861 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063960426] [2020-10-15 00:02:53,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-10-15 00:02:53,862 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:53,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-10-15 00:02:53,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1657, Invalid=1883, Unknown=0, NotChecked=0, Total=3540 [2020-10-15 00:02:53,863 INFO L87 Difference]: Start difference. First operand 123 states and 178 transitions. Second operand 60 states. [2020-10-15 00:02:58,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:58,591 INFO L93 Difference]: Finished difference Result 132 states and 189 transitions. [2020-10-15 00:02:58,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-10-15 00:02:58,592 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 122 [2020-10-15 00:02:58,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:58,593 INFO L225 Difference]: With dead ends: 132 [2020-10-15 00:02:58,593 INFO L226 Difference]: Without dead ends: 126 [2020-10-15 00:02:58,594 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1595 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=5077, Invalid=8495, Unknown=0, NotChecked=0, Total=13572 [2020-10-15 00:02:58,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-15 00:02:58,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 125. [2020-10-15 00:02:58,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-15 00:02:58,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 181 transitions. [2020-10-15 00:02:58,599 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 181 transitions. Word has length 122 [2020-10-15 00:02:58,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:58,600 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 181 transitions. [2020-10-15 00:02:58,600 INFO L480 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-10-15 00:02:58,600 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 181 transitions. [2020-10-15 00:02:58,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-10-15 00:02:58,601 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:58,601 INFO L422 BasicCegarLoop]: trace histogram [56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:58,601 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-15 00:02:58,601 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:58,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:58,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1899022436, now seen corresponding path program 56 times [2020-10-15 00:02:58,602 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:58,602 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1737345639] [2020-10-15 00:02:58,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:58,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:58,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:59,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:01,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:01,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-15 00:03:01,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:03:01,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2691 [2020-10-15 00:03:01,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:01,318 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:01,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 59 [2020-10-15 00:03:01,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-15 00:03:01,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 120 [2020-10-15 00:03:01,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:04,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:03:04,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:04,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:04,343 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:04,343 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:03:04,343 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:03:04,343 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:03:04,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:04,344 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:04,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:03:04,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:03:04,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-15 00:03:04,344 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:04,362 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:03:04,362 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1737345639] [2020-10-15 00:03:04,362 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:03:04,362 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2020-10-15 00:03:04,362 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674114786] [2020-10-15 00:03:04,363 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-10-15 00:03:04,363 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:03:04,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-10-15 00:03:04,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1715, Invalid=1945, Unknown=0, NotChecked=0, Total=3660 [2020-10-15 00:03:04,364 INFO L87 Difference]: Start difference. First operand 125 states and 181 transitions. Second operand 61 states. [2020-10-15 00:03:09,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:03:09,281 INFO L93 Difference]: Finished difference Result 134 states and 192 transitions. [2020-10-15 00:03:09,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-10-15 00:03:09,282 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 124 [2020-10-15 00:03:09,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:03:09,284 INFO L225 Difference]: With dead ends: 134 [2020-10-15 00:03:09,284 INFO L226 Difference]: Without dead ends: 128 [2020-10-15 00:03:09,286 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1652 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=5253, Invalid=8789, Unknown=0, NotChecked=0, Total=14042 [2020-10-15 00:03:09,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-15 00:03:09,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2020-10-15 00:03:09,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-15 00:03:09,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 184 transitions. [2020-10-15 00:03:09,291 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 184 transitions. Word has length 124 [2020-10-15 00:03:09,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:03:09,291 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 184 transitions. [2020-10-15 00:03:09,291 INFO L480 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-10-15 00:03:09,291 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 184 transitions. [2020-10-15 00:03:09,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-15 00:03:09,292 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:03:09,292 INFO L422 BasicCegarLoop]: trace histogram [57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:03:09,293 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-15 00:03:09,293 INFO L427 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:03:09,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:03:09,293 INFO L82 PathProgramCache]: Analyzing trace with hash 276678567, now seen corresponding path program 57 times [2020-10-15 00:03:09,293 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:03:09,293 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1341743574] [2020-10-15 00:03:09,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:03:09,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:09,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:10,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:12,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:12,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-15 00:03:12,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:03:12,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3432 [2020-10-15 00:03:12,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:12,752 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:12,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 60 [2020-10-15 00:03:12,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-15 00:03:12,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 122 [2020-10-15 00:03:12,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:15,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:03:15,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:15,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:15,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:15,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:03:15,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:03:15,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:03:15,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:15,958 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:15,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:03:15,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:03:15,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-15 00:03:15,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:15,975 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:03:15,976 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1341743574] [2020-10-15 00:03:15,976 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:03:15,976 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2020-10-15 00:03:15,976 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659455575] [2020-10-15 00:03:15,976 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-10-15 00:03:15,977 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:03:15,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-10-15 00:03:15,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1774, Invalid=2008, Unknown=0, NotChecked=0, Total=3782 [2020-10-15 00:03:15,977 INFO L87 Difference]: Start difference. First operand 127 states and 184 transitions. Second operand 62 states. [2020-10-15 00:03:21,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:03:21,256 INFO L93 Difference]: Finished difference Result 136 states and 195 transitions. [2020-10-15 00:03:21,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-10-15 00:03:21,257 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 126 [2020-10-15 00:03:21,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:03:21,258 INFO L225 Difference]: With dead ends: 136 [2020-10-15 00:03:21,259 INFO L226 Difference]: Without dead ends: 130 [2020-10-15 00:03:21,261 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1710 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=5432, Invalid=9088, Unknown=0, NotChecked=0, Total=14520 [2020-10-15 00:03:21,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-15 00:03:21,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 129. [2020-10-15 00:03:21,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-15 00:03:21,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 187 transitions. [2020-10-15 00:03:21,265 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 187 transitions. Word has length 126 [2020-10-15 00:03:21,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:03:21,266 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 187 transitions. [2020-10-15 00:03:21,266 INFO L480 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-10-15 00:03:21,266 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 187 transitions. [2020-10-15 00:03:21,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-10-15 00:03:21,266 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:03:21,266 INFO L422 BasicCegarLoop]: trace histogram [58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:03:21,266 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-15 00:03:21,267 INFO L427 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:03:21,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:03:21,267 INFO L82 PathProgramCache]: Analyzing trace with hash 277348906, now seen corresponding path program 58 times [2020-10-15 00:03:21,267 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:03:21,267 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [549637372] [2020-10-15 00:03:21,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:03:21,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:21,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:22,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:23,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:23,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-10-15 00:03:23,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:03:23,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2077 [2020-10-15 00:03:23,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:23,362 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:23,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 61 [2020-10-15 00:03:23,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-15 00:03:23,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-10-15 00:03:23,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:26,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:03:26,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:03:26,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:03:26,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:03:26,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 00:03:26,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:03:26,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:03:26,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:03:26,809 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:03:26,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:03:26,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:03:26,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-15 00:03:26,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:03:26,827 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:03:26,827 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [549637372] [2020-10-15 00:03:26,827 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:03:26,827 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2020-10-15 00:03:26,827 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067692898] [2020-10-15 00:03:26,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-10-15 00:03:26,828 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:03:26,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-10-15 00:03:26,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1834, Invalid=2072, Unknown=0, NotChecked=0, Total=3906 [2020-10-15 00:03:26,828 INFO L87 Difference]: Start difference. First operand 129 states and 187 transitions. Second operand 63 states.