/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/array-fpi/brs2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 18:08:02,756 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 18:08:02,758 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 18:08:02,782 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 18:08:02,782 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 18:08:02,783 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 18:08:02,784 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 18:08:02,786 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 18:08:02,787 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 18:08:02,788 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 18:08:02,789 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 18:08:02,790 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 18:08:02,790 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 18:08:02,791 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 18:08:02,795 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 18:08:02,796 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 18:08:02,797 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 18:08:02,799 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 18:08:02,804 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 18:08:02,805 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 18:08:02,809 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 18:08:02,811 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 18:08:02,812 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 18:08:02,813 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 18:08:02,816 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 18:08:02,816 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 18:08:02,816 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 18:08:02,818 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 18:08:02,819 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 18:08:02,820 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 18:08:02,820 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 18:08:02,822 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 18:08:02,823 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 18:08:02,823 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 18:08:02,824 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 18:08:02,824 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 18:08:02,832 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 18:08:02,832 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 18:08:02,833 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 18:08:02,833 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 18:08:02,836 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 18:08:02,838 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 18:08:02,878 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 18:08:02,878 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 18:08:02,879 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 18:08:02,880 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 18:08:02,880 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 18:08:02,880 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 18:08:02,880 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 18:08:02,881 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 18:08:02,881 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 18:08:02,881 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 18:08:02,882 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 18:08:02,882 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 18:08:02,882 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 18:08:02,883 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 18:08:02,883 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 18:08:02,883 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 18:08:02,883 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 18:08:02,883 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 18:08:02,884 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 18:08:02,884 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 18:08:02,884 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 18:08:02,884 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 18:08:02,884 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 18:08:02,884 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 18:08:02,885 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 18:08:02,885 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 18:08:02,885 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 18:08:02,885 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 18:08:02,885 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 18:08:02,886 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 18:08:03,207 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 18:08:03,223 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 18:08:03,226 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 18:08:03,228 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 18:08:03,228 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 18:08:03,229 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/brs2.c [2020-10-14 18:08:03,276 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9470136a6/f8b4d3b6d62e469697fc3587f4fbcea7/FLAG5683d4253 [2020-10-14 18:08:03,721 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 18:08:03,721 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/brs2.c [2020-10-14 18:08:03,727 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9470136a6/f8b4d3b6d62e469697fc3587f4fbcea7/FLAG5683d4253 [2020-10-14 18:08:04,121 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9470136a6/f8b4d3b6d62e469697fc3587f4fbcea7 [2020-10-14 18:08:04,130 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 18:08:04,132 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 18:08:04,133 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 18:08:04,133 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 18:08:04,136 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 18:08:04,137 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 06:08:04" (1/1) ... [2020-10-14 18:08:04,140 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4366909b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:08:04, skipping insertion in model container [2020-10-14 18:08:04,140 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 06:08:04" (1/1) ... [2020-10-14 18:08:04,148 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 18:08:04,164 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 18:08:04,333 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 18:08:04,341 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 18:08:04,362 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 18:08:04,381 INFO L208 MainTranslator]: Completed translation [2020-10-14 18:08:04,381 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:08:04 WrapperNode [2020-10-14 18:08:04,382 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 18:08:04,382 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 18:08:04,383 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 18:08:04,383 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 18:08:04,482 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:08:04" (1/1) ... [2020-10-14 18:08:04,483 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:08:04" (1/1) ... [2020-10-14 18:08:04,491 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:08:04" (1/1) ... [2020-10-14 18:08:04,491 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:08:04" (1/1) ... [2020-10-14 18:08:04,499 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:08:04" (1/1) ... [2020-10-14 18:08:04,504 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:08:04" (1/1) ... [2020-10-14 18:08:04,506 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:08:04" (1/1) ... [2020-10-14 18:08:04,508 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 18:08:04,508 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 18:08:04,508 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 18:08:04,508 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 18:08:04,509 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:08:04" (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 18:08:04,574 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 18:08:04,574 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 18:08:04,574 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-14 18:08:04,574 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-14 18:08:04,574 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 18:08:04,574 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 18:08:04,575 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-14 18:08:04,575 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-14 18:08:04,575 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-14 18:08:04,575 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-14 18:08:04,575 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-14 18:08:04,575 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 18:08:04,575 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-14 18:08:04,576 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-14 18:08:04,576 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-14 18:08:04,576 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-14 18:08:04,576 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-14 18:08:04,576 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 18:08:04,576 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 18:08:04,831 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 18:08:04,832 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-14 18:08:04,836 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 06:08:04 BoogieIcfgContainer [2020-10-14 18:08:04,836 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 18:08:04,838 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 18:08:04,838 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 18:08:04,841 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 18:08:04,841 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 06:08:04" (1/3) ... [2020-10-14 18:08:04,842 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18d633d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 06:08:04, skipping insertion in model container [2020-10-14 18:08:04,843 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:08:04" (2/3) ... [2020-10-14 18:08:04,843 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18d633d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 06:08:04, skipping insertion in model container [2020-10-14 18:08:04,843 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 06:08:04" (3/3) ... [2020-10-14 18:08:04,845 INFO L109 eAbstractionObserver]: Analyzing ICFG brs2.c [2020-10-14 18:08:04,857 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 18:08:04,864 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 18:08:04,879 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 18:08:04,904 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 18:08:04,905 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 18:08:04,905 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 18:08:04,905 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 18:08:04,905 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 18:08:04,905 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 18:08:04,906 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 18:08:04,906 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 18:08:04,925 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-10-14 18:08:04,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-14 18:08:04,932 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:08:04,933 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:08:04,934 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:08:04,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:08:04,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1824292310, now seen corresponding path program 1 times [2020-10-14 18:08:04,965 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:08:04,966 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [152019941] [2020-10-14 18:08:04,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:08:05,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:05,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:05,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:05,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:05,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:05,459 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-14 18:08:05,459 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 18:08:05,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 373 [2020-10-14 18:08:05,464 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:05,465 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:05,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 18:08:05,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 18:08:05,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 18:08:05,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-14 18:08:05,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:08:05,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:05,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:05,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:05,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:08:05,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:08:05,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 18:08:05,551 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:05,551 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:05,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:08:05,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:08:05,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:08:05,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:08:05,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:08:05,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:05,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:05,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:05,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:05,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:08:05,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:08:05,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-14 18:08:05,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:05,572 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:05,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:08:05,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:08:05,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:08:05,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:08:05,580 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 18:08:05,581 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [152019941] [2020-10-14 18:08:05,583 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 18:08:05,584 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 18:08:05,585 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876035019] [2020-10-14 18:08:05,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 18:08:05,590 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:08:05,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 18:08:05,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 18:08:05,607 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2020-10-14 18:08:05,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:08:05,779 INFO L93 Difference]: Finished difference Result 62 states and 80 transitions. [2020-10-14 18:08:05,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 18:08:05,781 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-10-14 18:08:05,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:08:05,790 INFO L225 Difference]: With dead ends: 62 [2020-10-14 18:08:05,791 INFO L226 Difference]: Without dead ends: 28 [2020-10-14 18:08:05,794 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-14 18:08:05,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-14 18:08:05,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-14 18:08:05,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-14 18:08:05,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2020-10-14 18:08:05,838 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 21 [2020-10-14 18:08:05,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:08:05,838 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2020-10-14 18:08:05,838 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 18:08:05,839 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2020-10-14 18:08:05,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-14 18:08:05,840 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:08:05,840 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:08:05,841 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 18:08:05,841 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:08:05,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:08:05,842 INFO L82 PathProgramCache]: Analyzing trace with hash -395878216, now seen corresponding path program 1 times [2020-10-14 18:08:05,842 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:08:05,842 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1576705909] [2020-10-14 18:08:05,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:08:05,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:05,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:05,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:06,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:06,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:06,447 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-14 18:08:06,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 18:08:06,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 580 [2020-10-14 18:08:06,449 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:06,449 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:06,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 18:08:06,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 18:08:06,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-14 18:08:06,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-14 18:08:06,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:08:06,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:06,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:06,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:06,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:08:06,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:08:06,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-14 18:08:06,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:06,573 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:06,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:08:06,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:08:06,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:08:06,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:08:06,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:08:06,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:06,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:06,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:06,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:08:06,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:08:06,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 18:08:06,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:06,588 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:06,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:08:06,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:08:06,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:08:06,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:08:06,598 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 18:08:06,599 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1576705909] [2020-10-14 18:08:06,599 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 18:08:06,600 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-14 18:08:06,600 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905563787] [2020-10-14 18:08:06,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 18:08:06,605 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:08:06,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 18:08:06,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-14 18:08:06,608 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 8 states. [2020-10-14 18:08:06,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:08:06,845 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2020-10-14 18:08:06,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 18:08:06,846 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-10-14 18:08:06,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:08:06,848 INFO L225 Difference]: With dead ends: 37 [2020-10-14 18:08:06,848 INFO L226 Difference]: Without dead ends: 31 [2020-10-14 18:08:06,849 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-10-14 18:08:06,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-14 18:08:06,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2020-10-14 18:08:06,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-14 18:08:06,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2020-10-14 18:08:06,861 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 27 [2020-10-14 18:08:06,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:08:06,862 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2020-10-14 18:08:06,862 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 18:08:06,862 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2020-10-14 18:08:06,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-14 18:08:06,864 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:08:06,864 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:08:06,864 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 18:08:06,865 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:08:06,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:08:06,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1205224842, now seen corresponding path program 1 times [2020-10-14 18:08:06,866 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:08:06,866 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1567818152] [2020-10-14 18:08:06,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:08:06,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:06,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:06,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:07,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:07,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:07,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-14 18:08:07,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 18:08:07,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 508 [2020-10-14 18:08:07,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:07,393 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:07,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 18:08:07,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 18:08:07,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 18:08:07,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:08:07,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:08:07,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:07,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:07,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:07,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:08:07,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:08:07,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 18:08:07,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:07,534 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:07,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:08:07,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:08:07,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:08:07,535 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:08:07,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:08:07,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:07,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:07,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:07,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:08:07,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:08:07,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 18:08:07,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:07,545 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:07,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:08:07,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:08:07,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:08:07,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:08:07,550 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:08:07,550 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1567818152] [2020-10-14 18:08:07,550 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:08:07,551 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 18:08:07,551 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578124366] [2020-10-14 18:08:07,552 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 18:08:07,555 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:08:07,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 18:08:07,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-10-14 18:08:07,557 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 10 states. [2020-10-14 18:08:07,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:08:07,832 INFO L93 Difference]: Finished difference Result 61 states and 74 transitions. [2020-10-14 18:08:07,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 18:08:07,832 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-10-14 18:08:07,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:08:07,834 INFO L225 Difference]: With dead ends: 61 [2020-10-14 18:08:07,834 INFO L226 Difference]: Without dead ends: 42 [2020-10-14 18:08:07,834 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2020-10-14 18:08:07,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-14 18:08:07,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 37. [2020-10-14 18:08:07,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-14 18:08:07,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2020-10-14 18:08:07,843 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 27 [2020-10-14 18:08:07,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:08:07,844 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2020-10-14 18:08:07,844 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 18:08:07,844 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2020-10-14 18:08:07,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-14 18:08:07,845 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:08:07,845 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:08:07,845 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 18:08:07,846 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:08:07,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:08:07,846 INFO L82 PathProgramCache]: Analyzing trace with hash 1492634651, now seen corresponding path program 1 times [2020-10-14 18:08:07,846 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:08:07,847 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [683953592] [2020-10-14 18:08:07,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:08:07,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:07,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:08,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:08,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:08,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:08,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:08,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:08,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:08,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:09,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:09,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:09,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:09,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:09,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:09,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:10,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:10,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:10,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:10,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:11,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:11,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:11,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:12,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:12,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-14 18:08:12,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 21 [2020-10-14 18:08:12,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4287 [2020-10-14 18:08:12,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:12,153 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:12,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 18:08:12,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 18:08:12,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-14 18:08:12,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:08:12,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:08:12,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:12,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:12,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:12,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:08:12,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:08:12,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:08:12,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:12,371 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:12,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:08:12,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:08:12,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:08:12,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:08:12,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:08:12,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:12,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:12,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:12,378 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:08:12,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:08:12,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 18:08:12,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:12,379 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:12,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:08:12,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:08:12,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:08:12,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:08:12,386 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:08:12,386 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [683953592] [2020-10-14 18:08:12,387 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:08:12,387 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 18:08:12,387 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857206251] [2020-10-14 18:08:12,388 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 18:08:12,388 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:08:12,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 18:08:12,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-10-14 18:08:12,389 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand 13 states. [2020-10-14 18:08:12,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:08:12,866 INFO L93 Difference]: Finished difference Result 68 states and 83 transitions. [2020-10-14 18:08:12,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 18:08:12,866 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 33 [2020-10-14 18:08:12,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:08:12,867 INFO L225 Difference]: With dead ends: 68 [2020-10-14 18:08:12,868 INFO L226 Difference]: Without dead ends: 40 [2020-10-14 18:08:12,868 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2020-10-14 18:08:12,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-14 18:08:12,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2020-10-14 18:08:12,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-14 18:08:12,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2020-10-14 18:08:12,876 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 33 [2020-10-14 18:08:12,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:08:12,876 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2020-10-14 18:08:12,876 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 18:08:12,876 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2020-10-14 18:08:12,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-14 18:08:12,877 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:08:12,878 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:08:12,878 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 18:08:12,878 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:08:12,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:08:12,878 INFO L82 PathProgramCache]: Analyzing trace with hash -2145280396, now seen corresponding path program 2 times [2020-10-14 18:08:12,879 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:08:12,879 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [632213862] [2020-10-14 18:08:12,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:08:12,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:12,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:12,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:12,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:12,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:13,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:13,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:13,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:13,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:13,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:13,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:14,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:17,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:17,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:17,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-14 18:08:17,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-14 18:08:17,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-14 18:08:17,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:17,920 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:17,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 18:08:17,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 18:08:17,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-14 18:08:17,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:08:18,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:08:18,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:18,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:18,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:18,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:08:18,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:08:18,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:08:18,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:18,167 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:18,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:08:18,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:08:18,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:08:18,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:08:18,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:08:18,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:18,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:18,176 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:18,176 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:08:18,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:08:18,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 18:08:18,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:18,178 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:18,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:08:18,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:08:18,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:08:18,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:08:18,186 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 18:08:18,187 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [632213862] [2020-10-14 18:08:18,187 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:08:18,187 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 18:08:18,188 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66764537] [2020-10-14 18:08:18,189 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 18:08:18,189 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:08:18,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 18:08:18,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-10-14 18:08:18,190 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand 13 states. [2020-10-14 18:08:18,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:08:18,866 INFO L93 Difference]: Finished difference Result 61 states and 68 transitions. [2020-10-14 18:08:18,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 18:08:18,867 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2020-10-14 18:08:18,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:08:18,869 INFO L225 Difference]: With dead ends: 61 [2020-10-14 18:08:18,869 INFO L226 Difference]: Without dead ends: 44 [2020-10-14 18:08:18,871 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2020-10-14 18:08:18,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-14 18:08:18,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 41. [2020-10-14 18:08:18,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-14 18:08:18,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2020-10-14 18:08:18,885 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 36 [2020-10-14 18:08:18,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:08:18,885 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2020-10-14 18:08:18,886 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 18:08:18,886 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2020-10-14 18:08:18,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-14 18:08:18,887 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:08:18,888 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:08:18,888 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 18:08:18,888 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:08:18,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:08:18,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1680039082, now seen corresponding path program 3 times [2020-10-14 18:08:18,889 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:08:18,890 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [9133175] [2020-10-14 18:08:18,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:08:18,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:18,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:19,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:19,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:19,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:19,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:19,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:19,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:20,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:20,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:20,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:21,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:21,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:21,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:21,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:21,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:21,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:23,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:23,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:23,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:23,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:23,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-14 18:08:23,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-14 18:08:23,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-14 18:08:23,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:23,915 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:23,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 18:08:23,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 18:08:23,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-14 18:08:23,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:08:24,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:08:24,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:24,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:24,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:24,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:08:24,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:08:24,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:08:24,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:24,360 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:24,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:08:24,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:08:24,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:08:24,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:08:24,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:08:24,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:24,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:24,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:24,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:08:24,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:08:24,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:08:24,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:24,367 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:24,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:08:24,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:08:24,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:08:24,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:08:24,381 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:08:24,382 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [9133175] [2020-10-14 18:08:24,382 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:08:24,382 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 18:08:24,382 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151883591] [2020-10-14 18:08:24,383 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 18:08:24,383 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:08:24,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 18:08:24,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2020-10-14 18:08:24,384 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 17 states. [2020-10-14 18:08:25,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:08:25,176 INFO L93 Difference]: Finished difference Result 73 states and 84 transitions. [2020-10-14 18:08:25,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-14 18:08:25,178 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 39 [2020-10-14 18:08:25,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:08:25,179 INFO L225 Difference]: With dead ends: 73 [2020-10-14 18:08:25,179 INFO L226 Difference]: Without dead ends: 46 [2020-10-14 18:08:25,180 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2020-10-14 18:08:25,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-14 18:08:25,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2020-10-14 18:08:25,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-14 18:08:25,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2020-10-14 18:08:25,189 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 39 [2020-10-14 18:08:25,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:08:25,190 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2020-10-14 18:08:25,190 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 18:08:25,190 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2020-10-14 18:08:25,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-14 18:08:25,192 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:08:25,192 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:08:25,192 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 18:08:25,193 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:08:25,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:08:25,193 INFO L82 PathProgramCache]: Analyzing trace with hash 76822873, now seen corresponding path program 4 times [2020-10-14 18:08:25,193 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:08:25,193 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2014415852] [2020-10-14 18:08:25,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:08:25,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:25,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:25,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:25,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:25,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:25,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:25,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:25,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:25,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:26,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:27,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:27,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:27,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:27,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:27,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:30,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:30,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-14 18:08:30,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-14 18:08:30,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 18:08:30,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:30,212 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:30,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 18:08:30,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 18:08:30,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-14 18:08:30,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:08:30,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:08:30,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:30,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:30,467 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:30,467 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:08:30,467 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:08:30,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:08:30,467 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:30,468 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:30,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:08:30,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:08:30,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:08:30,468 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:08:30,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:08:30,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:30,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:30,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:30,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:08:30,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:08:30,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:08:30,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:30,474 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:30,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:08:30,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:08:30,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:08:30,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:08:30,481 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 18:08:30,482 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2014415852] [2020-10-14 18:08:30,482 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:08:30,482 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 18:08:30,483 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928833988] [2020-10-14 18:08:30,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 18:08:30,484 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:08:30,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 18:08:30,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2020-10-14 18:08:30,485 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand 16 states. [2020-10-14 18:08:31,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:08:31,134 INFO L93 Difference]: Finished difference Result 70 states and 77 transitions. [2020-10-14 18:08:31,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-14 18:08:31,136 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 42 [2020-10-14 18:08:31,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:08:31,139 INFO L225 Difference]: With dead ends: 70 [2020-10-14 18:08:31,139 INFO L226 Difference]: Without dead ends: 50 [2020-10-14 18:08:31,142 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=244, Invalid=748, Unknown=0, NotChecked=0, Total=992 [2020-10-14 18:08:31,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-14 18:08:31,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2020-10-14 18:08:31,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-14 18:08:31,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2020-10-14 18:08:31,154 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 42 [2020-10-14 18:08:31,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:08:31,154 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2020-10-14 18:08:31,154 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 18:08:31,155 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2020-10-14 18:08:31,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-14 18:08:31,158 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:08:31,160 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:08:31,160 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 18:08:31,160 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:08:31,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:08:31,161 INFO L82 PathProgramCache]: Analyzing trace with hash -2125987335, now seen corresponding path program 5 times [2020-10-14 18:08:31,161 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:08:31,161 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [727738581] [2020-10-14 18:08:31,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:08:31,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:31,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:31,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:31,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:31,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:31,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:31,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:31,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:32,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:32,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:33,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:33,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:33,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:33,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:34,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:34,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:34,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:35,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:35,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:36,191 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:36,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-14 18:08:36,192 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-14 18:08:36,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-14 18:08:36,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:36,193 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:36,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-14 18:08:36,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:08:36,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-14 18:08:36,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:08:37,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:08:37,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:37,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:37,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:37,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:08:37,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:08:37,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:08:37,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:37,156 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:37,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:08:37,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:08:37,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:08:37,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:08:37,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:08:37,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:37,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:37,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:37,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:08:37,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:08:37,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:08:37,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:37,161 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:37,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:08:37,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:08:37,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:08:37,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:08:37,176 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:08:37,177 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [727738581] [2020-10-14 18:08:37,177 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:08:37,177 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-14 18:08:37,177 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184970780] [2020-10-14 18:08:37,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-14 18:08:37,179 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:08:37,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-14 18:08:37,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2020-10-14 18:08:37,180 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 21 states. [2020-10-14 18:08:38,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:08:38,203 INFO L93 Difference]: Finished difference Result 82 states and 93 transitions. [2020-10-14 18:08:38,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 18:08:38,204 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 45 [2020-10-14 18:08:38,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:08:38,205 INFO L225 Difference]: With dead ends: 82 [2020-10-14 18:08:38,206 INFO L226 Difference]: Without dead ends: 52 [2020-10-14 18:08:38,207 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=123, Invalid=807, Unknown=0, NotChecked=0, Total=930 [2020-10-14 18:08:38,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-14 18:08:38,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2020-10-14 18:08:38,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-14 18:08:38,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2020-10-14 18:08:38,216 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 45 [2020-10-14 18:08:38,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:08:38,217 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2020-10-14 18:08:38,217 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-14 18:08:38,217 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2020-10-14 18:08:38,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-14 18:08:38,218 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:08:38,218 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:08:38,218 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 18:08:38,222 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:08:38,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:08:38,223 INFO L82 PathProgramCache]: Analyzing trace with hash -833735722, now seen corresponding path program 6 times [2020-10-14 18:08:38,223 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:08:38,223 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1409593509] [2020-10-14 18:08:38,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:08:38,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:38,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:38,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:38,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:38,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:38,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:38,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:38,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:38,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:39,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:39,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:39,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:39,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:39,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:39,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:39,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:40,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:40,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:43,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:43,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-14 18:08:43,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-14 18:08:43,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 18:08:43,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:43,239 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:43,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 18:08:43,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 18:08:43,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-14 18:08:43,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:08:43,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:08:43,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:43,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:43,527 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:43,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:08:43,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:08:43,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:08:43,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:43,528 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:43,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:08:43,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:08:43,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:08:43,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:08:43,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:08:43,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:43,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:43,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:43,531 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:08:43,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:08:43,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:08:43,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:43,532 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:43,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:08:43,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:08:43,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:08:43,532 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:08:43,539 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 4 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 18:08:43,539 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1409593509] [2020-10-14 18:08:43,539 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:08:43,539 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-14 18:08:43,540 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730315541] [2020-10-14 18:08:43,540 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-14 18:08:43,540 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:08:43,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-14 18:08:43,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2020-10-14 18:08:43,541 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand 19 states. [2020-10-14 18:08:44,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:08:44,339 INFO L93 Difference]: Finished difference Result 79 states and 86 transitions. [2020-10-14 18:08:44,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-14 18:08:44,340 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 48 [2020-10-14 18:08:44,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:08:44,342 INFO L225 Difference]: With dead ends: 79 [2020-10-14 18:08:44,342 INFO L226 Difference]: Without dead ends: 56 [2020-10-14 18:08:44,344 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=340, Invalid=1142, Unknown=0, NotChecked=0, Total=1482 [2020-10-14 18:08:44,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-14 18:08:44,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2020-10-14 18:08:44,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-14 18:08:44,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2020-10-14 18:08:44,350 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 48 [2020-10-14 18:08:44,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:08:44,351 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2020-10-14 18:08:44,351 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-14 18:08:44,351 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2020-10-14 18:08:44,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-14 18:08:44,352 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:08:44,352 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:08:44,352 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 18:08:44,352 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:08:44,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:08:44,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1634702732, now seen corresponding path program 7 times [2020-10-14 18:08:44,353 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:08:44,353 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [101663340] [2020-10-14 18:08:44,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:08:44,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:44,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:44,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:44,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:44,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:44,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:45,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:45,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:46,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:46,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:46,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:46,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:46,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:46,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:47,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:47,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:47,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:47,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:47,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:47,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:47,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:48,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:49,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:49,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:49,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-14 18:08:49,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 22 [2020-10-14 18:08:49,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-14 18:08:49,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:49,376 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:49,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-14 18:08:49,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:08:49,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-14 18:08:49,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:08:50,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:08:50,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:50,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:50,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:50,553 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:08:50,553 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:08:50,553 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:08:50,553 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:50,553 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:50,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:08:50,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:08:50,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:08:50,554 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:08:50,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:08:50,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:50,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:50,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:50,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:08:50,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:08:50,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:08:50,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:50,558 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:50,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:08:50,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:08:50,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:08:50,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:08:50,580 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 2 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:08:50,580 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [101663340] [2020-10-14 18:08:50,581 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:08:50,581 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-14 18:08:50,581 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074471889] [2020-10-14 18:08:50,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-14 18:08:50,582 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:08:50,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-14 18:08:50,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2020-10-14 18:08:50,583 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand 25 states. [2020-10-14 18:08:52,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:08:52,858 INFO L93 Difference]: Finished difference Result 121 states and 140 transitions. [2020-10-14 18:08:52,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-14 18:08:52,859 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 51 [2020-10-14 18:08:52,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:08:52,866 INFO L225 Difference]: With dead ends: 121 [2020-10-14 18:08:52,867 INFO L226 Difference]: Without dead ends: 88 [2020-10-14 18:08:52,870 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=173, Invalid=1633, Unknown=0, NotChecked=0, Total=1806 [2020-10-14 18:08:52,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-14 18:08:52,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 81. [2020-10-14 18:08:52,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-14 18:08:52,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 91 transitions. [2020-10-14 18:08:52,885 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 91 transitions. Word has length 51 [2020-10-14 18:08:52,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:08:52,885 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 91 transitions. [2020-10-14 18:08:52,885 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-14 18:08:52,885 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 91 transitions. [2020-10-14 18:08:52,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-14 18:08:52,886 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:08:52,886 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:08:52,886 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 18:08:52,887 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:08:52,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:08:52,887 INFO L82 PathProgramCache]: Analyzing trace with hash 2072294779, now seen corresponding path program 8 times [2020-10-14 18:08:52,887 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:08:52,887 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1916702870] [2020-10-14 18:08:52,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:08:52,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:52,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:52,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:53,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:53,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:53,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:53,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:53,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:53,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:53,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:53,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:53,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:53,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:53,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:53,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:53,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:54,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:54,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:54,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:54,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:54,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:57,902 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:57,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-14 18:08:57,902 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 20 [2020-10-14 18:08:57,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 18:08:57,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:57,903 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:57,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 18:08:57,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:08:57,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-14 18:08:57,903 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:08:58,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:08:58,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:58,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:58,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:58,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:08:58,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:08:58,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:08:58,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:58,156 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:58,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:08:58,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:08:58,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:08:58,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:08:58,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:08:58,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:58,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:58,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:58,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:08:58,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:08:58,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:08:58,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:58,159 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:58,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:08:58,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:08:58,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:08:58,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:08:58,165 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 18:08:58,165 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1916702870] [2020-10-14 18:08:58,165 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:08:58,165 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 18:08:58,166 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377245692] [2020-10-14 18:08:58,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 18:08:58,166 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:08:58,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 18:08:58,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2020-10-14 18:08:58,167 INFO L87 Difference]: Start difference. First operand 81 states and 91 transitions. Second operand 18 states. [2020-10-14 18:08:59,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:08:59,314 INFO L93 Difference]: Finished difference Result 183 states and 207 transitions. [2020-10-14 18:08:59,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-14 18:08:59,319 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 54 [2020-10-14 18:08:59,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:08:59,320 INFO L225 Difference]: With dead ends: 183 [2020-10-14 18:08:59,320 INFO L226 Difference]: Without dead ends: 125 [2020-10-14 18:08:59,322 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=236, Invalid=1170, Unknown=0, NotChecked=0, Total=1406 [2020-10-14 18:08:59,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-14 18:08:59,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 88. [2020-10-14 18:08:59,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-14 18:08:59,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 98 transitions. [2020-10-14 18:08:59,334 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 98 transitions. Word has length 54 [2020-10-14 18:08:59,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:08:59,334 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 98 transitions. [2020-10-14 18:08:59,334 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 18:08:59,335 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 98 transitions. [2020-10-14 18:08:59,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-14 18:08:59,336 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:08:59,336 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:08:59,336 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 18:08:59,336 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:08:59,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:08:59,337 INFO L82 PathProgramCache]: Analyzing trace with hash -264052456, now seen corresponding path program 9 times [2020-10-14 18:08:59,337 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:08:59,337 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [190401916] [2020-10-14 18:08:59,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:08:59,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:59,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:59,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:59,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:59,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:59,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:59,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:59,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:59,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:59,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:59,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:59,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:00,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:00,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:01,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:01,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:02,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:04,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:04,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-14 18:09:04,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-14 18:09:04,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 18:09:04,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:04,349 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:04,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 18:09:04,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:09:04,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-14 18:09:04,350 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:09:04,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:09:04,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:04,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:04,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:04,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:09:04,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:09:04,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:09:04,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:04,502 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:04,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:09:04,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:09:04,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:09:04,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:09:04,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:09:04,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:04,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:04,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:04,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:09:04,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:09:04,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:09:04,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:04,506 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:04,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:09:04,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:09:04,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:09:04,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:09:04,510 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 35 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:09:04,510 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [190401916] [2020-10-14 18:09:04,510 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:09:04,511 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 18:09:04,511 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966884904] [2020-10-14 18:09:04,511 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 18:09:04,511 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:09:04,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 18:09:04,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2020-10-14 18:09:04,512 INFO L87 Difference]: Start difference. First operand 88 states and 98 transitions. Second operand 16 states. [2020-10-14 18:09:04,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:09:04,931 INFO L93 Difference]: Finished difference Result 128 states and 142 transitions. [2020-10-14 18:09:04,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 18:09:04,931 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 54 [2020-10-14 18:09:04,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:09:04,932 INFO L225 Difference]: With dead ends: 128 [2020-10-14 18:09:04,932 INFO L226 Difference]: Without dead ends: 90 [2020-10-14 18:09:04,933 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=185, Invalid=571, Unknown=0, NotChecked=0, Total=756 [2020-10-14 18:09:04,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-14 18:09:04,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 70. [2020-10-14 18:09:04,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-14 18:09:04,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 77 transitions. [2020-10-14 18:09:04,949 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 77 transitions. Word has length 54 [2020-10-14 18:09:04,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:09:04,949 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 77 transitions. [2020-10-14 18:09:04,949 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 18:09:04,949 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 77 transitions. [2020-10-14 18:09:04,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-14 18:09:04,950 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:09:04,951 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:09:04,951 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 18:09:04,951 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:09:04,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:09:04,951 INFO L82 PathProgramCache]: Analyzing trace with hash -1434383273, now seen corresponding path program 10 times [2020-10-14 18:09:04,951 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:09:04,952 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1902231980] [2020-10-14 18:09:04,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:09:04,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:04,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:05,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:05,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:05,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:05,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:05,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:05,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:05,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:05,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:05,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:05,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:05,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:06,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:06,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:07,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:08,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:09,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:09,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:09,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:10,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:10,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-14 18:09:10,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-14 18:09:10,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5142 [2020-10-14 18:09:10,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:10,108 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:10,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-14 18:09:10,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:09:10,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-14 18:09:10,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:09:11,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:09:11,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:11,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:11,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:11,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:09:11,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:09:11,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:09:11,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:11,438 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:11,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:09:11,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:09:11,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:09:11,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:09:11,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:09:11,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:11,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:11,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:11,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:09:11,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:09:11,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:09:11,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:11,442 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:11,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:09:11,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:09:11,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:09:11,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:09:11,463 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 4 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:09:11,463 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1902231980] [2020-10-14 18:09:11,464 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:09:11,464 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-14 18:09:11,464 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425957502] [2020-10-14 18:09:11,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-14 18:09:11,464 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:09:11,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-14 18:09:11,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=747, Unknown=0, NotChecked=0, Total=812 [2020-10-14 18:09:11,465 INFO L87 Difference]: Start difference. First operand 70 states and 77 transitions. Second operand 29 states. [2020-10-14 18:09:14,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:09:14,024 INFO L93 Difference]: Finished difference Result 108 states and 118 transitions. [2020-10-14 18:09:14,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-14 18:09:14,025 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 57 [2020-10-14 18:09:14,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:09:14,026 INFO L225 Difference]: With dead ends: 108 [2020-10-14 18:09:14,026 INFO L226 Difference]: Without dead ends: 64 [2020-10-14 18:09:14,028 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=193, Invalid=1877, Unknown=0, NotChecked=0, Total=2070 [2020-10-14 18:09:14,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-14 18:09:14,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2020-10-14 18:09:14,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-14 18:09:14,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2020-10-14 18:09:14,035 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 57 [2020-10-14 18:09:14,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:09:14,036 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2020-10-14 18:09:14,036 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-14 18:09:14,036 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2020-10-14 18:09:14,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-14 18:09:14,037 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:09:14,037 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:09:14,037 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 18:09:14,037 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:09:14,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:09:14,038 INFO L82 PathProgramCache]: Analyzing trace with hash -215243592, now seen corresponding path program 11 times [2020-10-14 18:09:14,038 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:09:14,038 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [584465782] [2020-10-14 18:09:14,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:09:14,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:14,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:14,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:14,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:14,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:14,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:14,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:14,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:14,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:14,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:14,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:14,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:15,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:15,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:15,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:15,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:15,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:15,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:16,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:16,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:16,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:16,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:17,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:17,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:19,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:19,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-14 18:09:19,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 23 [2020-10-14 18:09:19,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 18:09:19,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:19,051 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:19,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 18:09:19,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:09:19,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-14 18:09:19,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:09:19,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:09:19,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:19,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:19,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:19,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:09:19,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:09:19,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:09:19,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:19,362 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:19,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:09:19,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:09:19,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:09:19,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:09:19,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:09:19,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:19,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:19,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:19,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:09:19,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:09:19,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:09:19,365 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:19,365 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:19,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:09:19,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:09:19,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:09:19,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:09:19,371 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 18:09:19,371 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [584465782] [2020-10-14 18:09:19,371 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:09:19,371 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-14 18:09:19,372 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263431689] [2020-10-14 18:09:19,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-14 18:09:19,372 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:09:19,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-14 18:09:19,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2020-10-14 18:09:19,372 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand 20 states. [2020-10-14 18:09:20,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:09:20,572 INFO L93 Difference]: Finished difference Result 99 states and 103 transitions. [2020-10-14 18:09:20,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-14 18:09:20,573 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 60 [2020-10-14 18:09:20,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:09:20,574 INFO L225 Difference]: With dead ends: 99 [2020-10-14 18:09:20,574 INFO L226 Difference]: Without dead ends: 69 [2020-10-14 18:09:20,576 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=213, Invalid=1119, Unknown=0, NotChecked=0, Total=1332 [2020-10-14 18:09:20,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-14 18:09:20,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 65. [2020-10-14 18:09:20,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-14 18:09:20,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 68 transitions. [2020-10-14 18:09:20,583 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 68 transitions. Word has length 60 [2020-10-14 18:09:20,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:09:20,583 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 68 transitions. [2020-10-14 18:09:20,583 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-14 18:09:20,583 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 68 transitions. [2020-10-14 18:09:20,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-14 18:09:20,584 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:09:20,584 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:09:20,584 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 18:09:20,584 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:09:20,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:09:20,585 INFO L82 PathProgramCache]: Analyzing trace with hash -1726425582, now seen corresponding path program 12 times [2020-10-14 18:09:20,585 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:09:20,585 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1562341352] [2020-10-14 18:09:20,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:09:20,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:20,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:20,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:21,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:21,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:21,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:21,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:22,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:22,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:24,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:25,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:25,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:25,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-14 18:09:25,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-14 18:09:25,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5178 [2020-10-14 18:09:25,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:25,782 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:25,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-14 18:09:25,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:09:25,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-14 18:09:25,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 18:09:27,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:09:27,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:27,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:27,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:27,679 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:09:27,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:09:27,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:09:27,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:27,679 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:27,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:09:27,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:09:27,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:09:27,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:09:27,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:09:27,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:27,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:27,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:27,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:09:27,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:09:27,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:09:27,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:27,682 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:27,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:09:27,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:09:27,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:09:27,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:09:27,708 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:09:27,708 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1562341352] [2020-10-14 18:09:27,709 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:09:27,709 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-14 18:09:27,709 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124447503] [2020-10-14 18:09:27,709 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-14 18:09:27,709 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:09:27,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-14 18:09:27,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=983, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 18:09:27,710 INFO L87 Difference]: Start difference. First operand 65 states and 68 transitions. Second operand 33 states. [2020-10-14 18:09:30,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:09:30,665 INFO L93 Difference]: Finished difference Result 137 states and 147 transitions. [2020-10-14 18:09:30,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-14 18:09:30,665 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 63 [2020-10-14 18:09:30,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:09:30,666 INFO L225 Difference]: With dead ends: 137 [2020-10-14 18:09:30,667 INFO L226 Difference]: Without dead ends: 98 [2020-10-14 18:09:30,669 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=170, Invalid=2380, Unknown=0, NotChecked=0, Total=2550 [2020-10-14 18:09:30,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-14 18:09:30,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 74. [2020-10-14 18:09:30,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-14 18:09:30,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 78 transitions. [2020-10-14 18:09:30,677 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 78 transitions. Word has length 63 [2020-10-14 18:09:30,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:09:30,678 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 78 transitions. [2020-10-14 18:09:30,678 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-14 18:09:30,678 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 78 transitions. [2020-10-14 18:09:30,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-14 18:09:30,678 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:09:30,678 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:09:30,679 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 18:09:30,679 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:09:30,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:09:30,679 INFO L82 PathProgramCache]: Analyzing trace with hash 1156070685, now seen corresponding path program 13 times [2020-10-14 18:09:30,679 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:09:30,680 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1745610246] [2020-10-14 18:09:30,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:09:30,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:30,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:30,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:30,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:31,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:31,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:31,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:31,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:32,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:32,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:32,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:32,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:32,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:32,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:32,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:32,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:33,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:33,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:34,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:35,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:35,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:35,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:35,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:35,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-14 18:09:35,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 21 [2020-10-14 18:09:35,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-14 18:09:35,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:35,700 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:35,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 18:09:35,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:09:35,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-14 18:09:35,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:09:35,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:09:35,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:35,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:35,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:35,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:09:35,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:09:35,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:09:35,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:35,941 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:35,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:09:35,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:09:35,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:09:35,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:09:35,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:09:35,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:35,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:35,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:35,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:09:35,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:09:35,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:09:35,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:35,948 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:35,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:09:35,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:09:35,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:09:35,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:09:35,960 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 92 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:09:35,961 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1745610246] [2020-10-14 18:09:35,965 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:09:35,965 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-14 18:09:35,965 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000172805] [2020-10-14 18:09:35,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-14 18:09:35,966 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:09:35,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-14 18:09:35,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2020-10-14 18:09:35,967 INFO L87 Difference]: Start difference. First operand 74 states and 78 transitions. Second operand 20 states. [2020-10-14 18:09:36,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:09:36,569 INFO L93 Difference]: Finished difference Result 112 states and 116 transitions. [2020-10-14 18:09:36,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 18:09:36,570 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 66 [2020-10-14 18:09:36,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:09:36,572 INFO L225 Difference]: With dead ends: 112 [2020-10-14 18:09:36,572 INFO L226 Difference]: Without dead ends: 80 [2020-10-14 18:09:36,573 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=193, Invalid=619, Unknown=0, NotChecked=0, Total=812 [2020-10-14 18:09:36,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-14 18:09:36,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 68. [2020-10-14 18:09:36,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-14 18:09:36,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 71 transitions. [2020-10-14 18:09:36,589 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 71 transitions. Word has length 66 [2020-10-14 18:09:36,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:09:36,590 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 71 transitions. [2020-10-14 18:09:36,590 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-14 18:09:36,590 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 71 transitions. [2020-10-14 18:09:36,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-14 18:09:36,592 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:09:36,592 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 6, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:09:36,592 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 18:09:36,592 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:09:36,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:09:36,593 INFO L82 PathProgramCache]: Analyzing trace with hash -800293126, now seen corresponding path program 14 times [2020-10-14 18:09:36,593 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:09:36,594 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [986847165] [2020-10-14 18:09:36,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:09:36,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:36,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:36,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:36,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:37,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:37,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:37,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:37,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:37,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:37,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:37,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:37,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:37,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:37,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:38,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:38,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:38,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:38,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:38,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:38,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:38,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:41,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:41,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-14 18:09:41,618 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 20 [2020-10-14 18:09:41,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 18:09:41,618 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:41,618 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:41,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 18:09:41,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:09:41,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-14 18:09:41,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:09:41,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:09:41,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:41,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:41,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:41,844 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:09:41,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:09:41,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:09:41,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:41,850 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:41,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:09:41,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:09:41,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:09:41,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:09:41,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:09:41,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:41,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:41,857 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:41,858 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:09:41,858 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:09:41,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:09:41,858 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:41,859 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:41,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:09:41,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:09:41,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:09:41,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:09:41,870 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 70 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:09:41,870 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [986847165] [2020-10-14 18:09:41,870 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:09:41,871 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-14 18:09:41,871 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078275546] [2020-10-14 18:09:41,872 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-14 18:09:41,873 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:09:41,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-14 18:09:41,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2020-10-14 18:09:41,874 INFO L87 Difference]: Start difference. First operand 68 states and 71 transitions. Second operand 20 states. [2020-10-14 18:09:42,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:09:42,602 INFO L93 Difference]: Finished difference Result 79 states and 82 transitions. [2020-10-14 18:09:42,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-14 18:09:42,602 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 66 [2020-10-14 18:09:42,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:09:42,604 INFO L225 Difference]: With dead ends: 79 [2020-10-14 18:09:42,604 INFO L226 Difference]: Without dead ends: 73 [2020-10-14 18:09:42,605 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=300, Invalid=960, Unknown=0, NotChecked=0, Total=1260 [2020-10-14 18:09:42,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-14 18:09:42,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2020-10-14 18:09:42,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-14 18:09:42,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 74 transitions. [2020-10-14 18:09:42,612 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 74 transitions. Word has length 66 [2020-10-14 18:09:42,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:09:42,613 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 74 transitions. [2020-10-14 18:09:42,613 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-14 18:09:42,613 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 74 transitions. [2020-10-14 18:09:42,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-14 18:09:42,614 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:09:42,614 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:09:42,614 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 18:09:42,614 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:09:42,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:09:42,615 INFO L82 PathProgramCache]: Analyzing trace with hash 698157877, now seen corresponding path program 15 times [2020-10-14 18:09:42,615 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:09:42,615 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1199702515] [2020-10-14 18:09:42,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:09:42,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:42,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:43,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:43,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:44,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:45,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:45,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:46,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:46,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:47,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:47,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:47,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-14 18:09:47,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-14 18:09:47,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-14 18:09:47,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:47,665 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:47,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-14 18:09:47,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 18:09:47,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-14 18:09:47,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:09:48,375 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 37 [2020-10-14 18:09:48,519 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 40 [2020-10-14 18:09:48,950 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2020-10-14 18:09:49,177 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 46 [2020-10-14 18:09:49,409 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 47 [2020-10-14 18:09:49,648 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 50 [2020-10-14 18:09:50,271 WARN L193 SmtUtils]: Spent 441.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 80 [2020-10-14 18:09:50,858 WARN L193 SmtUtils]: Spent 518.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 94 [2020-10-14 18:09:51,423 WARN L193 SmtUtils]: Spent 481.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 117 [2020-10-14 18:09:52,040 WARN L193 SmtUtils]: Spent 524.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 102 [2020-10-14 18:09:52,857 WARN L193 SmtUtils]: Spent 720.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 104 [2020-10-14 18:09:53,243 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 89 [2020-10-14 18:09:53,738 WARN L193 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 96 [2020-10-14 18:09:54,032 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 75 [2020-10-14 18:09:54,349 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 69 [2020-10-14 18:09:54,572 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2020-10-14 18:09:54,821 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 64 [2020-10-14 18:09:55,182 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 36 [2020-10-14 18:09:55,366 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 35 [2020-10-14 18:09:55,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:09:55,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:55,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:55,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:55,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:09:55,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:09:55,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:09:55,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:55,954 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:55,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:09:55,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:09:55,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:09:55,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:09:55,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:09:55,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:55,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:55,959 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:55,959 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:09:55,959 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:09:55,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:09:55,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:55,960 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:55,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:09:55,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:09:55,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:09:55,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:09:56,053 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 12 proven. 170 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 18:09:56,054 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1199702515] [2020-10-14 18:09:56,054 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:09:56,054 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-14 18:09:56,054 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872353967] [2020-10-14 18:09:56,055 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-14 18:09:56,055 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:09:56,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-14 18:09:56,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1454, Unknown=0, NotChecked=0, Total=1560 [2020-10-14 18:09:56,056 INFO L87 Difference]: Start difference. First operand 71 states and 74 transitions. Second operand 40 states. [2020-10-14 18:09:57,293 WARN L193 SmtUtils]: Spent 788.00 ms on a formula simplification that was a NOOP. DAG size: 229 [2020-10-14 18:09:58,730 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 60 [2020-10-14 18:09:58,993 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 69 [2020-10-14 18:09:59,819 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 65 [2020-10-14 18:10:00,077 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 72 [2020-10-14 18:10:00,706 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 51 [2020-10-14 18:10:00,960 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2020-10-14 18:10:03,391 WARN L193 SmtUtils]: Spent 2.26 s on a formula simplification. DAG size of input: 347 DAG size of output: 147 [2020-10-14 18:10:04,779 WARN L193 SmtUtils]: Spent 1.22 s on a formula simplification. DAG size of input: 237 DAG size of output: 128 [2020-10-14 18:10:05,023 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 67 [2020-10-14 18:10:08,444 WARN L193 SmtUtils]: Spent 3.22 s on a formula simplification. DAG size of input: 311 DAG size of output: 287 [2020-10-14 18:10:09,831 WARN L193 SmtUtils]: Spent 1.21 s on a formula simplification. DAG size of input: 230 DAG size of output: 130 [2020-10-14 18:10:15,879 WARN L193 SmtUtils]: Spent 5.88 s on a formula simplification. DAG size of input: 335 DAG size of output: 292 [2020-10-14 18:10:16,439 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 90 [2020-10-14 18:10:17,583 WARN L193 SmtUtils]: Spent 911.00 ms on a formula simplification that was a NOOP. DAG size: 228 [2020-10-14 18:10:21,333 WARN L193 SmtUtils]: Spent 3.57 s on a formula simplification. DAG size of input: 316 DAG size of output: 290 [2020-10-14 18:10:21,961 WARN L193 SmtUtils]: Spent 428.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-14 18:10:25,327 WARN L193 SmtUtils]: Spent 3.16 s on a formula simplification. DAG size of input: 307 DAG size of output: 283 [2020-10-14 18:10:26,286 WARN L193 SmtUtils]: Spent 680.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-14 18:10:27,305 WARN L193 SmtUtils]: Spent 777.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2020-10-14 18:10:31,411 WARN L193 SmtUtils]: Spent 3.91 s on a formula simplification. DAG size of input: 319 DAG size of output: 293 [2020-10-14 18:10:32,003 WARN L193 SmtUtils]: Spent 381.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-14 18:10:32,225 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 62 [2020-10-14 18:10:32,926 WARN L193 SmtUtils]: Spent 518.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-14 18:10:33,636 WARN L193 SmtUtils]: Spent 597.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-14 18:10:37,930 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 326 DAG size of output: 298 [2020-10-14 18:10:38,421 WARN L193 SmtUtils]: Spent 303.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-14 18:10:38,983 WARN L193 SmtUtils]: Spent 397.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-14 18:10:39,598 WARN L193 SmtUtils]: Spent 497.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-14 18:10:44,004 WARN L193 SmtUtils]: Spent 4.23 s on a formula simplification. DAG size of input: 329 DAG size of output: 295 [2020-10-14 18:10:44,391 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2020-10-14 18:10:44,843 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2020-10-14 18:10:45,337 WARN L193 SmtUtils]: Spent 370.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-14 18:10:45,612 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-10-14 18:10:45,880 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-10-14 18:10:46,211 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2020-10-14 18:10:50,848 WARN L193 SmtUtils]: Spent 3.86 s on a formula simplification. DAG size of input: 309 DAG size of output: 285 [2020-10-14 18:10:55,030 WARN L193 SmtUtils]: Spent 3.99 s on a formula simplification. DAG size of input: 312 DAG size of output: 288 [2020-10-14 18:10:55,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:10:55,375 INFO L93 Difference]: Finished difference Result 139 states and 156 transitions. [2020-10-14 18:10:55,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-10-14 18:10:55,376 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 69 [2020-10-14 18:10:55,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:10:55,378 INFO L225 Difference]: With dead ends: 139 [2020-10-14 18:10:55,378 INFO L226 Difference]: Without dead ends: 133 [2020-10-14 18:10:55,382 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2810 ImplicationChecksByTransitivity, 64.4s TimeCoverageRelationStatistics Valid=1009, Invalid=9497, Unknown=0, NotChecked=0, Total=10506 [2020-10-14 18:10:55,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-14 18:10:55,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 100. [2020-10-14 18:10:55,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-14 18:10:55,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 117 transitions. [2020-10-14 18:10:55,396 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 117 transitions. Word has length 69 [2020-10-14 18:10:55,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:10:55,396 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 117 transitions. [2020-10-14 18:10:55,396 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-14 18:10:55,396 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 117 transitions. [2020-10-14 18:10:55,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-14 18:10:55,397 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:10:55,397 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 7, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:10:55,397 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-14 18:10:55,397 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:10:55,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:10:55,398 INFO L82 PathProgramCache]: Analyzing trace with hash -825704677, now seen corresponding path program 16 times [2020-10-14 18:10:55,398 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:10:55,398 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [708664356] [2020-10-14 18:10:55,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:10:55,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:10:55,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:55,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:55,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:55,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:55,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:55,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:55,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:55,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:55,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:55,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:55,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:55,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:55,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:55,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:55,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:56,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:56,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:58,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:58,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:58,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:58,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:58,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:58,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:58,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:59,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:59,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:59,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:59,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:59,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:59,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:59,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:59,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:00,415 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:11:00,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-14 18:11:00,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 32 [2020-10-14 18:11:00,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 18:11:00,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:11:00,416 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:11:00,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 18:11:00,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:11:00,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-14 18:11:00,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:11:00,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:11:00,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:11:00,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:00,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:11:00,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:11:00,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:11:00,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:11:00,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:11:00,743 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:11:00,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:11:00,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:11:00,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:11:00,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:11:00,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:11:00,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:11:00,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:00,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:11:00,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:11:00,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:11:00,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:11:00,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:11:00,746 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:11:00,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:11:00,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:11:00,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:11:00,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:11:00,753 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 92 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:11:00,754 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [708664356] [2020-10-14 18:11:00,754 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:11:00,754 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-14 18:11:00,754 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708695335] [2020-10-14 18:11:00,755 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-14 18:11:00,755 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:11:00,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-14 18:11:00,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2020-10-14 18:11:00,755 INFO L87 Difference]: Start difference. First operand 100 states and 117 transitions. Second operand 22 states. [2020-10-14 18:11:01,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:11:01,833 INFO L93 Difference]: Finished difference Result 157 states and 175 transitions. [2020-10-14 18:11:01,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-14 18:11:01,834 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 72 [2020-10-14 18:11:01,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:11:01,836 INFO L225 Difference]: With dead ends: 157 [2020-10-14 18:11:01,836 INFO L226 Difference]: Without dead ends: 151 [2020-10-14 18:11:01,837 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=379, Invalid=1261, Unknown=0, NotChecked=0, Total=1640 [2020-10-14 18:11:01,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-14 18:11:01,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 74. [2020-10-14 18:11:01,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-14 18:11:01,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 77 transitions. [2020-10-14 18:11:01,848 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 77 transitions. Word has length 72 [2020-10-14 18:11:01,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:11:01,848 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 77 transitions. [2020-10-14 18:11:01,848 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-14 18:11:01,848 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 77 transitions. [2020-10-14 18:11:01,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-14 18:11:01,848 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:11:01,849 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:11:01,849 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-14 18:11:01,849 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:11:01,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:11:01,849 INFO L82 PathProgramCache]: Analyzing trace with hash -838086374, now seen corresponding path program 17 times [2020-10-14 18:11:01,849 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:11:01,849 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [446138210] [2020-10-14 18:11:01,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:11:01,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:11:01,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:02,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:02,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:02,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:02,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:03,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:03,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:03,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:03,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:04,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:04,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:04,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:04,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:06,877 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:11:06,877 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-14 18:11:06,877 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-14 18:11:06,878 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-14 18:11:06,878 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:11:06,878 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:11:06,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 18:11:06,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:11:06,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-14 18:11:06,879 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:11:07,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:11:07,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:11:07,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:07,205 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:11:07,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:11:07,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:11:07,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:11:07,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:11:07,206 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:11:07,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:11:07,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:11:07,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:11:07,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:11:07,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:11:07,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:11:07,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:07,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:11:07,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:11:07,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:11:07,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:11:07,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:11:07,209 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:11:07,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:11:07,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:11:07,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:11:07,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:11:07,215 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 117 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:11:07,215 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [446138210] [2020-10-14 18:11:07,215 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:11:07,215 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-14 18:11:07,215 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549017238] [2020-10-14 18:11:07,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-14 18:11:07,216 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:11:07,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-14 18:11:07,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2020-10-14 18:11:07,216 INFO L87 Difference]: Start difference. First operand 74 states and 77 transitions. Second operand 22 states. [2020-10-14 18:11:07,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:11:07,948 INFO L93 Difference]: Finished difference Result 115 states and 120 transitions. [2020-10-14 18:11:07,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-14 18:11:07,949 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 72 [2020-10-14 18:11:07,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:11:07,949 INFO L225 Difference]: With dead ends: 115 [2020-10-14 18:11:07,950 INFO L226 Difference]: Without dead ends: 80 [2020-10-14 18:11:07,950 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=234, Invalid=758, Unknown=0, NotChecked=0, Total=992 [2020-10-14 18:11:07,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-14 18:11:07,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 77. [2020-10-14 18:11:07,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-14 18:11:07,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 81 transitions. [2020-10-14 18:11:07,964 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 81 transitions. Word has length 72 [2020-10-14 18:11:07,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:11:07,964 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 81 transitions. [2020-10-14 18:11:07,964 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-14 18:11:07,964 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 81 transitions. [2020-10-14 18:11:07,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-14 18:11:07,965 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:11:07,965 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:11:07,965 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-14 18:11:07,965 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:11:07,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:11:07,966 INFO L82 PathProgramCache]: Analyzing trace with hash 1840514608, now seen corresponding path program 18 times [2020-10-14 18:11:07,966 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:11:07,966 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1663294338] [2020-10-14 18:11:07,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:11:07,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:11:08,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:08,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:08,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:08,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:09,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:09,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:09,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:09,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:09,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:09,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:09,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:10,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:12,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:13,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:11:13,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-14 18:11:13,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-14 18:11:13,340 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5353 [2020-10-14 18:11:13,340 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:11:13,340 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:11:13,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-14 18:11:13,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:11:13,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-14 18:11:13,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:11:13,810 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 29 [2020-10-14 18:11:14,343 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 29 [2020-10-14 18:11:14,496 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 30 [2020-10-14 18:11:14,673 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 36 [2020-10-14 18:11:14,964 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2020-10-14 18:11:15,292 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2020-10-14 18:11:16,065 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2020-10-14 18:11:16,396 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 53 [2020-10-14 18:11:18,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:11:18,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:11:18,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:18,297 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:11:18,297 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:11:18,297 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:11:18,297 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:11:18,298 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:11:18,298 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:11:18,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:11:18,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:11:18,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:11:18,298 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:11:18,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:11:18,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:11:18,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:18,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:11:18,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:11:18,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:11:18,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:11:18,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:11:18,301 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:11:18,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:11:18,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:11:18,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:11:18,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:11:18,348 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 6 proven. 228 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:11:18,348 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1663294338] [2020-10-14 18:11:18,348 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:11:18,349 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-14 18:11:18,349 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323608410] [2020-10-14 18:11:18,349 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-14 18:11:18,349 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:11:18,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-14 18:11:18,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1507, Unknown=0, NotChecked=0, Total=1640 [2020-10-14 18:11:18,350 INFO L87 Difference]: Start difference. First operand 77 states and 81 transitions. Second operand 41 states. [2020-10-14 18:11:20,185 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 53 [2020-10-14 18:11:20,488 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2020-10-14 18:11:21,494 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2020-10-14 18:11:21,754 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 58 [2020-10-14 18:11:22,119 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 62 [2020-10-14 18:11:22,918 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 63 [2020-10-14 18:11:23,592 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 63 [2020-10-14 18:11:23,949 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 66 [2020-10-14 18:11:24,709 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 64 [2020-10-14 18:11:25,392 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 61 [2020-10-14 18:11:25,784 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 67 [2020-10-14 18:11:26,462 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 66 [2020-10-14 18:11:26,877 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 59 [2020-10-14 18:11:27,148 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 63 [2020-10-14 18:11:27,541 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 59 [2020-10-14 18:11:27,925 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 58 [2020-10-14 18:11:28,319 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-10-14 18:11:28,732 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2020-10-14 18:11:29,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:11:29,087 INFO L93 Difference]: Finished difference Result 154 states and 177 transitions. [2020-10-14 18:11:29,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-14 18:11:29,088 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 75 [2020-10-14 18:11:29,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:11:29,089 INFO L225 Difference]: With dead ends: 154 [2020-10-14 18:11:29,089 INFO L226 Difference]: Without dead ends: 106 [2020-10-14 18:11:29,091 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 965 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=367, Invalid=4055, Unknown=0, NotChecked=0, Total=4422 [2020-10-14 18:11:29,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-14 18:11:29,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 100. [2020-10-14 18:11:29,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-14 18:11:29,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 105 transitions. [2020-10-14 18:11:29,108 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 105 transitions. Word has length 75 [2020-10-14 18:11:29,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:11:29,108 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 105 transitions. [2020-10-14 18:11:29,108 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-14 18:11:29,108 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 105 transitions. [2020-10-14 18:11:29,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-14 18:11:29,109 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:11:29,109 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:11:29,110 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-14 18:11:29,110 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:11:29,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:11:29,110 INFO L82 PathProgramCache]: Analyzing trace with hash 2085400639, now seen corresponding path program 19 times [2020-10-14 18:11:29,111 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:11:29,111 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [975771034] [2020-10-14 18:11:29,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:11:29,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:11:29,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:29,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:29,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:29,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:29,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:30,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:31,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:31,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:31,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:31,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:32,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:32,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:32,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:33,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:34,127 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:11:34,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-14 18:11:34,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-14 18:11:34,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 18:11:34,128 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:11:34,128 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:11:34,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-14 18:11:34,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:11:34,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-14 18:11:34,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:11:34,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:11:34,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:11:34,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:34,831 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:11:34,831 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:11:34,831 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:11:34,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:11:34,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:11:34,832 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:11:34,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:11:34,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:11:34,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:11:34,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-14 18:11:34,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:11:34,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:11:34,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:34,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:11:34,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:11:34,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:11:34,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:11:34,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:11:34,842 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:11:34,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:11:34,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:11:34,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:11:34,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:11:34,853 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 145 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:11:34,854 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [975771034] [2020-10-14 18:11:34,854 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:11:34,854 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-14 18:11:34,855 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550858508] [2020-10-14 18:11:34,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-14 18:11:34,855 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:11:34,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-14 18:11:34,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=417, Unknown=0, NotChecked=0, Total=552 [2020-10-14 18:11:34,857 INFO L87 Difference]: Start difference. First operand 100 states and 105 transitions. Second operand 24 states. [2020-10-14 18:11:35,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:11:35,828 INFO L93 Difference]: Finished difference Result 149 states and 156 transitions. [2020-10-14 18:11:35,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-14 18:11:35,831 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 78 [2020-10-14 18:11:35,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:11:35,833 INFO L225 Difference]: With dead ends: 149 [2020-10-14 18:11:35,833 INFO L226 Difference]: Without dead ends: 111 [2020-10-14 18:11:35,834 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=279, Invalid=911, Unknown=0, NotChecked=0, Total=1190 [2020-10-14 18:11:35,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-14 18:11:35,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 103. [2020-10-14 18:11:35,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-14 18:11:35,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 108 transitions. [2020-10-14 18:11:35,850 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 108 transitions. Word has length 78 [2020-10-14 18:11:35,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:11:35,850 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 108 transitions. [2020-10-14 18:11:35,850 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-14 18:11:35,850 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 108 transitions. [2020-10-14 18:11:35,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-14 18:11:35,851 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:11:35,851 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:11:35,852 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-14 18:11:35,852 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:11:35,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:11:35,852 INFO L82 PathProgramCache]: Analyzing trace with hash -1572987245, now seen corresponding path program 20 times [2020-10-14 18:11:35,852 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:11:35,853 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2027907049] [2020-10-14 18:11:35,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:11:35,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:11:35,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:36,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:37,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:38,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:38,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:38,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:39,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:39,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:40,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:11:40,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-14 18:11:40,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 18:11:40,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 18:11:40,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:11:40,874 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:11:40,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-14 18:11:40,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:11:40,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-14 18:11:40,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:11:41,547 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 32 [2020-10-14 18:11:41,805 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 31 [2020-10-14 18:11:42,383 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 36 [2020-10-14 18:11:42,926 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2020-10-14 18:11:43,239 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2020-10-14 18:11:44,724 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 51 [2020-10-14 18:11:46,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:11:46,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:11:46,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:46,867 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:11:46,867 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:11:46,867 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:11:46,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:11:46,867 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:11:46,868 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:11:46,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:11:46,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:11:46,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:11:46,868 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:11:46,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:11:46,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:11:46,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:46,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:11:46,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:11:46,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:11:46,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:11:46,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:11:46,872 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:11:46,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:11:46,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:11:46,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:11:46,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:11:46,941 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 8 proven. 282 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:11:46,942 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2027907049] [2020-10-14 18:11:46,942 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:11:46,942 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-14 18:11:46,943 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675633611] [2020-10-14 18:11:46,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-14 18:11:46,944 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:11:46,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-14 18:11:46,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1869, Unknown=0, NotChecked=0, Total=1980 [2020-10-14 18:11:46,945 INFO L87 Difference]: Start difference. First operand 103 states and 108 transitions. Second operand 45 states. [2020-10-14 18:11:49,503 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2020-10-14 18:11:50,555 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 57 [2020-10-14 18:11:51,159 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 62 [2020-10-14 18:11:51,622 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 62 [2020-10-14 18:11:52,058 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 67 [2020-10-14 18:11:52,677 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 73 [2020-10-14 18:11:53,167 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 69 [2020-10-14 18:11:53,633 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 77