/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/brs1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 18:07:59,784 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 18:07:59,787 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 18:07:59,828 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 18:07:59,829 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 18:07:59,837 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 18:07:59,840 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 18:07:59,844 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 18:07:59,847 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 18:07:59,852 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 18:07:59,853 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 18:07:59,854 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 18:07:59,855 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 18:07:59,858 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 18:07:59,860 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 18:07:59,862 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 18:07:59,863 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 18:07:59,864 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 18:07:59,866 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 18:07:59,875 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 18:07:59,877 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 18:07:59,878 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 18:07:59,879 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 18:07:59,880 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 18:07:59,892 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 18:07:59,898 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 18:07:59,898 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 18:07:59,899 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 18:07:59,900 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 18:07:59,901 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 18:07:59,901 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 18:07:59,904 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 18:07:59,904 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 18:07:59,905 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 18:07:59,906 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 18:07:59,906 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 18:07:59,908 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 18:07:59,908 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 18:07:59,908 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 18:07:59,910 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 18:07:59,911 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 18:07:59,912 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 18:07:59,944 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 18:07:59,945 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 18:07:59,946 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 18:07:59,946 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 18:07:59,946 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 18:07:59,946 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 18:07:59,947 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 18:07:59,947 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 18:07:59,947 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 18:07:59,947 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 18:07:59,947 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 18:07:59,947 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 18:07:59,948 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 18:07:59,948 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 18:07:59,948 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 18:07:59,948 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 18:07:59,948 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 18:07:59,949 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 18:07:59,949 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 18:07:59,949 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 18:07:59,949 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 18:07:59,949 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 18:07:59,950 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 18:07:59,950 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 18:07:59,950 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 18:07:59,950 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 18:07:59,950 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 18:07:59,950 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 18:07:59,951 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 18:07:59,951 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 18:08:00,254 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 18:08:00,268 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 18:08:00,271 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 18:08:00,273 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 18:08:00,273 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 18:08:00,274 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/brs1.c [2020-10-14 18:08:00,336 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1b7eb384c/cf3ca8a45e7b4400803cc73ec79eafab/FLAG4a84b7b9d [2020-10-14 18:08:00,772 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 18:08:00,773 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/brs1.c [2020-10-14 18:08:00,780 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1b7eb384c/cf3ca8a45e7b4400803cc73ec79eafab/FLAG4a84b7b9d [2020-10-14 18:08:01,176 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1b7eb384c/cf3ca8a45e7b4400803cc73ec79eafab [2020-10-14 18:08:01,184 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 18:08:01,185 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 18:08:01,188 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 18:08:01,188 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 18:08:01,192 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 18:08:01,193 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 06:08:01" (1/1) ... [2020-10-14 18:08:01,197 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b599924 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:08:01, skipping insertion in model container [2020-10-14 18:08:01,197 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 06:08:01" (1/1) ... [2020-10-14 18:08:01,205 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 18:08:01,227 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 18:08:01,454 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 18:08:01,466 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 18:08:01,503 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 18:08:01,525 INFO L208 MainTranslator]: Completed translation [2020-10-14 18:08:01,526 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:08:01 WrapperNode [2020-10-14 18:08:01,527 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 18:08:01,528 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 18:08:01,528 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 18:08:01,528 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 18:08:01,648 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:08:01" (1/1) ... [2020-10-14 18:08:01,650 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:08:01" (1/1) ... [2020-10-14 18:08:01,661 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:08:01" (1/1) ... [2020-10-14 18:08:01,661 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:08:01" (1/1) ... [2020-10-14 18:08:01,674 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:08:01" (1/1) ... [2020-10-14 18:08:01,687 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:08:01" (1/1) ... [2020-10-14 18:08:01,688 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:08:01" (1/1) ... [2020-10-14 18:08:01,690 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 18:08:01,691 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 18:08:01,691 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 18:08:01,691 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 18:08:01,692 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:08:01" (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 18:08:01,753 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 18:08:01,753 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 18:08:01,753 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-14 18:08:01,753 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-14 18:08:01,753 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 18:08:01,753 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 18:08:01,754 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-14 18:08:01,754 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-14 18:08:01,755 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-14 18:08:01,755 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-14 18:08:01,755 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-14 18:08:01,755 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 18:08:01,755 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-14 18:08:01,755 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-14 18:08:01,756 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-14 18:08:01,756 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-14 18:08:01,756 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-14 18:08:01,756 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 18:08:01,756 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 18:08:02,029 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 18:08:02,030 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-14 18:08:02,035 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 06:08:02 BoogieIcfgContainer [2020-10-14 18:08:02,035 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 18:08:02,036 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 18:08:02,037 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 18:08:02,040 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 18:08:02,040 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 06:08:01" (1/3) ... [2020-10-14 18:08:02,041 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69147abe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 06:08:02, skipping insertion in model container [2020-10-14 18:08:02,041 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:08:01" (2/3) ... [2020-10-14 18:08:02,041 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69147abe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 06:08:02, skipping insertion in model container [2020-10-14 18:08:02,042 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 06:08:02" (3/3) ... [2020-10-14 18:08:02,043 INFO L109 eAbstractionObserver]: Analyzing ICFG brs1.c [2020-10-14 18:08:02,056 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 18:08:02,064 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 18:08:02,080 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 18:08:02,105 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 18:08:02,106 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 18:08:02,106 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 18:08:02,106 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 18:08:02,106 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 18:08:02,106 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 18:08:02,107 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 18:08:02,107 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 18:08:02,128 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-10-14 18:08:02,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-14 18:08:02,146 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:08:02,147 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 18:08:02,147 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:08:02,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:08:02,168 INFO L82 PathProgramCache]: Analyzing trace with hash 1824292310, now seen corresponding path program 1 times [2020-10-14 18:08:02,174 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:08:02,175 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1946998467] [2020-10-14 18:08:02,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:08:02,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:02,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:02,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:02,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:02,679 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:02,679 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-14 18:08:02,680 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 18:08:02,680 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 354 [2020-10-14 18:08:02,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:02,684 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:02,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 18:08:02,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 18:08:02,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 18:08:02,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-14 18:08:02,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:08:02,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:02,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:02,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:02,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:08:02,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:08:02,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 18:08:02,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:02,782 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:02,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:08:02,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:08:02,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:08:02,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:08:02,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:08:02,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:02,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:02,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:02,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:02,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:08:02,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:08:02,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-14 18:08:02,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:02,806 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:02,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:08:02,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:08:02,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:08:02,807 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:08:02,814 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 18:08:02,815 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1946998467] [2020-10-14 18:08:02,817 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 18:08:02,818 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 18:08:02,819 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365187657] [2020-10-14 18:08:02,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 18:08:02,825 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:08:02,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 18:08:02,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 18:08:02,843 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2020-10-14 18:08:03,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:08:03,044 INFO L93 Difference]: Finished difference Result 62 states and 80 transitions. [2020-10-14 18:08:03,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 18:08:03,046 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-10-14 18:08:03,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:08:03,056 INFO L225 Difference]: With dead ends: 62 [2020-10-14 18:08:03,056 INFO L226 Difference]: Without dead ends: 28 [2020-10-14 18:08:03,060 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 18:08:03,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-14 18:08:03,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-14 18:08:03,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-14 18:08:03,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-10-14 18:08:03,104 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 21 [2020-10-14 18:08:03,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:08:03,105 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-10-14 18:08:03,105 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 18:08:03,105 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-10-14 18:08:03,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-14 18:08:03,106 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:08:03,107 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 18:08:03,107 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 18:08:03,108 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:08:03,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:08:03,108 INFO L82 PathProgramCache]: Analyzing trace with hash -395878216, now seen corresponding path program 1 times [2020-10-14 18:08:03,109 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:08:03,109 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1774859768] [2020-10-14 18:08:03,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:08:03,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:03,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:03,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:03,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:03,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:03,621 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-14 18:08:03,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 18:08:03,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 488 [2020-10-14 18:08:03,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:03,623 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:03,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 18:08:03,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 18:08:03,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-14 18:08:03,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 18:08:03,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:08:03,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:03,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:03,734 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:03,734 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:08:03,735 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:08:03,735 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 18:08:03,735 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:03,735 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:03,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:08:03,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:08:03,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:08:03,736 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:08:03,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:08:03,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:03,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:03,747 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:03,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:08:03,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:08:03,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 18:08:03,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:03,749 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:03,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:08:03,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:08:03,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:08:03,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:08:03,754 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 18:08:03,755 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1774859768] [2020-10-14 18:08:03,755 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 18:08:03,755 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-14 18:08:03,756 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611247179] [2020-10-14 18:08:03,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 18:08:03,758 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:08:03,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 18:08:03,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-14 18:08:03,759 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 8 states. [2020-10-14 18:08:03,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:08:03,952 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2020-10-14 18:08:03,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 18:08:03,953 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-10-14 18:08:03,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:08:03,954 INFO L225 Difference]: With dead ends: 37 [2020-10-14 18:08:03,954 INFO L226 Difference]: Without dead ends: 31 [2020-10-14 18:08:03,956 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 18:08:03,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-14 18:08:03,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2020-10-14 18:08:03,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-14 18:08:03,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-10-14 18:08:03,964 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 27 [2020-10-14 18:08:03,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:08:03,964 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-10-14 18:08:03,964 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 18:08:03,964 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-10-14 18:08:03,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-14 18:08:03,965 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:08:03,966 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 18:08:03,966 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 18:08:03,966 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:08:03,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:08:03,967 INFO L82 PathProgramCache]: Analyzing trace with hash -1205224842, now seen corresponding path program 1 times [2020-10-14 18:08:03,967 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:08:03,967 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [780670061] [2020-10-14 18:08:03,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:08:03,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:03,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:03,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:04,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:04,323 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:04,323 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-14 18:08:04,323 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 18:08:04,323 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 342 [2020-10-14 18:08:04,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:04,324 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:04,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 18:08:04,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 18:08:04,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 18:08:04,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:08:04,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:08:04,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:04,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:04,463 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:04,464 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:08:04,464 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:08:04,464 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 18:08:04,464 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:04,465 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:04,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:08:04,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:08:04,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:08:04,465 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:08:04,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:08:04,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:04,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:04,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:04,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:08:04,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:08:04,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 18:08:04,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:04,475 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:04,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:08:04,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:08:04,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:08:04,476 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:08:04,479 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 18:08:04,479 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [780670061] [2020-10-14 18:08:04,480 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:08:04,480 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 18:08:04,480 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934057821] [2020-10-14 18:08:04,481 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 18:08:04,481 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:08:04,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 18:08:04,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-10-14 18:08:04,482 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 10 states. [2020-10-14 18:08:04,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:08:04,717 INFO L93 Difference]: Finished difference Result 53 states and 60 transitions. [2020-10-14 18:08:04,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 18:08:04,718 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-10-14 18:08:04,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:08:04,719 INFO L225 Difference]: With dead ends: 53 [2020-10-14 18:08:04,719 INFO L226 Difference]: Without dead ends: 40 [2020-10-14 18:08:04,720 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 18:08:04,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-14 18:08:04,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 35. [2020-10-14 18:08:04,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-14 18:08:04,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2020-10-14 18:08:04,728 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 27 [2020-10-14 18:08:04,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:08:04,728 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2020-10-14 18:08:04,728 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 18:08:04,729 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2020-10-14 18:08:04,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-14 18:08:04,730 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:08:04,730 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:08:04,730 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 18:08:04,731 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:08:04,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:08:04,731 INFO L82 PathProgramCache]: Analyzing trace with hash -1781264291, now seen corresponding path program 1 times [2020-10-14 18:08:04,731 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:08:04,732 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1982616668] [2020-10-14 18:08:04,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:08:04,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:04,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:04,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:04,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:04,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:05,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:05,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:05,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:05,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:06,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:06,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:06,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:06,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:06,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:07,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:08,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:08,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:08,383 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:08,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-14 18:08:08,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-14 18:08:08,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3623 [2020-10-14 18:08:08,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:08,384 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:08,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 18:08:08,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 18:08:08,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-14 18:08:08,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:08:08,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:08:08,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:08,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:08,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:08,611 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:08:08,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:08:08,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:08:08,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:08,613 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:08,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:08:08,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:08:08,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:08:08,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:08:08,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:08:08,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:08,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:08,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:08,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:08:08,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:08:08,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 18:08:08,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:08,623 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:08,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:08:08,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:08:08,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:08:08,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:08:08,632 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 18:08:08,633 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1982616668] [2020-10-14 18:08:08,634 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:08:08,634 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 18:08:08,634 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972747842] [2020-10-14 18:08:08,635 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 18:08:08,635 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:08:08,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 18:08:08,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2020-10-14 18:08:08,636 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand 13 states. [2020-10-14 18:08:09,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:08:09,104 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2020-10-14 18:08:09,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-14 18:08:09,104 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 33 [2020-10-14 18:08:09,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:08:09,106 INFO L225 Difference]: With dead ends: 58 [2020-10-14 18:08:09,106 INFO L226 Difference]: Without dead ends: 40 [2020-10-14 18:08:09,107 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2020-10-14 18:08:09,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-14 18:08:09,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2020-10-14 18:08:09,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-14 18:08:09,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2020-10-14 18:08:09,114 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 33 [2020-10-14 18:08:09,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:08:09,115 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2020-10-14 18:08:09,115 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 18:08:09,115 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2020-10-14 18:08:09,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-14 18:08:09,116 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:08:09,116 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2020-10-14 18:08:09,117 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 18:08:09,117 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:08:09,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:08:09,117 INFO L82 PathProgramCache]: Analyzing trace with hash -456336654, now seen corresponding path program 2 times [2020-10-14 18:08:09,117 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:08:09,118 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1092188026] [2020-10-14 18:08:09,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:08:09,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:09,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:09,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:09,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:09,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:09,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:09,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:09,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:10,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:11,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:11,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:11,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:12,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:12,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:12,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:12,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:12,729 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:12,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-14 18:08:12,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-14 18:08:12,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3598 [2020-10-14 18:08:12,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:12,731 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:12,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 18:08:12,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 18:08:12,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-14 18:08:12,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-14 18:08:12,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:08:12,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:12,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:12,928 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:12,928 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:08:12,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:08:12,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:08:12,929 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:12,929 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:12,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:08:12,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:08:12,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:08:12,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:08:12,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:08:12,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:12,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:12,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:12,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:08:12,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:08:12,941 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 18:08:12,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:12,942 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:12,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:08:12,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:08:12,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:08:12,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:08:12,948 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 18:08:12,949 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1092188026] [2020-10-14 18:08:12,949 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:08:12,949 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 18:08:12,949 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435431307] [2020-10-14 18:08:12,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 18:08:12,951 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:08:12,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 18:08:12,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-10-14 18:08:12,952 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 13 states. [2020-10-14 18:08:13,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:08:13,409 INFO L93 Difference]: Finished difference Result 61 states and 66 transitions. [2020-10-14 18:08:13,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 18:08:13,410 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2020-10-14 18:08:13,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:08:13,411 INFO L225 Difference]: With dead ends: 61 [2020-10-14 18:08:13,412 INFO L226 Difference]: Without dead ends: 44 [2020-10-14 18:08:13,413 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=160, Invalid=440, Unknown=0, NotChecked=0, Total=600 [2020-10-14 18:08:13,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-14 18:08:13,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 40. [2020-10-14 18:08:13,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-14 18:08:13,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2020-10-14 18:08:13,423 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 36 [2020-10-14 18:08:13,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:08:13,424 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2020-10-14 18:08:13,424 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 18:08:13,425 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2020-10-14 18:08:13,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-14 18:08:13,426 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:08:13,426 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:08:13,426 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 18:08:13,427 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:08:13,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:08:13,427 INFO L82 PathProgramCache]: Analyzing trace with hash -1898893800, now seen corresponding path program 3 times [2020-10-14 18:08:13,427 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:08:13,428 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1697211288] [2020-10-14 18:08:13,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:08:13,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:13,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:13,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:13,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:13,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:14,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:14,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:14,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:14,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:14,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:15,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:15,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:15,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:16,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:16,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:16,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:16,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:16,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:16,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:17,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:17,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:17,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:17,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:17,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:17,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:17,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:17,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:18,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:18,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:18,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:18,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-14 18:08:18,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 28 [2020-10-14 18:08:18,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-14 18:08:18,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:18,452 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:18,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 18:08:18,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 18:08:18,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-14 18:08:18,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:08:19,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:08:19,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:19,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:19,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:19,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:08:19,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:08:19,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:08:19,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:19,266 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:19,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:08:19,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:08:19,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:08:19,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:08:19,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:08:19,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:19,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:19,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:19,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:08:19,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:08:19,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:08:19,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:19,275 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:19,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:08:19,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:08:19,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:08:19,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 18:08:19,289 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 18:08:19,289 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1697211288] [2020-10-14 18:08:19,290 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:08:19,290 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-14 18:08:19,290 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530773562] [2020-10-14 18:08:19,291 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-14 18:08:19,291 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:08:19,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-14 18:08:19,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2020-10-14 18:08:19,292 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 20 states. [2020-10-14 18:08:19,967 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 55 [2020-10-14 18:08:20,278 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 61 [2020-10-14 18:08:20,507 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2020-10-14 18:08:21,071 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2020-10-14 18:08:21,283 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 56 [2020-10-14 18:08:21,513 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-10-14 18:08:21,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:08:21,555 INFO L93 Difference]: Finished difference Result 54 states and 57 transitions. [2020-10-14 18:08:21,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-14 18:08:21,555 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 39 [2020-10-14 18:08:21,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:08:21,557 INFO L225 Difference]: With dead ends: 54 [2020-10-14 18:08:21,557 INFO L226 Difference]: Without dead ends: 48 [2020-10-14 18:08:21,558 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=282, Invalid=1440, Unknown=0, NotChecked=0, Total=1722 [2020-10-14 18:08:21,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-14 18:08:21,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2020-10-14 18:08:21,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-14 18:08:21,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2020-10-14 18:08:21,579 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 39 [2020-10-14 18:08:21,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:08:21,580 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2020-10-14 18:08:21,580 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-14 18:08:21,580 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2020-10-14 18:08:21,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-14 18:08:21,582 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:08:21,583 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:08:21,584 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 18:08:21,584 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:08:21,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:08:21,584 INFO L82 PathProgramCache]: Analyzing trace with hash -63725737, now seen corresponding path program 4 times [2020-10-14 18:08:21,585 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:08:21,585 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1175899435] [2020-10-14 18:08:21,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:08:21,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:21,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:21,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:21,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:21,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:22,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:22,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:22,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:22,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:23,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:24,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:25,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:25,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:25,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:26,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:26,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:26,609 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-14 18:08:26,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-14 18:08:26,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 18:08:26,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:26,610 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:26,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 18:08:26,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 18:08:26,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-14 18:08:26,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:08:26,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:08:26,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:26,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:26,867 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:26,867 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:08:26,867 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:08:26,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:08:26,868 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:26,868 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:26,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:08:26,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:08:26,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:08:26,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:08:26,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:08:26,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:26,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:26,878 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:26,878 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:08:26,878 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:08:26,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 18:08:26,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:26,879 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:26,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:08:26,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:08:26,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:08:26,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:08:26,888 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 18:08:26,890 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1175899435] [2020-10-14 18:08:26,891 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:08:26,891 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 18:08:26,892 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176493564] [2020-10-14 18:08:26,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 18:08:26,893 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:08:26,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 18:08:26,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2020-10-14 18:08:26,895 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand 16 states. [2020-10-14 18:08:27,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:08:27,586 INFO L93 Difference]: Finished difference Result 92 states and 102 transitions. [2020-10-14 18:08:27,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-14 18:08:27,587 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 42 [2020-10-14 18:08:27,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:08:27,592 INFO L225 Difference]: With dead ends: 92 [2020-10-14 18:08:27,592 INFO L226 Difference]: Without dead ends: 86 [2020-10-14 18:08:27,593 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=250, Invalid=806, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 18:08:27,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-14 18:08:27,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 66. [2020-10-14 18:08:27,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-14 18:08:27,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 73 transitions. [2020-10-14 18:08:27,605 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 73 transitions. Word has length 42 [2020-10-14 18:08:27,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:08:27,605 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 73 transitions. [2020-10-14 18:08:27,606 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 18:08:27,606 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 73 transitions. [2020-10-14 18:08:27,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-14 18:08:27,607 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:08:27,607 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:08:27,607 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 18:08:27,607 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:08:27,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:08:27,608 INFO L82 PathProgramCache]: Analyzing trace with hash 1800445562, now seen corresponding path program 5 times [2020-10-14 18:08:27,608 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:08:27,608 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2081608073] [2020-10-14 18:08:27,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:08:27,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:27,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:27,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:27,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:27,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:27,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:27,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:27,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:28,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:28,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:28,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:28,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:29,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:29,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:29,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:30,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:30,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:31,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:31,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:31,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:31,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:32,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:32,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-14 18:08:32,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 20 [2020-10-14 18:08:32,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 18:08:32,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:32,625 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:32,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 18:08:32,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:08:32,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-14 18:08:32,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:08:32,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:08:32,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:32,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:32,991 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:32,991 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:08:32,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:08:32,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:08:32,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:32,992 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:32,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:08:32,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:08:32,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:08:32,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:08:32,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:08:32,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:32,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:32,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:32,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:08:32,997 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:08:32,997 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:08:32,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:32,998 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:32,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:08:32,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:08:32,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:08:32,998 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:08:33,009 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 2 proven. 38 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-14 18:08:33,009 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2081608073] [2020-10-14 18:08:33,010 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:08:33,010 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 18:08:33,010 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042305449] [2020-10-14 18:08:33,011 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 18:08:33,011 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:08:33,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 18:08:33,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2020-10-14 18:08:33,012 INFO L87 Difference]: Start difference. First operand 66 states and 73 transitions. Second operand 17 states. [2020-10-14 18:08:33,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:08:33,800 INFO L93 Difference]: Finished difference Result 107 states and 123 transitions. [2020-10-14 18:08:33,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-14 18:08:33,801 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 45 [2020-10-14 18:08:33,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:08:33,802 INFO L225 Difference]: With dead ends: 107 [2020-10-14 18:08:33,803 INFO L226 Difference]: Without dead ends: 55 [2020-10-14 18:08:33,804 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2020-10-14 18:08:33,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-14 18:08:33,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 46. [2020-10-14 18:08:33,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-14 18:08:33,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2020-10-14 18:08:33,814 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 45 [2020-10-14 18:08:33,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:08:33,814 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2020-10-14 18:08:33,814 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 18:08:33,814 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2020-10-14 18:08:33,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-14 18:08:33,818 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:08:33,818 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:08:33,818 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 18:08:33,818 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:08:33,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:08:33,819 INFO L82 PathProgramCache]: Analyzing trace with hash -1835368963, now seen corresponding path program 6 times [2020-10-14 18:08:33,819 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:08:33,819 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [336475391] [2020-10-14 18:08:33,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:08:33,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:33,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:33,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:34,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:34,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:34,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:34,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:34,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:34,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:35,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:35,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:35,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:35,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:35,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:36,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:36,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:36,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:36,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:37,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:37,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:38,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:38,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:38,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:38,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:38,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-14 18:08:38,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 22 [2020-10-14 18:08:38,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-14 18:08:38,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:38,853 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:38,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-14 18:08:38,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:08:38,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-14 18:08:38,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:08:39,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:08:39,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:39,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:39,395 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:39,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:08:39,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:08:39,396 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:08:39,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:39,396 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:39,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:08:39,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:08:39,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:08:39,397 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:08:39,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:08:39,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:39,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:39,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:39,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:08:39,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:08:39,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:08:39,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:39,401 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:39,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:08:39,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:08:39,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:08:39,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:08:39,418 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 18:08:39,419 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [336475391] [2020-10-14 18:08:39,419 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:08:39,419 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-14 18:08:39,419 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517029825] [2020-10-14 18:08:39,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-14 18:08:39,420 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:08:39,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-14 18:08:39,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2020-10-14 18:08:39,422 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 21 states. [2020-10-14 18:08:40,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:08:40,589 INFO L93 Difference]: Finished difference Result 73 states and 79 transitions. [2020-10-14 18:08:40,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-14 18:08:40,589 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 45 [2020-10-14 18:08:40,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:08:40,590 INFO L225 Difference]: With dead ends: 73 [2020-10-14 18:08:40,590 INFO L226 Difference]: Without dead ends: 52 [2020-10-14 18:08:40,591 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=152, Invalid=904, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 18:08:40,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-14 18:08:40,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 49. [2020-10-14 18:08:40,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-14 18:08:40,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2020-10-14 18:08:40,599 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 45 [2020-10-14 18:08:40,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:08:40,600 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2020-10-14 18:08:40,600 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-14 18:08:40,600 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2020-10-14 18:08:40,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-14 18:08:40,601 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:08:40,601 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:08:40,601 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 18:08:40,601 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:08:40,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:08:40,602 INFO L82 PathProgramCache]: Analyzing trace with hash -1675884206, now seen corresponding path program 7 times [2020-10-14 18:08:40,602 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:08:40,602 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [360848786] [2020-10-14 18:08:40,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:08:40,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:40,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:40,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:40,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:40,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:40,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:40,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:41,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:41,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:41,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:42,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:43,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:43,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:44,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:44,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:44,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:44,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:44,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:44,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:45,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:45,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-14 18:08:45,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-14 18:08:45,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 18:08:45,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:45,613 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:45,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 18:08:45,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 18:08:45,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-14 18:08:45,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:08:45,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:08:45,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:45,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:45,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:45,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:08:45,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:08:45,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:08:45,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:45,940 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:45,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:08:45,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:08:45,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:08:45,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:08:45,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:08:45,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:45,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:45,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:45,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:08:45,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:08:45,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:08:45,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:45,945 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:45,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:08:45,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:08:45,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:08:45,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:08:45,952 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 18:08:45,952 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [360848786] [2020-10-14 18:08:45,952 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:08:45,952 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-14 18:08:45,953 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173807684] [2020-10-14 18:08:45,953 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-14 18:08:45,953 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:08:45,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-14 18:08:45,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2020-10-14 18:08:45,954 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand 19 states. [2020-10-14 18:08:46,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:08:46,792 INFO L93 Difference]: Finished difference Result 79 states and 84 transitions. [2020-10-14 18:08:46,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-14 18:08:46,792 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 48 [2020-10-14 18:08:46,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:08:46,793 INFO L225 Difference]: With dead ends: 79 [2020-10-14 18:08:46,793 INFO L226 Difference]: Without dead ends: 56 [2020-10-14 18:08:46,795 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=343, Invalid=1139, Unknown=0, NotChecked=0, Total=1482 [2020-10-14 18:08:46,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-14 18:08:46,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 52. [2020-10-14 18:08:46,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-14 18:08:46,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2020-10-14 18:08:46,806 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 48 [2020-10-14 18:08:46,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:08:46,806 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2020-10-14 18:08:46,806 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-14 18:08:46,807 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2020-10-14 18:08:46,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-14 18:08:46,807 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:08:46,807 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:08:46,808 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 18:08:46,808 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:08:46,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:08:46,808 INFO L82 PathProgramCache]: Analyzing trace with hash 1118753656, now seen corresponding path program 8 times [2020-10-14 18:08:46,809 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:08:46,809 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [629854282] [2020-10-14 18:08:46,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:08:46,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:46,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:47,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:47,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:47,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:47,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:47,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:48,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:48,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:48,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:48,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:49,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:49,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:49,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:50,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:50,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:51,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:51,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:51,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-14 18:08:51,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-14 18:08:51,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 18:08:51,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:51,827 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:51,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-14 18:08:51,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:08:51,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-14 18:08:51,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:08:52,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:08:52,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:52,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:52,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:52,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:08:52,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:08:52,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:08:52,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:52,819 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:52,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:08:52,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:08:52,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:08:52,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:08:52,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:08:52,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:52,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:52,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:52,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:08:52,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:08:52,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:08:52,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:52,824 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:52,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:08:52,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:08:52,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:08:52,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:08:52,843 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:08:52,844 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [629854282] [2020-10-14 18:08:52,844 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:08:52,844 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-14 18:08:52,844 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18998944] [2020-10-14 18:08:52,845 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-14 18:08:52,845 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:08:52,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-14 18:08:52,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2020-10-14 18:08:52,846 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 25 states. [2020-10-14 18:08:54,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:08:54,581 INFO L93 Difference]: Finished difference Result 82 states and 88 transitions. [2020-10-14 18:08:54,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-14 18:08:54,582 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 51 [2020-10-14 18:08:54,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:08:54,583 INFO L225 Difference]: With dead ends: 82 [2020-10-14 18:08:54,583 INFO L226 Difference]: Without dead ends: 58 [2020-10-14 18:08:54,585 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=193, Invalid=1289, Unknown=0, NotChecked=0, Total=1482 [2020-10-14 18:08:54,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-14 18:08:54,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 55. [2020-10-14 18:08:54,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-14 18:08:54,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2020-10-14 18:08:54,592 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 51 [2020-10-14 18:08:54,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:08:54,593 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2020-10-14 18:08:54,593 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-14 18:08:54,593 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2020-10-14 18:08:54,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-14 18:08:54,594 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:08:54,594 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:08:54,594 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 18:08:54,595 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:08:54,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:08:54,595 INFO L82 PathProgramCache]: Analyzing trace with hash 711163383, now seen corresponding path program 9 times [2020-10-14 18:08:54,595 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:08:54,596 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [713894389] [2020-10-14 18:08:54,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:08:54,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:54,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:54,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:54,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:54,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:54,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:55,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:55,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:55,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:55,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:55,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:57,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:58,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:59,606 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:59,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-14 18:08:59,607 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-14 18:08:59,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 18:08:59,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:59,607 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:59,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 18:08:59,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:08:59,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-14 18:08:59,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:08:59,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:08:59,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:59,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:59,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:59,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:08:59,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:08:59,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:08:59,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:59,846 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:59,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:08:59,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:08:59,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:08:59,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:08:59,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:08:59,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:08:59,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:08:59,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:08:59,849 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:08:59,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:08:59,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:08:59,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:08:59,850 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:08:59,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:08:59,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:08:59,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:08:59,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:08:59,857 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 18:08:59,857 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [713894389] [2020-10-14 18:08:59,858 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:08:59,858 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 18:08:59,858 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319685968] [2020-10-14 18:08:59,865 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 18:08:59,866 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:08:59,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 18:08:59,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2020-10-14 18:08:59,867 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand 18 states. [2020-10-14 18:09:01,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:09:01,076 INFO L93 Difference]: Finished difference Result 117 states and 125 transitions. [2020-10-14 18:09:01,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-14 18:09:01,077 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 54 [2020-10-14 18:09:01,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:09:01,078 INFO L225 Difference]: With dead ends: 117 [2020-10-14 18:09:01,079 INFO L226 Difference]: Without dead ends: 73 [2020-10-14 18:09:01,080 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=232, Invalid=1100, Unknown=0, NotChecked=0, Total=1332 [2020-10-14 18:09:01,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-14 18:09:01,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 58. [2020-10-14 18:09:01,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-14 18:09:01,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2020-10-14 18:09:01,088 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 54 [2020-10-14 18:09:01,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:09:01,089 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2020-10-14 18:09:01,089 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 18:09:01,089 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2020-10-14 18:09:01,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-14 18:09:01,090 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:09:01,090 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:09:01,090 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 18:09:01,090 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:09:01,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:09:01,091 INFO L82 PathProgramCache]: Analyzing trace with hash -1604086883, now seen corresponding path program 10 times [2020-10-14 18:09:01,091 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:09:01,091 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1053835964] [2020-10-14 18:09:01,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:09:01,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:01,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:01,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:01,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:01,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:01,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:01,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:01,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:02,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:02,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:02,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:02,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:03,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:04,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:04,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:04,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:04,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:04,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:06,105 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:06,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-14 18:09:06,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-14 18:09:06,105 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-14 18:09:06,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:06,106 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:06,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-14 18:09:06,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:09:06,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-14 18:09:06,106 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:09:07,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:09:07,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:07,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:07,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:07,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:09:07,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:09:07,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:09:07,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:07,231 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:07,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:09:07,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:09:07,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:09:07,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:09:07,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:09:07,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:07,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:07,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:07,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:09:07,234 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:09:07,234 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:09:07,234 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:07,234 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:07,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:09:07,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:09:07,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:09:07,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:09:07,251 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:09:07,251 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1053835964] [2020-10-14 18:09:07,252 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:09:07,252 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-14 18:09:07,252 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522957522] [2020-10-14 18:09:07,252 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-14 18:09:07,253 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:09:07,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-14 18:09:07,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2020-10-14 18:09:07,253 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 29 states. [2020-10-14 18:09:09,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:09:09,563 INFO L93 Difference]: Finished difference Result 91 states and 97 transitions. [2020-10-14 18:09:09,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-14 18:09:09,563 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 57 [2020-10-14 18:09:09,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:09:09,565 INFO L225 Difference]: With dead ends: 91 [2020-10-14 18:09:09,565 INFO L226 Difference]: Without dead ends: 64 [2020-10-14 18:09:09,566 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=263, Invalid=1807, Unknown=0, NotChecked=0, Total=2070 [2020-10-14 18:09:09,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-14 18:09:09,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 61. [2020-10-14 18:09:09,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-14 18:09:09,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2020-10-14 18:09:09,574 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 57 [2020-10-14 18:09:09,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:09:09,574 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2020-10-14 18:09:09,575 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-14 18:09:09,575 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2020-10-14 18:09:09,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-14 18:09:09,576 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:09:09,576 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:09:09,576 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 18:09:09,576 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:09:09,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:09:09,577 INFO L82 PathProgramCache]: Analyzing trace with hash -678981710, now seen corresponding path program 11 times [2020-10-14 18:09:09,577 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:09:09,577 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [671922405] [2020-10-14 18:09:09,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:09:09,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:09,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:09,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:09,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:09,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:09,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:09,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:09,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:10,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:10,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:10,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:10,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:12,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:13,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:13,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:13,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:13,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:14,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:14,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:14,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:14,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:14,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:14,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-14 18:09:14,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 20 [2020-10-14 18:09:14,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-14 18:09:14,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:14,592 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:14,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-14 18:09:14,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 18:09:14,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-14 18:09:14,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:09:15,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:09:15,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:15,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:15,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:15,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:09:15,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:09:15,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:09:15,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:15,138 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:15,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:09:15,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:09:15,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:09:15,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:09:15,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:09:15,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:15,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:15,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:15,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:09:15,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:09:15,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:09:15,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:15,143 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:15,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:09:15,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:09:15,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:09:15,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:09:15,150 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 31 proven. 88 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 18:09:15,150 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [671922405] [2020-10-14 18:09:15,150 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:09:15,150 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-14 18:09:15,151 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344444166] [2020-10-14 18:09:15,151 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-14 18:09:15,151 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:09:15,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-14 18:09:15,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=467, Unknown=0, NotChecked=0, Total=600 [2020-10-14 18:09:15,152 INFO L87 Difference]: Start difference. First operand 61 states and 63 transitions. Second operand 25 states. [2020-10-14 18:09:16,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:09:16,406 INFO L93 Difference]: Finished difference Result 97 states and 102 transitions. [2020-10-14 18:09:16,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-14 18:09:16,406 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 60 [2020-10-14 18:09:16,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:09:16,408 INFO L225 Difference]: With dead ends: 97 [2020-10-14 18:09:16,408 INFO L226 Difference]: Without dead ends: 68 [2020-10-14 18:09:16,410 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 747 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=598, Invalid=2158, Unknown=0, NotChecked=0, Total=2756 [2020-10-14 18:09:16,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-14 18:09:16,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 64. [2020-10-14 18:09:16,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-14 18:09:16,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2020-10-14 18:09:16,418 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 60 [2020-10-14 18:09:16,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:09:16,418 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2020-10-14 18:09:16,419 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-14 18:09:16,419 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2020-10-14 18:09:16,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-14 18:09:16,420 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:09:16,420 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:09:16,420 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 18:09:16,420 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:09:16,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:09:16,420 INFO L82 PathProgramCache]: Analyzing trace with hash -38907688, now seen corresponding path program 12 times [2020-10-14 18:09:16,421 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:09:16,421 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [626952021] [2020-10-14 18:09:16,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:09:16,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:16,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:16,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:17,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:17,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:17,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:19,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:19,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:19,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:19,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:20,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:20,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:20,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:21,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:21,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:21,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-14 18:09:21,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-14 18:09:21,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 18:09:21,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:21,442 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:21,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-14 18:09:21,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:09:21,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-14 18:09:21,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:09:22,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:09:22,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:22,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:22,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:22,923 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:09:22,923 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:09:22,923 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:09:22,923 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:22,923 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:22,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:09:22,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:09:22,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:09:22,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:09:22,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:09:22,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:22,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:22,926 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:22,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:09:22,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:09:22,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:09:22,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:22,926 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:22,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:09:22,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:09:22,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:09:22,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:09:22,950 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 18:09:22,950 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [626952021] [2020-10-14 18:09:22,950 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:09:22,950 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-14 18:09:22,950 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997250800] [2020-10-14 18:09:22,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-14 18:09:22,951 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:09:22,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-14 18:09:22,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=930, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 18:09:22,952 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 33 states. [2020-10-14 18:09:25,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:09:25,984 INFO L93 Difference]: Finished difference Result 100 states and 106 transitions. [2020-10-14 18:09:25,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-14 18:09:25,984 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 63 [2020-10-14 18:09:25,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:09:25,986 INFO L225 Difference]: With dead ends: 100 [2020-10-14 18:09:25,986 INFO L226 Difference]: Without dead ends: 70 [2020-10-14 18:09:25,988 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=326, Invalid=2326, Unknown=0, NotChecked=0, Total=2652 [2020-10-14 18:09:25,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-14 18:09:25,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 67. [2020-10-14 18:09:25,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-14 18:09:25,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 69 transitions. [2020-10-14 18:09:25,995 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 69 transitions. Word has length 63 [2020-10-14 18:09:25,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:09:25,995 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 69 transitions. [2020-10-14 18:09:25,995 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-14 18:09:25,995 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 69 transitions. [2020-10-14 18:09:25,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-14 18:09:25,996 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:09:25,997 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:09:25,997 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 18:09:25,997 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:09:25,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:09:25,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1409451159, now seen corresponding path program 13 times [2020-10-14 18:09:25,997 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:09:25,998 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1042579413] [2020-10-14 18:09:25,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:09:26,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:26,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:26,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:26,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:26,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:27,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:27,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:27,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:27,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:28,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:28,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:29,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:29,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:29,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:29,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:30,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:30,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:31,120 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:31,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-14 18:09:31,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-14 18:09:31,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5111 [2020-10-14 18:09:31,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:31,121 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:31,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 18:09:31,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:09:31,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-14 18:09:31,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:09:31,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:09:31,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:31,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:31,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:31,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:09:31,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:09:31,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:09:31,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:31,365 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:31,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:09:31,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:09:31,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:09:31,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:09:31,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:09:31,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:31,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:31,369 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:31,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:09:31,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:09:31,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:09:31,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:31,371 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:31,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:09:31,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:09:31,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:09:31,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:09:31,383 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 79 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:09:31,383 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1042579413] [2020-10-14 18:09:31,387 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:09:31,388 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-14 18:09:31,388 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73260919] [2020-10-14 18:09:31,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-14 18:09:31,389 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:09:31,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-14 18:09:31,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2020-10-14 18:09:31,390 INFO L87 Difference]: Start difference. First operand 67 states and 69 transitions. Second operand 20 states. [2020-10-14 18:09:31,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:09:31,833 INFO L93 Difference]: Finished difference Result 126 states and 131 transitions. [2020-10-14 18:09:31,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 18:09:31,834 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 66 [2020-10-14 18:09:31,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:09:31,835 INFO L225 Difference]: With dead ends: 126 [2020-10-14 18:09:31,835 INFO L226 Difference]: Without dead ends: 74 [2020-10-14 18:09:31,836 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=193, Invalid=619, Unknown=0, NotChecked=0, Total=812 [2020-10-14 18:09:31,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-14 18:09:31,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 70. [2020-10-14 18:09:31,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-14 18:09:31,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2020-10-14 18:09:31,842 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 66 [2020-10-14 18:09:31,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:09:31,843 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2020-10-14 18:09:31,843 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-14 18:09:31,843 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2020-10-14 18:09:31,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-14 18:09:31,843 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:09:31,844 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 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 18:09:31,844 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 18:09:31,844 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:09:31,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:09:31,844 INFO L82 PathProgramCache]: Analyzing trace with hash 847335741, now seen corresponding path program 14 times [2020-10-14 18:09:31,845 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:09:31,845 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1142575074] [2020-10-14 18:09:31,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:09:31,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:31,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:32,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:32,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:32,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:33,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:34,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:34,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:34,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:34,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:34,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:35,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:35,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:35,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:36,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:36,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:36,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:36,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-14 18:09:36,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-14 18:09:36,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5130 [2020-10-14 18:09:36,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:36,988 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:36,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-14 18:09:36,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:09:36,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-14 18:09:36,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:09:39,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:09:39,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:39,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:39,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:39,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:09:39,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:09:39,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:09:39,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:39,671 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:39,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:09:39,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:09:39,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:09:39,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:09:39,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:09:39,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:39,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:39,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:39,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:09:39,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:09:39,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:09:39,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:39,675 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:39,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:09:39,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:09:39,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:09:39,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:09:39,707 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:09:39,707 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1142575074] [2020-10-14 18:09:39,707 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:09:39,707 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-14 18:09:39,707 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535699487] [2020-10-14 18:09:39,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-14 18:09:39,708 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:09:39,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-14 18:09:39,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1194, Unknown=0, NotChecked=0, Total=1332 [2020-10-14 18:09:39,709 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 37 states. [2020-10-14 18:09:41,686 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 59 [2020-10-14 18:09:41,867 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 59 [2020-10-14 18:09:44,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:09:44,790 INFO L93 Difference]: Finished difference Result 109 states and 115 transitions. [2020-10-14 18:09:44,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-14 18:09:44,791 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 69 [2020-10-14 18:09:44,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:09:44,792 INFO L225 Difference]: With dead ends: 109 [2020-10-14 18:09:44,792 INFO L226 Difference]: Without dead ends: 76 [2020-10-14 18:09:44,794 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 768 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=463, Invalid=3697, Unknown=0, NotChecked=0, Total=4160 [2020-10-14 18:09:44,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-14 18:09:44,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 73. [2020-10-14 18:09:44,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-14 18:09:44,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2020-10-14 18:09:44,805 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 69 [2020-10-14 18:09:44,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:09:44,805 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2020-10-14 18:09:44,806 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-14 18:09:44,806 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2020-10-14 18:09:44,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-14 18:09:44,806 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:09:44,806 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 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 18:09:44,807 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 18:09:44,807 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:09:44,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:09:44,807 INFO L82 PathProgramCache]: Analyzing trace with hash -1971491310, now seen corresponding path program 15 times [2020-10-14 18:09:44,807 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:09:44,808 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1929604539] [2020-10-14 18:09:44,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:09:44,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:44,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:44,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:45,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:45,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:45,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:45,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:45,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:45,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:46,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:46,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:46,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:46,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:47,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:49,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:49,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-14 18:09:49,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-14 18:09:49,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-14 18:09:49,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:49,819 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:49,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 18:09:49,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:09:49,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-14 18:09:49,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:09:50,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:09:50,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:50,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:50,094 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:50,094 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:09:50,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:09:50,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:09:50,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:50,095 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:50,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:09:50,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:09:50,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:09:50,095 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:09:50,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:09:50,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:50,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:50,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:50,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:09:50,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:09:50,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:09:50,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:50,100 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:50,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:09:50,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:09:50,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:09:50,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:09:50,108 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 102 proven. 107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:09:50,109 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1929604539] [2020-10-14 18:09:50,110 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:09:50,111 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-14 18:09:50,111 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467450165] [2020-10-14 18:09:50,114 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-14 18:09:50,114 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:09:50,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-14 18:09:50,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2020-10-14 18:09:50,116 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand 22 states. [2020-10-14 18:09:50,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:09:50,628 INFO L93 Difference]: Finished difference Result 138 states and 143 transitions. [2020-10-14 18:09:50,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-14 18:09:50,629 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 72 [2020-10-14 18:09:50,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:09:50,630 INFO L225 Difference]: With dead ends: 138 [2020-10-14 18:09:50,630 INFO L226 Difference]: Without dead ends: 80 [2020-10-14 18:09:50,631 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=234, Invalid=758, Unknown=0, NotChecked=0, Total=992 [2020-10-14 18:09:50,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-14 18:09:50,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 76. [2020-10-14 18:09:50,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-14 18:09:50,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2020-10-14 18:09:50,639 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 72 [2020-10-14 18:09:50,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:09:50,639 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2020-10-14 18:09:50,639 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-14 18:09:50,639 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2020-10-14 18:09:50,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-14 18:09:50,639 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:09:50,640 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 8, 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 18:09:50,640 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-14 18:09:50,640 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:09:50,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:09:50,640 INFO L82 PathProgramCache]: Analyzing trace with hash -688019912, now seen corresponding path program 16 times [2020-10-14 18:09:50,640 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:09:50,640 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1312986920] [2020-10-14 18:09:50,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:09:50,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:50,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:51,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:51,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:51,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:52,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:54,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:55,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:55,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:55,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:55,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:55,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-14 18:09:55,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-14 18:09:55,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5114 [2020-10-14 18:09:55,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:55,768 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:55,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-14 18:09:55,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:09:55,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-14 18:09:55,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:09:58,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:09:58,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:58,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:58,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:58,361 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:09:58,361 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:09:58,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:09:58,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:58,362 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:58,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:09:58,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:09:58,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:09:58,362 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:09:58,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:09:58,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:09:58,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:09:58,364 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:09:58,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:09:58,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:09:58,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:09:58,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:09:58,365 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:09:58,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:09:58,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:09:58,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:09:58,365 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:09:58,403 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 234 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:09:58,404 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1312986920] [2020-10-14 18:09:58,404 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:09:58,404 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-14 18:09:58,404 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621361660] [2020-10-14 18:09:58,405 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-14 18:09:58,405 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:09:58,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-14 18:09:58,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1497, Unknown=0, NotChecked=0, Total=1640 [2020-10-14 18:09:58,406 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand 41 states. [2020-10-14 18:09:59,660 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 52 [2020-10-14 18:09:59,845 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 56 [2020-10-14 18:10:00,178 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 57 [2020-10-14 18:10:00,346 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 57 [2020-10-14 18:10:03,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:10:03,582 INFO L93 Difference]: Finished difference Result 118 states and 124 transitions. [2020-10-14 18:10:03,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-14 18:10:03,584 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 75 [2020-10-14 18:10:03,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:10:03,585 INFO L225 Difference]: With dead ends: 118 [2020-10-14 18:10:03,585 INFO L226 Difference]: Without dead ends: 82 [2020-10-14 18:10:03,586 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 955 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=514, Invalid=4316, Unknown=0, NotChecked=0, Total=4830 [2020-10-14 18:10:03,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-14 18:10:03,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 79. [2020-10-14 18:10:03,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-14 18:10:03,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 81 transitions. [2020-10-14 18:10:03,597 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 81 transitions. Word has length 75 [2020-10-14 18:10:03,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:10:03,598 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 81 transitions. [2020-10-14 18:10:03,598 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-14 18:10:03,598 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 81 transitions. [2020-10-14 18:10:03,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-14 18:10:03,599 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:10:03,599 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 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 18:10:03,599 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-14 18:10:03,599 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:10:03,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:10:03,600 INFO L82 PathProgramCache]: Analyzing trace with hash -350047433, now seen corresponding path program 17 times [2020-10-14 18:10:03,600 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:10:03,600 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [613482309] [2020-10-14 18:10:03,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:10:03,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:10:03,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:03,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:03,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:04,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:06,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:06,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:07,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:07,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:08,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:08,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:10:08,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-14 18:10:08,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-14 18:10:08,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 18:10:08,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:10:08,616 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:10:08,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-14 18:10:08,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:10:08,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-14 18:10:08,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:10:10,471 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 62 [2020-10-14 18:10:10,701 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 67 [2020-10-14 18:10:11,118 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 74 [2020-10-14 18:10:11,439 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 71 [2020-10-14 18:10:11,686 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2020-10-14 18:10:11,984 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 65 [2020-10-14 18:10:12,187 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 46 [2020-10-14 18:10:12,416 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 48 [2020-10-14 18:10:12,615 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 42 [2020-10-14 18:10:12,874 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 51 [2020-10-14 18:10:13,078 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2020-10-14 18:10:13,272 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 39 [2020-10-14 18:10:14,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:10:14,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:10:14,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:14,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:10:14,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:10:14,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:10:14,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:10:14,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:10:14,578 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:10:14,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:10:14,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:10:14,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:10:14,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:10:14,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:10:14,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:10:14,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:14,580 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:10:14,580 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:10:14,580 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:10:14,580 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:10:14,581 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:10:14,581 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:10:14,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:10:14,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:10:14,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:10:14,581 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:10:14,636 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 0 proven. 262 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:10:14,636 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [613482309] [2020-10-14 18:10:14,637 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:10:14,637 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-14 18:10:14,637 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408822043] [2020-10-14 18:10:14,637 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-14 18:10:14,637 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:10:14,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-14 18:10:14,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=2004, Unknown=0, NotChecked=0, Total=2162 [2020-10-14 18:10:14,639 INFO L87 Difference]: Start difference. First operand 79 states and 81 transitions. Second operand 47 states. [2020-10-14 18:10:16,957 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 51 [2020-10-14 18:10:17,206 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 58 [2020-10-14 18:10:18,871 WARN L193 SmtUtils]: Spent 1.43 s on a formula simplification. DAG size of input: 168 DAG size of output: 158 [2020-10-14 18:10:19,475 WARN L193 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 60 [2020-10-14 18:10:19,791 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 65 [2020-10-14 18:10:20,175 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 66 [2020-10-14 18:10:20,674 WARN L193 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 61 [2020-10-14 18:10:21,223 WARN L193 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 71 [2020-10-14 18:10:21,801 WARN L193 SmtUtils]: Spent 416.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 75 [2020-10-14 18:10:23,316 WARN L193 SmtUtils]: Spent 1.37 s on a formula simplification. DAG size of input: 188 DAG size of output: 165 [2020-10-14 18:10:24,352 WARN L193 SmtUtils]: Spent 863.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 146 [2020-10-14 18:10:25,378 WARN L193 SmtUtils]: Spent 921.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 122 [2020-10-14 18:10:26,326 WARN L193 SmtUtils]: Spent 841.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 140 [2020-10-14 18:10:27,070 WARN L193 SmtUtils]: Spent 607.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 127 [2020-10-14 18:10:27,837 WARN L193 SmtUtils]: Spent 660.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 110 [2020-10-14 18:10:28,629 WARN L193 SmtUtils]: Spent 670.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 128 [2020-10-14 18:10:29,333 WARN L193 SmtUtils]: Spent 566.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 123 [2020-10-14 18:10:29,824 WARN L193 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 99 [2020-10-14 18:10:30,546 WARN L193 SmtUtils]: Spent 606.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 119 [2020-10-14 18:10:31,224 WARN L193 SmtUtils]: Spent 546.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 116 [2020-10-14 18:10:31,470 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-14 18:10:32,151 WARN L193 SmtUtils]: Spent 556.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 112 [2020-10-14 18:10:32,774 WARN L193 SmtUtils]: Spent 492.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 104 [2020-10-14 18:10:33,009 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-10-14 18:10:33,587 WARN L193 SmtUtils]: Spent 444.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 103 [2020-10-14 18:10:34,144 WARN L193 SmtUtils]: Spent 407.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 96 [2020-10-14 18:10:34,405 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 70 [2020-10-14 18:10:34,862 WARN L193 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 89 [2020-10-14 18:10:35,354 WARN L193 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 85 [2020-10-14 18:10:37,316 WARN L193 SmtUtils]: Spent 1.68 s on a formula simplification. DAG size of input: 160 DAG size of output: 146 [2020-10-14 18:10:37,791 WARN L193 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 84 [2020-10-14 18:10:39,594 WARN L193 SmtUtils]: Spent 1.69 s on a formula simplification. DAG size of input: 162 DAG size of output: 148 [2020-10-14 18:10:40,074 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 77 [2020-10-14 18:10:41,660 WARN L193 SmtUtils]: Spent 1.21 s on a formula simplification. DAG size of input: 159 DAG size of output: 149 [2020-10-14 18:10:41,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:10:41,798 INFO L93 Difference]: Finished difference Result 127 states and 133 transitions. [2020-10-14 18:10:41,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-10-14 18:10:41,798 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 78 [2020-10-14 18:10:41,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:10:41,800 INFO L225 Difference]: With dead ends: 127 [2020-10-14 18:10:41,801 INFO L226 Difference]: Without dead ends: 121 [2020-10-14 18:10:41,803 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2308 ImplicationChecksByTransitivity, 30.7s TimeCoverageRelationStatistics Valid=1039, Invalid=8663, Unknown=0, NotChecked=0, Total=9702 [2020-10-14 18:10:41,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-14 18:10:41,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 117. [2020-10-14 18:10:41,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-14 18:10:41,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 123 transitions. [2020-10-14 18:10:41,817 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 123 transitions. Word has length 78 [2020-10-14 18:10:41,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:10:41,818 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 123 transitions. [2020-10-14 18:10:41,818 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-14 18:10:41,818 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 123 transitions. [2020-10-14 18:10:41,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-14 18:10:41,818 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:10:41,819 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 9, 9, 9, 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 18:10:41,819 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-14 18:10:41,819 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:10:41,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:10:41,819 INFO L82 PathProgramCache]: Analyzing trace with hash 784732632, now seen corresponding path program 18 times [2020-10-14 18:10:41,819 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:10:41,819 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [122308430] [2020-10-14 18:10:41,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:10:41,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:10:41,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:41,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:41,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:42,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:42,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:42,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:42,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:43,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:43,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:44,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:44,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:44,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:44,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:44,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:44,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:44,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:44,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:45,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:45,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:45,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:46,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:46,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:46,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:46,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:10:46,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-14 18:10:46,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 23 [2020-10-14 18:10:46,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-14 18:10:46,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:10:46,837 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:10:46,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-14 18:10:46,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:10:46,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-14 18:10:46,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:10:47,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:10:47,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:10:47,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:47,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:10:47,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:10:47,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:10:47,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:10:47,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:10:47,178 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:10:47,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:10:47,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:10:47,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:10:47,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:10:47,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:10:47,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:10:47,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:47,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:10:47,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:10:47,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:10:47,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:10:47,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:10:47,182 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:10:47,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:10:47,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:10:47,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:10:47,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:10:47,189 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 148 proven. 142 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-14 18:10:47,190 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [122308430] [2020-10-14 18:10:47,190 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:10:47,190 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-14 18:10:47,190 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357263784] [2020-10-14 18:10:47,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-14 18:10:47,191 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:10:47,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-14 18:10:47,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=415, Unknown=0, NotChecked=0, Total=552 [2020-10-14 18:10:47,191 INFO L87 Difference]: Start difference. First operand 117 states and 123 transitions. Second operand 24 states. [2020-10-14 18:10:47,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:10:47,824 INFO L93 Difference]: Finished difference Result 153 states and 159 transitions. [2020-10-14 18:10:47,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-14 18:10:47,825 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 81 [2020-10-14 18:10:47,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:10:47,826 INFO L225 Difference]: With dead ends: 153 [2020-10-14 18:10:47,827 INFO L226 Difference]: Without dead ends: 86 [2020-10-14 18:10:47,828 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=258, Invalid=864, Unknown=0, NotChecked=0, Total=1122 [2020-10-14 18:10:47,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-14 18:10:47,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 82. [2020-10-14 18:10:47,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-14 18:10:47,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2020-10-14 18:10:47,836 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 81 [2020-10-14 18:10:47,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:10:47,836 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2020-10-14 18:10:47,836 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-14 18:10:47,837 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2020-10-14 18:10:47,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-14 18:10:47,837 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:10:47,837 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 9, 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 18:10:47,838 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-14 18:10:47,838 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:10:47,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:10:47,838 INFO L82 PathProgramCache]: Analyzing trace with hash 247838429, now seen corresponding path program 19 times [2020-10-14 18:10:47,838 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:10:47,839 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1693833884] [2020-10-14 18:10:47,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:10:47,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:10:47,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:48,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:48,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:50,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:50,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:51,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:52,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:52,903 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:10:52,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-14 18:10:52,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 18:10:52,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5050 [2020-10-14 18:10:52,904 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:10:52,904 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:10:52,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-14 18:10:52,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:10:52,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-14 18:10:52,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:10:57,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:10:57,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:10:57,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:57,550 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:10:57,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:10:57,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:10:57,551 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:10:57,551 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:10:57,551 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:10:57,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:10:57,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:10:57,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:10:57,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:10:57,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:10:57,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:10:57,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:10:57,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:10:57,553 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:10:57,553 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:10:57,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:10:57,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:10:57,554 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:10:57,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:10:57,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:10:57,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:10:57,554 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:10:57,610 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 0 proven. 290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:10:57,611 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1693833884] [2020-10-14 18:10:57,611 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:10:57,611 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-14 18:10:57,611 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895684217] [2020-10-14 18:10:57,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-14 18:10:57,612 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:10:57,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-14 18:10:57,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1785, Unknown=0, NotChecked=0, Total=1980 [2020-10-14 18:10:57,612 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand 45 states. [2020-10-14 18:10:59,242 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2020-10-14 18:10:59,913 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 57 [2020-10-14 18:11:00,183 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 58 [2020-10-14 18:11:00,453 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 64 [2020-10-14 18:11:00,766 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 69 [2020-10-14 18:11:01,017 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 64 [2020-10-14 18:11:01,308 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 63 [2020-10-14 18:11:01,566 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 59 [2020-10-14 18:11:01,851 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 61 [2020-10-14 18:11:02,085 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 64 [2020-10-14 18:11:02,355 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 63 [2020-10-14 18:11:02,590 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 68 [2020-10-14 18:11:02,879 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 69 [2020-10-14 18:11:03,119 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 65 [2020-10-14 18:11:03,356 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 62 [2020-10-14 18:11:03,829 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2020-10-14 18:11:04,072 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 61 [2020-10-14 18:11:04,379 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 62 [2020-10-14 18:11:05,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:11:05,129 INFO L93 Difference]: Finished difference Result 127 states and 133 transitions. [2020-10-14 18:11:05,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-14 18:11:05,134 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 81 [2020-10-14 18:11:05,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:11:05,136 INFO L225 Difference]: With dead ends: 127 [2020-10-14 18:11:05,136 INFO L226 Difference]: Without dead ends: 88 [2020-10-14 18:11:05,138 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 861 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=495, Invalid=4197, Unknown=0, NotChecked=0, Total=4692 [2020-10-14 18:11:05,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-14 18:11:05,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 85. [2020-10-14 18:11:05,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-14 18:11:05,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 87 transitions. [2020-10-14 18:11:05,145 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 87 transitions. Word has length 81 [2020-10-14 18:11:05,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:11:05,146 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 87 transitions. [2020-10-14 18:11:05,146 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-14 18:11:05,146 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 87 transitions. [2020-10-14 18:11:05,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-14 18:11:05,147 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:11:05,147 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 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 18:11:05,147 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-14 18:11:05,147 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:11:05,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:11:05,147 INFO L82 PathProgramCache]: Analyzing trace with hash 1173070962, now seen corresponding path program 20 times [2020-10-14 18:11:05,148 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:11:05,148 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1073719975] [2020-10-14 18:11:05,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:11:05,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:11:05,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:05,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:05,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:05,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:05,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:05,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:06,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:06,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:06,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:06,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:09,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:10,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:11:10,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-14 18:11:10,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-14 18:11:10,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-14 18:11:10,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:11:10,165 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:11:10,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-14 18:11:10,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:11:10,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-14 18:11:10,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:11:10,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:11:10,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:11:10,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:10,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:11:10,604 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:11:10,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:11:10,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:11:10,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:11:10,605 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:11:10,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:11:10,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:11:10,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:11:10,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:11:10,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:11:10,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:11:10,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:10,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:11:10,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:11:10,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:11:10,608 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:11:10,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:11:10,608 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:11:10,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:11:10,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:11:10,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:11:10,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:11:10,615 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 176 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:11:10,616 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1073719975] [2020-10-14 18:11:10,616 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:11:10,616 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-14 18:11:10,616 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058363466] [2020-10-14 18:11:10,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-14 18:11:10,617 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:11:10,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-14 18:11:10,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=491, Unknown=0, NotChecked=0, Total=650 [2020-10-14 18:11:10,618 INFO L87 Difference]: Start difference. First operand 85 states and 87 transitions. Second operand 26 states. [2020-10-14 18:11:11,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:11:11,426 INFO L93 Difference]: Finished difference Result 162 states and 167 transitions. [2020-10-14 18:11:11,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-14 18:11:11,427 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 84 [2020-10-14 18:11:11,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:11:11,428 INFO L225 Difference]: With dead ends: 162 [2020-10-14 18:11:11,429 INFO L226 Difference]: Without dead ends: 92 [2020-10-14 18:11:11,430 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=328, Invalid=1078, Unknown=0, NotChecked=0, Total=1406 [2020-10-14 18:11:11,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-14 18:11:11,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 88. [2020-10-14 18:11:11,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-14 18:11:11,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 90 transitions. [2020-10-14 18:11:11,438 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 90 transitions. Word has length 84 [2020-10-14 18:11:11,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:11:11,439 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 90 transitions. [2020-10-14 18:11:11,439 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-14 18:11:11,439 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 90 transitions. [2020-10-14 18:11:11,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-14 18:11:11,440 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:11:11,440 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 10, 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 18:11:11,440 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-14 18:11:11,440 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:11:11,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:11:11,441 INFO L82 PathProgramCache]: Analyzing trace with hash -481635432, now seen corresponding path program 21 times [2020-10-14 18:11:11,441 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:11:11,441 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [662134239] [2020-10-14 18:11:11,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:11:11,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:11:11,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:12,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:12,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:13,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:14,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:15,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:16,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:11:16,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-14 18:11:16,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 18:11:16,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 18:11:16,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:11:16,487 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:11:16,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-14 18:11:16,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:11:16,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-14 18:11:16,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:11:18,015 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2020-10-14 18:11:18,170 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2020-10-14 18:11:18,639 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2020-10-14 18:11:18,810 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2020-10-14 18:11:19,370 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 61 [2020-10-14 18:11:22,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:11:22,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:11:22,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:22,863 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:11:22,863 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:11:22,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:11:22,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:11:22,864 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:11:22,864 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:11:22,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:11:22,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:11:22,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:11:22,864 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:11:22,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:11:22,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:11:22,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:22,867 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:11:22,867 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:11:22,867 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:11:22,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:11:22,868 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:11:22,868 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:11:22,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:11:22,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:11:22,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:11:22,868 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:11:22,946 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 0 proven. 352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:11:22,946 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [662134239] [2020-10-14 18:11:22,947 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:11:22,947 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-14 18:11:22,947 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264662341] [2020-10-14 18:11:22,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-14 18:11:22,947 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:11:22,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-14 18:11:22,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=2111, Unknown=0, NotChecked=0, Total=2352 [2020-10-14 18:11:22,949 INFO L87 Difference]: Start difference. First operand 88 states and 90 transitions. Second operand 49 states. [2020-10-14 18:11:25,738 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 58 [2020-10-14 18:11:26,667 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 59 [2020-10-14 18:11:26,918 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 63 [2020-10-14 18:11:27,240 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 62 [2020-10-14 18:11:27,547 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 67 [2020-10-14 18:11:27,820 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 68 [2020-10-14 18:11:28,189 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 67 [2020-10-14 18:11:28,473 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 63 [2020-10-14 18:11:28,742 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 64 [2020-10-14 18:11:29,067 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 63 [2020-10-14 18:11:29,388 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 68 [2020-10-14 18:11:29,688 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 70 [2020-10-14 18:11:30,025 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 64 [2020-10-14 18:11:30,374 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 66 [2020-10-14 18:11:30,713 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 68 [2020-10-14 18:11:31,056 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 63 [2020-10-14 18:11:31,418 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 71 [2020-10-14 18:11:31,801 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 73 [2020-10-14 18:11:32,134 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 66 [2020-10-14 18:11:32,471 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 71 [2020-10-14 18:11:32,779 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 73 [2020-10-14 18:11:33,102 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 67 [2020-10-14 18:11:33,393 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 67 [2020-10-14 18:11:33,666 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 69 [2020-10-14 18:11:33,985 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 66 [2020-10-14 18:11:34,320 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 67 [2020-10-14 18:11:34,615 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 69 [2020-10-14 18:11:34,907 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 67 [2020-10-14 18:11:35,232 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 63 [2020-10-14 18:11:35,524 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 65 [2020-10-14 18:11:35,869 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 64 [2020-10-14 18:11:36,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:11:36,890 INFO L93 Difference]: Finished difference Result 136 states and 142 transitions. [2020-10-14 18:11:36,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-10-14 18:11:36,891 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 87 [2020-10-14 18:11:36,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:11:36,892 INFO L225 Difference]: With dead ends: 136 [2020-10-14 18:11:36,892 INFO L226 Difference]: Without dead ends: 94 [2020-10-14 18:11:36,894 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1462 ImplicationChecksByTransitivity, 14.6s TimeCoverageRelationStatistics Valid=762, Invalid=6378, Unknown=0, NotChecked=0, Total=7140 [2020-10-14 18:11:36,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-14 18:11:36,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 91. [2020-10-14 18:11:36,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-14 18:11:36,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 93 transitions. [2020-10-14 18:11:36,902 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 93 transitions. Word has length 87 [2020-10-14 18:11:36,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:11:36,903 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 93 transitions. [2020-10-14 18:11:36,903 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-14 18:11:36,903 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 93 transitions. [2020-10-14 18:11:36,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-14 18:11:36,904 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:11:36,904 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 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 18:11:36,904 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-14 18:11:36,904 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:11:36,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:11:36,904 INFO L82 PathProgramCache]: Analyzing trace with hash 1951795671, now seen corresponding path program 22 times [2020-10-14 18:11:36,904 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:11:36,904 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [820671268] [2020-10-14 18:11:36,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:11:36,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:11:36,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:37,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:37,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:37,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:37,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:37,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:38,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:39,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:39,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:39,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:39,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:41,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:41,922 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:11:41,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-14 18:11:41,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-14 18:11:41,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-14 18:11:41,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:11:41,922 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:11:41,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-14 18:11:41,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:11:41,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-14 18:11:41,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:11:42,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:11:42,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:11:42,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:42,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:11:42,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:11:42,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:11:42,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:11:42,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:11:42,532 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:11:42,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:11:42,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:11:42,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:11:42,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:11:42,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-14 18:11:42,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:11:42,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:42,535 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:11:42,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:11:42,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:11:42,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:11:42,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:11:42,535 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:11:42,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:11:42,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:11:42,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:11:42,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:11:42,543 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 210 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:11:42,544 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [820671268] [2020-10-14 18:11:42,544 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:11:42,544 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-14 18:11:42,544 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315351688] [2020-10-14 18:11:42,544 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-14 18:11:42,544 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:11:42,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-14 18:11:42,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=571, Unknown=0, NotChecked=0, Total=756 [2020-10-14 18:11:42,545 INFO L87 Difference]: Start difference. First operand 91 states and 93 transitions. Second operand 28 states. [2020-10-14 18:11:43,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:11:43,533 INFO L93 Difference]: Finished difference Result 174 states and 179 transitions. [2020-10-14 18:11:43,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-14 18:11:43,534 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 90 [2020-10-14 18:11:43,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:11:43,536 INFO L225 Difference]: With dead ends: 174 [2020-10-14 18:11:43,536 INFO L226 Difference]: Without dead ends: 98 [2020-10-14 18:11:43,537 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=381, Invalid=1259, Unknown=0, NotChecked=0, Total=1640 [2020-10-14 18:11:43,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-14 18:11:43,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 94. [2020-10-14 18:11:43,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-14 18:11:43,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 96 transitions. [2020-10-14 18:11:43,546 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 96 transitions. Word has length 90 [2020-10-14 18:11:43,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:11:43,546 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 96 transitions. [2020-10-14 18:11:43,546 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-14 18:11:43,546 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 96 transitions. [2020-10-14 18:11:43,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-14 18:11:43,547 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:11:43,547 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 11, 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 18:11:43,548 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-14 18:11:43,548 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:11:43,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:11:43,548 INFO L82 PathProgramCache]: Analyzing trace with hash 1837286525, now seen corresponding path program 23 times [2020-10-14 18:11:43,548 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:11:43,549 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [846825] [2020-10-14 18:11:43,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:11:43,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:11:43,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:44,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:45,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:46,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:48,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:11:49,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:11:49,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-14 18:11:49,010 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 18:11:49,010 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5430 [2020-10-14 18:11:49,010 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:11:49,010 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:11:49,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 51 [2020-10-14 18:11:49,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 18:11:49,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-14 18:11:49,011 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:11:50,849 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2020-10-14 18:11:51,161 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51