/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-examples/standard_partition_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 18:03:25,764 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 18:03:25,767 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 18:03:25,809 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 18:03:25,810 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 18:03:25,817 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 18:03:25,819 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 18:03:25,823 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 18:03:25,825 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 18:03:25,828 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 18:03:25,829 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 18:03:25,830 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 18:03:25,830 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 18:03:25,832 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 18:03:25,835 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 18:03:25,837 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 18:03:25,839 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 18:03:25,840 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 18:03:25,841 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 18:03:25,849 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 18:03:25,851 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 18:03:25,852 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 18:03:25,853 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 18:03:25,854 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 18:03:25,866 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 18:03:25,866 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 18:03:25,867 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 18:03:25,873 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 18:03:25,873 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 18:03:25,874 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 18:03:25,874 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 18:03:25,875 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 18:03:25,879 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 18:03:25,880 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 18:03:25,880 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 18:03:25,881 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 18:03:25,884 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 18:03:25,884 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 18:03:25,884 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 18:03:25,885 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 18:03:25,885 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 18:03:25,887 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 18:03:25,923 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 18:03:25,923 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 18:03:25,926 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 18:03:25,926 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 18:03:25,926 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 18:03:25,927 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 18:03:25,927 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 18:03:25,927 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 18:03:25,927 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 18:03:25,927 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 18:03:25,928 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 18:03:25,929 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 18:03:25,929 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 18:03:25,929 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 18:03:25,929 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 18:03:25,930 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 18:03:25,930 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 18:03:25,930 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 18:03:25,930 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 18:03:25,930 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 18:03:25,931 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 18:03:25,931 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 18:03:25,931 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 18:03:25,931 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 18:03:25,932 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 18:03:25,932 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 18:03:25,932 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 18:03:25,932 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 18:03:25,932 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 18:03:25,933 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 18:03:26,221 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 18:03:26,237 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 18:03:26,243 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 18:03:26,245 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 18:03:26,245 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 18:03:26,246 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_partition_ground-1.i [2020-10-14 18:03:26,308 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2c03bbaae/f65c59f9805c4be4884055c06a530c43/FLAG0da5edb0a [2020-10-14 18:03:26,688 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 18:03:26,688 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_partition_ground-1.i [2020-10-14 18:03:26,693 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2c03bbaae/f65c59f9805c4be4884055c06a530c43/FLAG0da5edb0a [2020-10-14 18:03:27,119 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2c03bbaae/f65c59f9805c4be4884055c06a530c43 [2020-10-14 18:03:27,127 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 18:03:27,128 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 18:03:27,129 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 18:03:27,130 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 18:03:27,133 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 18:03:27,134 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 06:03:27" (1/1) ... [2020-10-14 18:03:27,137 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ac0f60a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:03:27, skipping insertion in model container [2020-10-14 18:03:27,137 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 06:03:27" (1/1) ... [2020-10-14 18:03:27,145 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 18:03:27,167 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 18:03:27,353 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 18:03:27,357 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 18:03:27,383 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 18:03:27,404 INFO L208 MainTranslator]: Completed translation [2020-10-14 18:03:27,404 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:03:27 WrapperNode [2020-10-14 18:03:27,404 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 18:03:27,405 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 18:03:27,405 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 18:03:27,405 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 18:03:27,522 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:03:27" (1/1) ... [2020-10-14 18:03:27,522 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:03:27" (1/1) ... [2020-10-14 18:03:27,533 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:03:27" (1/1) ... [2020-10-14 18:03:27,534 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:03:27" (1/1) ... [2020-10-14 18:03:27,558 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:03:27" (1/1) ... [2020-10-14 18:03:27,568 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:03:27" (1/1) ... [2020-10-14 18:03:27,574 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:03:27" (1/1) ... [2020-10-14 18:03:27,577 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 18:03:27,577 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 18:03:27,578 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 18:03:27,578 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 18:03:27,579 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:03:27" (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 18:03:27,639 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 18:03:27,639 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 18:03:27,640 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-14 18:03:27,640 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 18:03:27,640 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 18:03:27,640 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-14 18:03:27,640 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-14 18:03:27,640 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 18:03:27,641 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-14 18:03:27,641 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-14 18:03:27,641 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-14 18:03:27,641 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-14 18:03:27,641 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 18:03:27,641 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 18:03:27,936 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 18:03:27,936 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-14 18:03:27,941 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 06:03:27 BoogieIcfgContainer [2020-10-14 18:03:27,942 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 18:03:27,943 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 18:03:27,943 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 18:03:27,946 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 18:03:27,947 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 06:03:27" (1/3) ... [2020-10-14 18:03:27,948 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@282b3714 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 06:03:27, skipping insertion in model container [2020-10-14 18:03:27,948 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:03:27" (2/3) ... [2020-10-14 18:03:27,949 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@282b3714 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 06:03:27, skipping insertion in model container [2020-10-14 18:03:27,949 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 06:03:27" (3/3) ... [2020-10-14 18:03:27,951 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_partition_ground-1.i [2020-10-14 18:03:27,961 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 18:03:27,969 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 18:03:27,983 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 18:03:28,010 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 18:03:28,010 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 18:03:28,010 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 18:03:28,010 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 18:03:28,011 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 18:03:28,011 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 18:03:28,011 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 18:03:28,011 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 18:03:28,044 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2020-10-14 18:03:28,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-14 18:03:28,050 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:03:28,051 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:03:28,051 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:03:28,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:03:28,056 INFO L82 PathProgramCache]: Analyzing trace with hash -825680561, now seen corresponding path program 1 times [2020-10-14 18:03:28,063 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:03:28,064 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1687212342] [2020-10-14 18:03:28,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:03:28,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:03:28,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:28,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:28,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:28,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:03:28,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-14 18:03:28,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 18:03:28,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 461 [2020-10-14 18:03:28,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:03:28,637 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:03:28,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 18:03:28,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:03:28,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:03:28,639 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-14 18:03:28,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:03:28,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:03:28,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:28,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:03:28,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:03:28,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:03:28,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 18:03:28,769 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:03:28,769 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:03:28,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:03:28,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:03:28,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:03:28,770 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:03:28,778 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 18:03:28,779 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1687212342] [2020-10-14 18:03:28,781 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 18:03:28,782 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 18:03:28,783 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519369977] [2020-10-14 18:03:28,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 18:03:28,789 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:03:28,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 18:03:28,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-14 18:03:28,806 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 5 states. [2020-10-14 18:03:28,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:03:28,961 INFO L93 Difference]: Finished difference Result 76 states and 109 transitions. [2020-10-14 18:03:28,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 18:03:28,963 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-10-14 18:03:28,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:03:28,975 INFO L225 Difference]: With dead ends: 76 [2020-10-14 18:03:28,975 INFO L226 Difference]: Without dead ends: 43 [2020-10-14 18:03:28,979 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-14 18:03:28,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-14 18:03:29,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2020-10-14 18:03:29,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-14 18:03:29,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 48 transitions. [2020-10-14 18:03:29,034 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 48 transitions. Word has length 15 [2020-10-14 18:03:29,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:03:29,034 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 48 transitions. [2020-10-14 18:03:29,035 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 18:03:29,035 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 48 transitions. [2020-10-14 18:03:29,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-14 18:03:29,036 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:03:29,036 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:03:29,037 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 18:03:29,037 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:03:29,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:03:29,038 INFO L82 PathProgramCache]: Analyzing trace with hash 947936744, now seen corresponding path program 1 times [2020-10-14 18:03:29,038 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:03:29,039 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1705253266] [2020-10-14 18:03:29,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:03:29,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:03:29,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:29,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:29,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:29,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:03:29,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-14 18:03:29,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 18:03:29,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 354 [2020-10-14 18:03:29,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:03:29,410 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:03:29,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 18:03:29,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:03:29,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 18:03:29,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:03:29,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:03:29,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:03:29,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:29,470 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:03:29,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:03:29,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:03:29,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 18:03:29,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:03:29,472 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:03:29,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:03:29,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:03:29,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:03:29,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:03:29,476 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 18:03:29,477 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1705253266] [2020-10-14 18:03:29,477 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 18:03:29,477 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 18:03:29,477 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270322586] [2020-10-14 18:03:29,479 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 18:03:29,480 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:03:29,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 18:03:29,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-14 18:03:29,481 INFO L87 Difference]: Start difference. First operand 38 states and 48 transitions. Second operand 5 states. [2020-10-14 18:03:29,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:03:29,571 INFO L93 Difference]: Finished difference Result 63 states and 79 transitions. [2020-10-14 18:03:29,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 18:03:29,572 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-10-14 18:03:29,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:03:29,574 INFO L225 Difference]: With dead ends: 63 [2020-10-14 18:03:29,574 INFO L226 Difference]: Without dead ends: 49 [2020-10-14 18:03:29,576 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-14 18:03:29,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-14 18:03:29,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-10-14 18:03:29,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-14 18:03:29,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 63 transitions. [2020-10-14 18:03:29,587 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 63 transitions. Word has length 17 [2020-10-14 18:03:29,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:03:29,588 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 63 transitions. [2020-10-14 18:03:29,588 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 18:03:29,588 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 63 transitions. [2020-10-14 18:03:29,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-14 18:03:29,589 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:03:29,589 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:03:29,590 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 18:03:29,590 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:03:29,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:03:29,590 INFO L82 PathProgramCache]: Analyzing trace with hash -309319642, now seen corresponding path program 1 times [2020-10-14 18:03:29,591 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:03:29,591 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [513642115] [2020-10-14 18:03:29,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:03:29,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:03:29,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:29,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:29,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:29,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:03:29,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-14 18:03:29,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 18:03:29,941 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 336 [2020-10-14 18:03:29,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:03:29,941 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:03:29,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 18:03:29,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:03:29,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-14 18:03:29,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:03:30,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:03:30,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:03:30,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:30,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:03:30,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:03:30,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:03:30,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:03:30,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:03:30,110 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:03:30,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:03:30,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:03:30,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:03:30,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:03:30,115 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:03:30,115 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [513642115] [2020-10-14 18:03:30,115 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:03:30,116 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 18:03:30,116 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395769677] [2020-10-14 18:03:30,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 18:03:30,117 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:03:30,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 18:03:30,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-14 18:03:30,118 INFO L87 Difference]: Start difference. First operand 49 states and 63 transitions. Second operand 10 states. [2020-10-14 18:03:30,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:03:30,399 INFO L93 Difference]: Finished difference Result 75 states and 94 transitions. [2020-10-14 18:03:30,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 18:03:30,400 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2020-10-14 18:03:30,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:03:30,402 INFO L225 Difference]: With dead ends: 75 [2020-10-14 18:03:30,403 INFO L226 Difference]: Without dead ends: 73 [2020-10-14 18:03:30,404 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2020-10-14 18:03:30,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-14 18:03:30,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 62. [2020-10-14 18:03:30,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-14 18:03:30,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 79 transitions. [2020-10-14 18:03:30,418 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 79 transitions. Word has length 18 [2020-10-14 18:03:30,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:03:30,418 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 79 transitions. [2020-10-14 18:03:30,418 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 18:03:30,418 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 79 transitions. [2020-10-14 18:03:30,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-14 18:03:30,420 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:03:30,420 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] [2020-10-14 18:03:30,420 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 18:03:30,421 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:03:30,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:03:30,421 INFO L82 PathProgramCache]: Analyzing trace with hash 181553840, now seen corresponding path program 1 times [2020-10-14 18:03:30,421 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:03:30,422 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1768423368] [2020-10-14 18:03:30,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:03:30,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:03:30,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:30,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:30,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:03:30,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-14 18:03:30,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:03:30,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 82 [2020-10-14 18:03:30,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:03:30,514 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:03:30,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 18:03:30,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:03:30,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-14 18:03:30,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:03:30,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:03:30,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:03:30,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:30,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:03:30,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:03:30,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:03:30,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:03:30,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:03:30,546 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:03:30,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:03:30,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:03:30,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:03:30,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:03:30,549 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:03:30,550 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1768423368] [2020-10-14 18:03:30,550 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:03:30,550 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 18:03:30,550 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613806817] [2020-10-14 18:03:30,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 18:03:30,551 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:03:30,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 18:03:30,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-14 18:03:30,552 INFO L87 Difference]: Start difference. First operand 62 states and 79 transitions. Second operand 5 states. [2020-10-14 18:03:30,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:03:30,664 INFO L93 Difference]: Finished difference Result 143 states and 190 transitions. [2020-10-14 18:03:30,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 18:03:30,664 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-10-14 18:03:30,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:03:30,667 INFO L225 Difference]: With dead ends: 143 [2020-10-14 18:03:30,668 INFO L226 Difference]: Without dead ends: 99 [2020-10-14 18:03:30,669 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-14 18:03:30,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-14 18:03:30,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 82. [2020-10-14 18:03:30,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-14 18:03:30,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 103 transitions. [2020-10-14 18:03:30,682 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 103 transitions. Word has length 20 [2020-10-14 18:03:30,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:03:30,682 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 103 transitions. [2020-10-14 18:03:30,682 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 18:03:30,682 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 103 transitions. [2020-10-14 18:03:30,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-14 18:03:30,684 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:03:30,684 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:03:30,684 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 18:03:30,684 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:03:30,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:03:30,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1590841348, now seen corresponding path program 1 times [2020-10-14 18:03:30,685 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:03:30,685 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1398446817] [2020-10-14 18:03:30,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:03:30,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:03:30,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:30,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:31,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:31,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:32,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:33,902 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:03:33,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-14 18:03:33,902 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 18:03:33,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3201 [2020-10-14 18:03:33,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:03:33,903 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:03:33,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 18:03:33,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:03:33,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-14 18:03:33,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:03:34,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:03:34,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:03:34,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:34,251 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:03:34,252 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:03:34,252 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:03:34,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:03:34,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:03:34,254 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:03:34,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:03:34,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:03:34,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:03:34,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:03:34,262 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 18:03:34,262 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1398446817] [2020-10-14 18:03:34,262 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:03:34,263 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 18:03:34,263 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782492387] [2020-10-14 18:03:34,264 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 18:03:34,264 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:03:34,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 18:03:34,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-10-14 18:03:34,265 INFO L87 Difference]: Start difference. First operand 82 states and 103 transitions. Second operand 13 states. [2020-10-14 18:03:34,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:03:34,993 INFO L93 Difference]: Finished difference Result 188 states and 240 transitions. [2020-10-14 18:03:34,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 18:03:34,994 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 27 [2020-10-14 18:03:34,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:03:34,996 INFO L225 Difference]: With dead ends: 188 [2020-10-14 18:03:34,996 INFO L226 Difference]: Without dead ends: 186 [2020-10-14 18:03:34,997 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2020-10-14 18:03:34,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-14 18:03:35,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 110. [2020-10-14 18:03:35,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-14 18:03:35,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 141 transitions. [2020-10-14 18:03:35,017 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 141 transitions. Word has length 27 [2020-10-14 18:03:35,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:03:35,017 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 141 transitions. [2020-10-14 18:03:35,017 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 18:03:35,017 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 141 transitions. [2020-10-14 18:03:35,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-14 18:03:35,019 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:03:35,019 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:03:35,020 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 18:03:35,020 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:03:35,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:03:35,020 INFO L82 PathProgramCache]: Analyzing trace with hash 1356555688, now seen corresponding path program 1 times [2020-10-14 18:03:35,021 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:03:35,021 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1176599052] [2020-10-14 18:03:35,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:03:35,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:03:35,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:35,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:35,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:36,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:03:36,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-14 18:03:36,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 18:03:36,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1606 [2020-10-14 18:03:36,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:03:36,641 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:03:36,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 18:03:36,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:03:36,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 18:03:36,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-14 18:03:36,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:03:36,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:03:36,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:36,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:03:36,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:03:36,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:03:36,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:03:36,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:03:36,711 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:03:36,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:03:36,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:03:36,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:03:36,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:03:36,718 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-14 18:03:36,719 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1176599052] [2020-10-14 18:03:36,719 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 18:03:36,721 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-14 18:03:36,722 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269237009] [2020-10-14 18:03:36,723 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 18:03:36,723 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:03:36,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 18:03:36,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-14 18:03:36,725 INFO L87 Difference]: Start difference. First operand 110 states and 141 transitions. Second operand 7 states. [2020-10-14 18:03:36,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:03:36,901 INFO L93 Difference]: Finished difference Result 170 states and 218 transitions. [2020-10-14 18:03:36,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 18:03:36,902 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2020-10-14 18:03:36,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:03:36,904 INFO L225 Difference]: With dead ends: 170 [2020-10-14 18:03:36,904 INFO L226 Difference]: Without dead ends: 159 [2020-10-14 18:03:36,905 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-14 18:03:36,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-14 18:03:36,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 126. [2020-10-14 18:03:36,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-14 18:03:36,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 162 transitions. [2020-10-14 18:03:36,941 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 162 transitions. Word has length 29 [2020-10-14 18:03:36,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:03:36,942 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 162 transitions. [2020-10-14 18:03:36,942 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 18:03:36,942 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 162 transitions. [2020-10-14 18:03:36,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-14 18:03:36,946 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:03:36,947 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] [2020-10-14 18:03:36,947 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 18:03:36,950 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:03:36,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:03:36,951 INFO L82 PathProgramCache]: Analyzing trace with hash -332388054, now seen corresponding path program 1 times [2020-10-14 18:03:36,951 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:03:36,951 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1737029073] [2020-10-14 18:03:36,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:03:36,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:03:36,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:36,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:37,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:37,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:37,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:40,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:03:40,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-14 18:03:40,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 18:03:40,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3417 [2020-10-14 18:03:40,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:03:40,389 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:03:40,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 18:03:40,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:03:40,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 18:03:40,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:03:40,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:03:40,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:03:40,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:40,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:03:40,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:03:40,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:03:40,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:03:40,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:03:40,438 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:03:40,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:03:40,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:03:40,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:03:40,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:03:40,442 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-14 18:03:40,442 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1737029073] [2020-10-14 18:03:40,443 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:03:40,443 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 18:03:40,443 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781005139] [2020-10-14 18:03:40,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 18:03:40,444 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:03:40,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 18:03:40,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 18:03:40,445 INFO L87 Difference]: Start difference. First operand 126 states and 162 transitions. Second operand 6 states. [2020-10-14 18:03:40,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:03:40,607 INFO L93 Difference]: Finished difference Result 147 states and 185 transitions. [2020-10-14 18:03:40,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 18:03:40,608 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2020-10-14 18:03:40,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:03:40,609 INFO L225 Difference]: With dead ends: 147 [2020-10-14 18:03:40,609 INFO L226 Difference]: Without dead ends: 136 [2020-10-14 18:03:40,611 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-14 18:03:40,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-14 18:03:40,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 111. [2020-10-14 18:03:40,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-14 18:03:40,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 141 transitions. [2020-10-14 18:03:40,634 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 141 transitions. Word has length 29 [2020-10-14 18:03:40,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:03:40,635 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 141 transitions. [2020-10-14 18:03:40,635 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 18:03:40,635 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 141 transitions. [2020-10-14 18:03:40,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-14 18:03:40,639 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:03:40,639 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:03:40,639 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 18:03:40,639 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:03:40,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:03:40,640 INFO L82 PathProgramCache]: Analyzing trace with hash -113533336, now seen corresponding path program 1 times [2020-10-14 18:03:40,640 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:03:40,641 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [78485007] [2020-10-14 18:03:40,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:03:40,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:03:40,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:40,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:40,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:40,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:40,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:41,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:41,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:41,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:41,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:42,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:43,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:43,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:44,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:44,762 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:03:44,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-14 18:03:44,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-14 18:03:44,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4106 [2020-10-14 18:03:44,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:03:44,764 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:03:44,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 18:03:44,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:03:44,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-14 18:03:44,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:03:45,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:03:45,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:03:45,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:45,166 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:03:45,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:03:45,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:03:45,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:03:45,167 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:03:45,168 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:03:45,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:03:45,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:03:45,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:03:45,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 18:03:45,177 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 18:03:45,178 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [78485007] [2020-10-14 18:03:45,178 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:03:45,178 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 18:03:45,178 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518443397] [2020-10-14 18:03:45,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 18:03:45,179 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:03:45,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 18:03:45,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-10-14 18:03:45,180 INFO L87 Difference]: Start difference. First operand 111 states and 141 transitions. Second operand 14 states. [2020-10-14 18:03:45,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:03:45,876 INFO L93 Difference]: Finished difference Result 146 states and 183 transitions. [2020-10-14 18:03:45,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 18:03:45,877 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 29 [2020-10-14 18:03:45,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:03:45,879 INFO L225 Difference]: With dead ends: 146 [2020-10-14 18:03:45,879 INFO L226 Difference]: Without dead ends: 144 [2020-10-14 18:03:45,880 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2020-10-14 18:03:45,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-14 18:03:45,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 126. [2020-10-14 18:03:45,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-14 18:03:45,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 160 transitions. [2020-10-14 18:03:45,900 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 160 transitions. Word has length 29 [2020-10-14 18:03:45,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:03:45,901 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 160 transitions. [2020-10-14 18:03:45,901 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 18:03:45,902 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 160 transitions. [2020-10-14 18:03:45,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-14 18:03:45,902 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:03:45,903 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] [2020-10-14 18:03:45,903 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 18:03:45,903 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:03:45,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:03:45,904 INFO L82 PathProgramCache]: Analyzing trace with hash -1124650586, now seen corresponding path program 1 times [2020-10-14 18:03:45,904 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:03:45,904 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [197297648] [2020-10-14 18:03:45,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:03:45,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:03:45,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:45,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:45,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:46,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:46,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:46,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:03:46,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-14 18:03:46,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 18:03:46,667 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 751 [2020-10-14 18:03:46,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:03:46,667 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:03:46,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 18:03:46,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:03:46,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-14 18:03:46,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:03:46,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:03:46,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:03:46,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:46,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:03:46,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:03:46,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:03:46,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:03:46,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:03:46,950 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:03:46,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:03:46,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:03:46,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:03:46,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:03:46,956 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 18:03:46,961 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [197297648] [2020-10-14 18:03:46,962 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:03:46,962 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 18:03:46,962 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868273083] [2020-10-14 18:03:46,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 18:03:46,963 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:03:46,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 18:03:46,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-10-14 18:03:46,964 INFO L87 Difference]: Start difference. First operand 126 states and 160 transitions. Second operand 14 states. [2020-10-14 18:03:47,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:03:47,530 INFO L93 Difference]: Finished difference Result 194 states and 249 transitions. [2020-10-14 18:03:47,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 18:03:47,531 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 29 [2020-10-14 18:03:47,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:03:47,533 INFO L225 Difference]: With dead ends: 194 [2020-10-14 18:03:47,533 INFO L226 Difference]: Without dead ends: 192 [2020-10-14 18:03:47,534 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2020-10-14 18:03:47,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-14 18:03:47,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 154. [2020-10-14 18:03:47,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-14 18:03:47,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 201 transitions. [2020-10-14 18:03:47,555 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 201 transitions. Word has length 29 [2020-10-14 18:03:47,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:03:47,555 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 201 transitions. [2020-10-14 18:03:47,555 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 18:03:47,555 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 201 transitions. [2020-10-14 18:03:47,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-14 18:03:47,556 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:03:47,556 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:03:47,556 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 18:03:47,557 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:03:47,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:03:47,557 INFO L82 PathProgramCache]: Analyzing trace with hash -2080940826, now seen corresponding path program 2 times [2020-10-14 18:03:47,557 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:03:47,558 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [875615642] [2020-10-14 18:03:47,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:03:47,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:03:47,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:47,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:47,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:47,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:48,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:49,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:50,540 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:03:50,540 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-14 18:03:50,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 18:03:50,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2969 [2020-10-14 18:03:50,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:03:50,542 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:03:50,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 18:03:50,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:03:50,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-14 18:03:50,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:03:50,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:03:50,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:03:50,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:50,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:03:50,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:03:50,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:03:50,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:03:50,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:03:50,889 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:03:50,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:03:50,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:03:50,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:03:50,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:03:50,896 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 18:03:50,897 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [875615642] [2020-10-14 18:03:50,897 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:03:50,897 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 18:03:50,897 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001832123] [2020-10-14 18:03:50,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 18:03:50,898 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:03:50,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 18:03:50,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2020-10-14 18:03:50,899 INFO L87 Difference]: Start difference. First operand 154 states and 201 transitions. Second operand 14 states. [2020-10-14 18:03:51,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:03:51,265 INFO L93 Difference]: Finished difference Result 181 states and 232 transitions. [2020-10-14 18:03:51,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 18:03:51,266 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 30 [2020-10-14 18:03:51,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:03:51,268 INFO L225 Difference]: With dead ends: 181 [2020-10-14 18:03:51,268 INFO L226 Difference]: Without dead ends: 179 [2020-10-14 18:03:51,269 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-10-14 18:03:51,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-10-14 18:03:51,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 161. [2020-10-14 18:03:51,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-14 18:03:51,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 209 transitions. [2020-10-14 18:03:51,286 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 209 transitions. Word has length 30 [2020-10-14 18:03:51,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:03:51,286 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 209 transitions. [2020-10-14 18:03:51,286 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 18:03:51,287 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 209 transitions. [2020-10-14 18:03:51,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-14 18:03:51,287 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:03:51,288 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:03:51,288 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 18:03:51,288 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:03:51,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:03:51,288 INFO L82 PathProgramCache]: Analyzing trace with hash 1770601008, now seen corresponding path program 2 times [2020-10-14 18:03:51,289 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:03:51,289 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1159676321] [2020-10-14 18:03:51,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:03:51,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:03:51,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:51,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:51,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:51,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:51,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:52,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:52,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:53,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:53,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:55,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:55,216 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:03:55,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-14 18:03:55,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-14 18:03:55,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3919 [2020-10-14 18:03:55,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:03:55,216 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:03:55,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 18:03:55,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:03:55,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-14 18:03:55,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:03:55,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:03:55,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:03:55,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:55,598 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:03:55,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:03:55,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:03:55,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:03:55,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:03:55,598 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:03:55,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:03:55,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:03:55,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:03:55,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:03:55,606 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 18:03:55,606 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1159676321] [2020-10-14 18:03:55,606 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:03:55,606 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 18:03:55,607 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727811676] [2020-10-14 18:03:55,607 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 18:03:55,607 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:03:55,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 18:03:55,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2020-10-14 18:03:55,608 INFO L87 Difference]: Start difference. First operand 161 states and 209 transitions. Second operand 15 states. [2020-10-14 18:03:56,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:03:56,061 INFO L93 Difference]: Finished difference Result 194 states and 247 transitions. [2020-10-14 18:03:56,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 18:03:56,062 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 32 [2020-10-14 18:03:56,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:03:56,063 INFO L225 Difference]: With dead ends: 194 [2020-10-14 18:03:56,063 INFO L226 Difference]: Without dead ends: 192 [2020-10-14 18:03:56,064 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2020-10-14 18:03:56,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-14 18:03:56,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 161. [2020-10-14 18:03:56,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-14 18:03:56,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 209 transitions. [2020-10-14 18:03:56,081 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 209 transitions. Word has length 32 [2020-10-14 18:03:56,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:03:56,082 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 209 transitions. [2020-10-14 18:03:56,082 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 18:03:56,082 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 209 transitions. [2020-10-14 18:03:56,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-14 18:03:56,083 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:03:56,083 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] [2020-10-14 18:03:56,083 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 18:03:56,083 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:03:56,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:03:56,084 INFO L82 PathProgramCache]: Analyzing trace with hash 182253106, now seen corresponding path program 2 times [2020-10-14 18:03:56,084 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:03:56,084 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1775156450] [2020-10-14 18:03:56,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:03:56,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:03:56,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:56,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:56,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:56,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:56,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:56,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:56,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:56,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:57,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:03:57,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-14 18:03:57,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 18:03:57,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1257 [2020-10-14 18:03:57,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:03:57,349 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:03:57,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 18:03:57,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:03:57,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-14 18:03:57,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:03:57,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:03:57,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:03:57,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:57,734 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:03:57,735 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:03:57,735 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:03:57,735 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:03:57,735 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:03:57,735 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:03:57,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:03:57,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:03:57,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:03:57,736 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:03:57,743 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:03:57,744 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1775156450] [2020-10-14 18:03:57,744 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:03:57,744 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 18:03:57,744 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340381724] [2020-10-14 18:03:57,745 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 18:03:57,745 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:03:57,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 18:03:57,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2020-10-14 18:03:57,746 INFO L87 Difference]: Start difference. First operand 161 states and 209 transitions. Second operand 15 states. [2020-10-14 18:03:58,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:03:58,775 INFO L93 Difference]: Finished difference Result 223 states and 284 transitions. [2020-10-14 18:03:58,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-14 18:03:58,776 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 32 [2020-10-14 18:03:58,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:03:58,779 INFO L225 Difference]: With dead ends: 223 [2020-10-14 18:03:58,782 INFO L226 Difference]: Without dead ends: 221 [2020-10-14 18:03:58,783 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2020-10-14 18:03:58,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-10-14 18:03:58,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 167. [2020-10-14 18:03:58,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-14 18:03:58,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 219 transitions. [2020-10-14 18:03:58,811 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 219 transitions. Word has length 32 [2020-10-14 18:03:58,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:03:58,812 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 219 transitions. [2020-10-14 18:03:58,812 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 18:03:58,812 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 219 transitions. [2020-10-14 18:03:58,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-14 18:03:58,813 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:03:58,813 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] [2020-10-14 18:03:58,814 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 18:03:58,814 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:03:58,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:03:58,814 INFO L82 PathProgramCache]: Analyzing trace with hash -828864144, now seen corresponding path program 3 times [2020-10-14 18:03:58,815 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:03:58,815 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1668077248] [2020-10-14 18:03:58,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:03:58,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:03:58,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:58,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:58,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:59,166 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:03:59,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-14 18:03:59,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 18:03:59,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 344 [2020-10-14 18:03:59,167 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:03:59,167 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:03:59,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 18:03:59,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 18:03:59,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-14 18:03:59,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:03:59,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:03:59,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:03:59,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:59,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:03:59,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:03:59,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:03:59,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:03:59,257 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:03:59,257 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:03:59,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:03:59,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:03:59,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:03:59,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:03:59,261 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-14 18:03:59,261 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1668077248] [2020-10-14 18:03:59,261 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:03:59,261 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 18:03:59,262 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34927653] [2020-10-14 18:03:59,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 18:03:59,262 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:03:59,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 18:03:59,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-14 18:03:59,263 INFO L87 Difference]: Start difference. First operand 167 states and 219 transitions. Second operand 10 states. [2020-10-14 18:03:59,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:03:59,536 INFO L93 Difference]: Finished difference Result 254 states and 326 transitions. [2020-10-14 18:03:59,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 18:03:59,542 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 32 [2020-10-14 18:03:59,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:03:59,544 INFO L225 Difference]: With dead ends: 254 [2020-10-14 18:03:59,544 INFO L226 Difference]: Without dead ends: 207 [2020-10-14 18:03:59,545 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2020-10-14 18:03:59,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-14 18:03:59,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 191. [2020-10-14 18:03:59,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2020-10-14 18:03:59,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 250 transitions. [2020-10-14 18:03:59,589 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 250 transitions. Word has length 32 [2020-10-14 18:03:59,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:03:59,590 INFO L479 AbstractCegarLoop]: Abstraction has 191 states and 250 transitions. [2020-10-14 18:03:59,590 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 18:03:59,590 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 250 transitions. [2020-10-14 18:03:59,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-14 18:03:59,591 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:03:59,593 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:03:59,593 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 18:03:59,593 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:03:59,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:03:59,603 INFO L82 PathProgramCache]: Analyzing trace with hash 431674667, now seen corresponding path program 1 times [2020-10-14 18:03:59,603 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:03:59,603 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1899863920] [2020-10-14 18:03:59,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:03:59,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:03:59,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:59,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:59,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:03:59,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:00,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:04:00,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-14 18:04:00,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 18:04:00,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 879 [2020-10-14 18:04:00,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:04:00,492 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:04:00,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 18:04:00,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:04:00,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-14 18:04:00,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:04:00,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:04:00,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:04:00,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:00,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:04:00,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:04:00,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:04:00,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:04:00,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:04:00,731 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:04:00,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:04:00,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:04:00,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:04:00,731 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:04:00,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-14 18:04:00,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:04:00,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:00,735 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:04:00,735 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:04:00,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:04:00,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:04:00,736 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:04:00,736 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:04:00,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:04:00,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:04:00,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:04:00,736 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:04:00,742 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:04:00,742 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1899863920] [2020-10-14 18:04:00,742 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:04:00,742 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 18:04:00,743 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337553057] [2020-10-14 18:04:00,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 18:04:00,743 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:04:00,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 18:04:00,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-10-14 18:04:00,744 INFO L87 Difference]: Start difference. First operand 191 states and 250 transitions. Second operand 14 states. [2020-10-14 18:04:01,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:04:01,634 INFO L93 Difference]: Finished difference Result 276 states and 358 transitions. [2020-10-14 18:04:01,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-14 18:04:01,635 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 35 [2020-10-14 18:04:01,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:04:01,638 INFO L225 Difference]: With dead ends: 276 [2020-10-14 18:04:01,638 INFO L226 Difference]: Without dead ends: 274 [2020-10-14 18:04:01,639 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2020-10-14 18:04:01,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-10-14 18:04:01,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 210. [2020-10-14 18:04:01,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2020-10-14 18:04:01,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 276 transitions. [2020-10-14 18:04:01,666 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 276 transitions. Word has length 35 [2020-10-14 18:04:01,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:04:01,666 INFO L479 AbstractCegarLoop]: Abstraction has 210 states and 276 transitions. [2020-10-14 18:04:01,666 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 18:04:01,666 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 276 transitions. [2020-10-14 18:04:01,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-14 18:04:01,667 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:04:01,668 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:04:01,668 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 18:04:01,668 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:04:01,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:04:01,668 INFO L82 PathProgramCache]: Analyzing trace with hash 572223277, now seen corresponding path program 1 times [2020-10-14 18:04:01,669 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:04:01,669 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [217350430] [2020-10-14 18:04:01,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:04:01,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:04:01,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:01,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:01,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:01,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:01,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:03,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:04:03,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-14 18:04:03,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 18:04:03,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2008 [2020-10-14 18:04:03,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:04:03,686 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:04:03,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 18:04:03,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:04:03,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-14 18:04:03,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:04:03,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:04:03,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:04:03,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:03,722 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:04:03,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:04:03,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:04:03,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:04:03,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:04:03,723 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:04:03,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:04:03,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:04:03,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:04:03,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:04:03,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-14 18:04:03,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:04:03,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:03,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:04:03,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:04:03,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:04:03,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:04:03,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:04:03,727 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:04:03,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:04:03,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:04:03,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:04:03,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:04:03,730 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-14 18:04:03,730 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [217350430] [2020-10-14 18:04:03,731 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:04:03,731 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 18:04:03,731 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464997022] [2020-10-14 18:04:03,731 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 18:04:03,732 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:04:03,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 18:04:03,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-14 18:04:03,732 INFO L87 Difference]: Start difference. First operand 210 states and 276 transitions. Second operand 7 states. [2020-10-14 18:04:03,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:04:03,937 INFO L93 Difference]: Finished difference Result 268 states and 346 transitions. [2020-10-14 18:04:03,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 18:04:03,937 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2020-10-14 18:04:03,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:04:03,940 INFO L225 Difference]: With dead ends: 268 [2020-10-14 18:04:03,940 INFO L226 Difference]: Without dead ends: 225 [2020-10-14 18:04:03,941 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2020-10-14 18:04:03,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-10-14 18:04:03,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 200. [2020-10-14 18:04:03,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-10-14 18:04:03,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 263 transitions. [2020-10-14 18:04:03,974 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 263 transitions. Word has length 35 [2020-10-14 18:04:03,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:04:03,974 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 263 transitions. [2020-10-14 18:04:03,974 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 18:04:03,975 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 263 transitions. [2020-10-14 18:04:03,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-14 18:04:03,976 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:04:03,976 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:04:03,976 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 18:04:03,976 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:04:03,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:04:03,976 INFO L82 PathProgramCache]: Analyzing trace with hash 271603238, now seen corresponding path program 4 times [2020-10-14 18:04:03,977 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:04:03,978 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [141099951] [2020-10-14 18:04:03,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:04:03,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:04:03,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:04,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:04,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:04,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:04,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:05,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:04:05,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-14 18:04:05,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 18:04:05,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1219 [2020-10-14 18:04:05,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:04:05,206 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:04:05,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 18:04:05,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:04:05,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-14 18:04:05,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:04:05,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:04:05,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:04:05,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:05,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:04:05,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:04:05,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:04:05,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:04:05,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:04:05,537 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:04:05,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:04:05,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:04:05,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:04:05,538 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:04:05,544 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 18:04:05,544 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [141099951] [2020-10-14 18:04:05,544 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:04:05,544 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 18:04:05,545 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086625204] [2020-10-14 18:04:05,545 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 18:04:05,545 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:04:05,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 18:04:05,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2020-10-14 18:04:05,546 INFO L87 Difference]: Start difference. First operand 200 states and 263 transitions. Second operand 16 states. [2020-10-14 18:04:06,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:04:06,318 INFO L93 Difference]: Finished difference Result 251 states and 322 transitions. [2020-10-14 18:04:06,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 18:04:06,319 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 35 [2020-10-14 18:04:06,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:04:06,321 INFO L225 Difference]: With dead ends: 251 [2020-10-14 18:04:06,321 INFO L226 Difference]: Without dead ends: 249 [2020-10-14 18:04:06,322 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2020-10-14 18:04:06,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2020-10-14 18:04:06,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 187. [2020-10-14 18:04:06,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-10-14 18:04:06,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 243 transitions. [2020-10-14 18:04:06,342 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 243 transitions. Word has length 35 [2020-10-14 18:04:06,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:04:06,342 INFO L479 AbstractCegarLoop]: Abstraction has 187 states and 243 transitions. [2020-10-14 18:04:06,342 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 18:04:06,342 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 243 transitions. [2020-10-14 18:04:06,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-14 18:04:06,343 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:04:06,343 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:04:06,344 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 18:04:06,344 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:04:06,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:04:06,344 INFO L82 PathProgramCache]: Analyzing trace with hash -1316744664, now seen corresponding path program 5 times [2020-10-14 18:04:06,344 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:04:06,345 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [17594521] [2020-10-14 18:04:06,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:04:06,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:04:06,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:06,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:06,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:06,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:06,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:06,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:07,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:04:07,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-14 18:04:07,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 18:04:07,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1142 [2020-10-14 18:04:07,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:04:07,494 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:04:07,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 18:04:07,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:04:07,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-14 18:04:07,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:04:07,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:04:07,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:04:07,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:07,620 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:04:07,621 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:04:07,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:04:07,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:04:07,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:04:07,621 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:04:07,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:04:07,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:04:07,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:04:07,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:04:07,625 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-14 18:04:07,625 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [17594521] [2020-10-14 18:04:07,625 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:04:07,625 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 18:04:07,626 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055240274] [2020-10-14 18:04:07,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 18:04:07,626 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:04:07,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 18:04:07,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-14 18:04:07,627 INFO L87 Difference]: Start difference. First operand 187 states and 243 transitions. Second operand 12 states. [2020-10-14 18:04:08,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:04:08,033 INFO L93 Difference]: Finished difference Result 289 states and 366 transitions. [2020-10-14 18:04:08,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 18:04:08,034 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 35 [2020-10-14 18:04:08,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:04:08,036 INFO L225 Difference]: With dead ends: 289 [2020-10-14 18:04:08,036 INFO L226 Difference]: Without dead ends: 242 [2020-10-14 18:04:08,037 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=298, Unknown=0, NotChecked=0, Total=420 [2020-10-14 18:04:08,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-10-14 18:04:08,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 197. [2020-10-14 18:04:08,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-10-14 18:04:08,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 257 transitions. [2020-10-14 18:04:08,060 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 257 transitions. Word has length 35 [2020-10-14 18:04:08,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:04:08,060 INFO L479 AbstractCegarLoop]: Abstraction has 197 states and 257 transitions. [2020-10-14 18:04:08,061 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 18:04:08,061 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 257 transitions. [2020-10-14 18:04:08,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-14 18:04:08,062 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:04:08,062 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:04:08,062 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 18:04:08,062 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:04:08,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:04:08,063 INFO L82 PathProgramCache]: Analyzing trace with hash -615680086, now seen corresponding path program 6 times [2020-10-14 18:04:08,063 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:04:08,063 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1637568707] [2020-10-14 18:04:08,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:04:08,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:04:08,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:08,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:08,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:08,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:08,620 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:04:08,620 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-14 18:04:08,620 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 18:04:08,620 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 550 [2020-10-14 18:04:08,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:04:08,621 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:04:08,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 18:04:08,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 18:04:08,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-14 18:04:08,621 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:04:08,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:04:08,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:04:08,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:08,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:04:08,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:04:08,798 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:04:08,798 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:04:08,798 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:04:08,799 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:04:08,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:04:08,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:04:08,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:04:08,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:04:08,802 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-14 18:04:08,802 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1637568707] [2020-10-14 18:04:08,802 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:04:08,802 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 18:04:08,803 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822869077] [2020-10-14 18:04:08,803 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 18:04:08,803 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:04:08,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 18:04:08,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2020-10-14 18:04:08,804 INFO L87 Difference]: Start difference. First operand 197 states and 257 transitions. Second operand 14 states. [2020-10-14 18:04:09,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:04:09,671 INFO L93 Difference]: Finished difference Result 423 states and 554 transitions. [2020-10-14 18:04:09,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-14 18:04:09,672 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 35 [2020-10-14 18:04:09,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:04:09,676 INFO L225 Difference]: With dead ends: 423 [2020-10-14 18:04:09,677 INFO L226 Difference]: Without dead ends: 287 [2020-10-14 18:04:09,682 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=275, Invalid=1207, Unknown=0, NotChecked=0, Total=1482 [2020-10-14 18:04:09,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2020-10-14 18:04:09,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 239. [2020-10-14 18:04:09,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2020-10-14 18:04:09,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 312 transitions. [2020-10-14 18:04:09,723 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 312 transitions. Word has length 35 [2020-10-14 18:04:09,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:04:09,723 INFO L479 AbstractCegarLoop]: Abstraction has 239 states and 312 transitions. [2020-10-14 18:04:09,723 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 18:04:09,723 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 312 transitions. [2020-10-14 18:04:09,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-14 18:04:09,724 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:04:09,725 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:04:09,725 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-14 18:04:09,725 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:04:09,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:04:09,726 INFO L82 PathProgramCache]: Analyzing trace with hash -1383180532, now seen corresponding path program 7 times [2020-10-14 18:04:09,726 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:04:09,726 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [94360048] [2020-10-14 18:04:09,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:04:09,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:04:09,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:09,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:09,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:09,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:10,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:10,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:10,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:10,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:10,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:10,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:11,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:11,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:11,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:11,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:11,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:13,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:13,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:13,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:14,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:14,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:04:14,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-14 18:04:14,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-14 18:04:14,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 18:04:14,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:04:14,742 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:04:14,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 18:04:14,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:04:14,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-14 18:04:14,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:04:15,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:04:15,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:04:15,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:15,062 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:04:15,062 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:04:15,062 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:04:15,063 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:04:15,063 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:04:15,063 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:04:15,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:04:15,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:04:15,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:04:15,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:04:15,070 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-14 18:04:15,071 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [94360048] [2020-10-14 18:04:15,071 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:04:15,071 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 18:04:15,071 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115299511] [2020-10-14 18:04:15,071 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 18:04:15,072 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:04:15,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 18:04:15,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2020-10-14 18:04:15,072 INFO L87 Difference]: Start difference. First operand 239 states and 312 transitions. Second operand 16 states. [2020-10-14 18:04:15,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:04:15,989 INFO L93 Difference]: Finished difference Result 317 states and 409 transitions. [2020-10-14 18:04:15,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 18:04:15,990 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 38 [2020-10-14 18:04:15,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:04:15,992 INFO L225 Difference]: With dead ends: 317 [2020-10-14 18:04:15,992 INFO L226 Difference]: Without dead ends: 315 [2020-10-14 18:04:15,993 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2020-10-14 18:04:15,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2020-10-14 18:04:16,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 282. [2020-10-14 18:04:16,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 282 states. [2020-10-14 18:04:16,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 371 transitions. [2020-10-14 18:04:16,021 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 371 transitions. Word has length 38 [2020-10-14 18:04:16,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:04:16,022 INFO L479 AbstractCegarLoop]: Abstraction has 282 states and 371 transitions. [2020-10-14 18:04:16,022 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 18:04:16,022 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 371 transitions. [2020-10-14 18:04:16,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-14 18:04:16,023 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:04:16,023 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:04:16,023 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-14 18:04:16,024 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:04:16,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:04:16,024 INFO L82 PathProgramCache]: Analyzing trace with hash -1260063151, now seen corresponding path program 2 times [2020-10-14 18:04:16,024 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:04:16,024 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [483822805] [2020-10-14 18:04:16,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:04:16,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:04:16,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:16,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:16,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:16,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:16,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:17,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:17,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:19,067 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:04:19,068 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-14 18:04:19,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 18:04:19,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3035 [2020-10-14 18:04:19,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:04:19,068 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:04:19,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 18:04:19,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:04:19,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-14 18:04:19,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:04:19,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:04:19,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:04:19,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:19,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:04:19,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:04:19,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:04:19,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:04:19,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:04:19,258 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:04:19,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:04:19,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:04:19,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:04:19,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:04:19,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-14 18:04:19,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:04:19,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:19,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:04:19,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:04:19,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:04:19,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:04:19,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:04:19,264 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:04:19,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:04:19,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:04:19,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:04:19,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:04:19,270 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 19 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-14 18:04:19,270 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [483822805] [2020-10-14 18:04:19,270 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:04:19,271 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 18:04:19,271 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734959939] [2020-10-14 18:04:19,271 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 18:04:19,271 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:04:19,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 18:04:19,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2020-10-14 18:04:19,272 INFO L87 Difference]: Start difference. First operand 282 states and 371 transitions. Second operand 15 states. [2020-10-14 18:04:20,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:04:20,080 INFO L93 Difference]: Finished difference Result 447 states and 584 transitions. [2020-10-14 18:04:20,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-14 18:04:20,080 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 41 [2020-10-14 18:04:20,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:04:20,084 INFO L225 Difference]: With dead ends: 447 [2020-10-14 18:04:20,084 INFO L226 Difference]: Without dead ends: 445 [2020-10-14 18:04:20,085 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2020-10-14 18:04:20,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2020-10-14 18:04:20,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 341. [2020-10-14 18:04:20,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 341 states. [2020-10-14 18:04:20,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 451 transitions. [2020-10-14 18:04:20,124 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 451 transitions. Word has length 41 [2020-10-14 18:04:20,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:04:20,124 INFO L479 AbstractCegarLoop]: Abstraction has 341 states and 451 transitions. [2020-10-14 18:04:20,124 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 18:04:20,124 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 451 transitions. [2020-10-14 18:04:20,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-14 18:04:20,126 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:04:20,126 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] [2020-10-14 18:04:20,126 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-14 18:04:20,126 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:04:20,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:04:20,127 INFO L82 PathProgramCache]: Analyzing trace with hash 905175376, now seen corresponding path program 8 times [2020-10-14 18:04:20,127 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:04:20,127 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [208279307] [2020-10-14 18:04:20,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:04:20,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:04:20,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:20,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:20,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:20,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:20,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:21,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:22,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:22,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:23,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:23,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:23,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:24,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:24,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:25,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:04:25,135 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-14 18:04:25,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-14 18:04:25,135 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 18:04:25,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:04:25,136 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:04:25,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 18:04:25,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:04:25,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-14 18:04:25,136 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:04:25,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:04:25,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:04:25,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:25,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:04:25,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:04:25,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:04:25,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:04:25,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:04:25,577 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:04:25,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:04:25,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:04:25,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:04:25,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:04:25,588 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-14 18:04:25,588 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [208279307] [2020-10-14 18:04:25,588 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:04:25,588 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 18:04:25,589 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630073195] [2020-10-14 18:04:25,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 18:04:25,589 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:04:25,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 18:04:25,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2020-10-14 18:04:25,590 INFO L87 Difference]: Start difference. First operand 341 states and 451 transitions. Second operand 17 states. [2020-10-14 18:04:26,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:04:26,508 INFO L93 Difference]: Finished difference Result 391 states and 508 transitions. [2020-10-14 18:04:26,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 18:04:26,509 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 41 [2020-10-14 18:04:26,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:04:26,513 INFO L225 Difference]: With dead ends: 391 [2020-10-14 18:04:26,513 INFO L226 Difference]: Without dead ends: 389 [2020-10-14 18:04:26,514 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2020-10-14 18:04:26,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2020-10-14 18:04:26,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 323. [2020-10-14 18:04:26,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2020-10-14 18:04:26,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 426 transitions. [2020-10-14 18:04:26,546 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 426 transitions. Word has length 41 [2020-10-14 18:04:26,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:04:26,546 INFO L479 AbstractCegarLoop]: Abstraction has 323 states and 426 transitions. [2020-10-14 18:04:26,546 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 18:04:26,546 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 426 transitions. [2020-10-14 18:04:26,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-14 18:04:26,547 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:04:26,548 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] [2020-10-14 18:04:26,548 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-14 18:04:26,548 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:04:26,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:04:26,548 INFO L82 PathProgramCache]: Analyzing trace with hash 87526926, now seen corresponding path program 9 times [2020-10-14 18:04:26,548 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:04:26,549 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [377204747] [2020-10-14 18:04:26,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:04:26,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:04:26,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:26,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:26,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:26,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:26,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:26,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:26,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:26,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:27,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:27,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:27,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:27,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:29,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:29,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:31,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:04:31,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-14 18:04:31,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-14 18:04:31,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4753 [2020-10-14 18:04:31,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:04:31,309 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:04:31,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 18:04:31,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:04:31,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-14 18:04:31,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:04:31,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:04:31,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:04:31,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:31,679 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:04:31,679 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:04:31,680 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:04:31,680 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:04:31,680 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:04:31,680 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:04:31,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:04:31,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:04:31,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:04:31,681 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:04:31,688 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 18:04:31,688 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [377204747] [2020-10-14 18:04:31,688 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:04:31,689 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 18:04:31,689 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78005150] [2020-10-14 18:04:31,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 18:04:31,689 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:04:31,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 18:04:31,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2020-10-14 18:04:31,690 INFO L87 Difference]: Start difference. First operand 323 states and 426 transitions. Second operand 17 states. [2020-10-14 18:04:32,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:04:32,900 INFO L93 Difference]: Finished difference Result 494 states and 652 transitions. [2020-10-14 18:04:32,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 18:04:32,903 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 41 [2020-10-14 18:04:32,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:04:32,906 INFO L225 Difference]: With dead ends: 494 [2020-10-14 18:04:32,906 INFO L226 Difference]: Without dead ends: 492 [2020-10-14 18:04:32,908 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=84, Invalid=618, Unknown=0, NotChecked=0, Total=702 [2020-10-14 18:04:32,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2020-10-14 18:04:32,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 418. [2020-10-14 18:04:32,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 418 states. [2020-10-14 18:04:32,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 560 transitions. [2020-10-14 18:04:32,980 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 560 transitions. Word has length 41 [2020-10-14 18:04:32,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:04:32,980 INFO L479 AbstractCegarLoop]: Abstraction has 418 states and 560 transitions. [2020-10-14 18:04:32,980 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 18:04:32,981 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 560 transitions. [2020-10-14 18:04:32,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-14 18:04:32,990 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:04:32,990 INFO L422 BasicCegarLoop]: trace histogram [3, 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, 1] [2020-10-14 18:04:32,992 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-14 18:04:32,993 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:04:32,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:04:32,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1826466997, now seen corresponding path program 1 times [2020-10-14 18:04:32,993 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:04:32,998 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1613135250] [2020-10-14 18:04:32,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:04:33,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:04:33,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:33,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:33,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:34,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:04:34,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-14 18:04:34,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 18:04:34,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1908 [2020-10-14 18:04:34,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:04:34,919 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:04:34,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 18:04:34,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:04:34,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-14 18:04:34,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:04:34,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:04:34,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:04:34,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:34,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:04:34,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:04:34,969 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:04:34,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:04:34,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:04:34,970 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:04:34,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:04:34,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:04:34,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:04:34,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:04:34,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-14 18:04:34,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:04:34,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:34,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:04:34,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:04:34,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:04:34,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:04:34,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:04:34,975 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:04:34,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:04:34,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:04:34,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:04:34,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:04:34,979 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-14 18:04:34,979 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1613135250] [2020-10-14 18:04:34,979 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:04:34,979 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 18:04:34,980 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377938144] [2020-10-14 18:04:34,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 18:04:34,980 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:04:34,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 18:04:34,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-14 18:04:34,981 INFO L87 Difference]: Start difference. First operand 418 states and 560 transitions. Second operand 9 states. [2020-10-14 18:04:35,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:04:35,312 INFO L93 Difference]: Finished difference Result 498 states and 659 transitions. [2020-10-14 18:04:35,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 18:04:35,313 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 43 [2020-10-14 18:04:35,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:04:35,315 INFO L225 Difference]: With dead ends: 498 [2020-10-14 18:04:35,316 INFO L226 Difference]: Without dead ends: 487 [2020-10-14 18:04:35,316 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-14 18:04:35,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2020-10-14 18:04:35,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 427. [2020-10-14 18:04:35,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 427 states. [2020-10-14 18:04:35,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 570 transitions. [2020-10-14 18:04:35,368 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 570 transitions. Word has length 43 [2020-10-14 18:04:35,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:04:35,368 INFO L479 AbstractCegarLoop]: Abstraction has 427 states and 570 transitions. [2020-10-14 18:04:35,368 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 18:04:35,369 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 570 transitions. [2020-10-14 18:04:35,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-14 18:04:35,371 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:04:35,371 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:04:35,371 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-14 18:04:35,371 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:04:35,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:04:35,372 INFO L82 PathProgramCache]: Analyzing trace with hash 160155509, now seen corresponding path program 1 times [2020-10-14 18:04:35,372 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:04:35,372 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [507329762] [2020-10-14 18:04:35,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:04:35,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:04:35,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:35,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:35,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:37,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:04:37,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-14 18:04:37,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 18:04:37,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1746 [2020-10-14 18:04:37,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:04:37,127 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:04:37,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 18:04:37,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:04:37,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-14 18:04:37,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:04:37,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:04:37,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:04:37,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:37,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:04:37,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:04:37,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:04:37,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:04:37,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:04:37,178 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:04:37,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:04:37,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:04:37,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:04:37,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:04:37,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-14 18:04:37,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:04:37,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:37,186 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:04:37,186 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:04:37,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:04:37,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:04:37,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:04:37,187 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:04:37,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:04:37,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:04:37,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:04:37,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:04:37,190 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-14 18:04:37,190 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [507329762] [2020-10-14 18:04:37,191 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:04:37,191 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 18:04:37,191 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623014687] [2020-10-14 18:04:37,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 18:04:37,191 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:04:37,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 18:04:37,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-14 18:04:37,192 INFO L87 Difference]: Start difference. First operand 427 states and 570 transitions. Second operand 8 states. [2020-10-14 18:04:37,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:04:37,482 INFO L93 Difference]: Finished difference Result 478 states and 628 transitions. [2020-10-14 18:04:37,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 18:04:37,482 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 43 [2020-10-14 18:04:37,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:04:37,486 INFO L225 Difference]: With dead ends: 478 [2020-10-14 18:04:37,486 INFO L226 Difference]: Without dead ends: 460 [2020-10-14 18:04:37,487 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-10-14 18:04:37,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2020-10-14 18:04:37,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 421. [2020-10-14 18:04:37,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 421 states. [2020-10-14 18:04:37,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 561 transitions. [2020-10-14 18:04:37,544 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 561 transitions. Word has length 43 [2020-10-14 18:04:37,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:04:37,544 INFO L479 AbstractCegarLoop]: Abstraction has 421 states and 561 transitions. [2020-10-14 18:04:37,544 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 18:04:37,544 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 561 transitions. [2020-10-14 18:04:37,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-14 18:04:37,546 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:04:37,546 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:04:37,546 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-14 18:04:37,547 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:04:37,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:04:37,547 INFO L82 PathProgramCache]: Analyzing trace with hash 87768951, now seen corresponding path program 2 times [2020-10-14 18:04:37,547 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:04:37,547 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [315846566] [2020-10-14 18:04:37,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:04:37,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:04:37,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:37,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:37,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:37,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:37,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:37,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:38,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:38,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:39,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:39,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:40,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:04:40,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-14 18:04:40,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-14 18:04:40,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3379 [2020-10-14 18:04:40,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:04:40,937 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:04:40,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-14 18:04:40,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:04:40,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-14 18:04:40,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:04:41,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:04:41,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:04:41,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:41,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:04:41,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:04:41,614 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:04:41,614 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:04:41,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:04:41,615 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:04:41,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:04:41,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:04:41,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:04:41,615 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:04:41,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-14 18:04:41,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:04:41,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:41,619 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:04:41,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:04:41,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:04:41,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:04:41,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:04:41,619 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:04:41,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:04:41,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:04:41,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:04:41,620 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:04:41,627 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 18:04:41,627 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [315846566] [2020-10-14 18:04:41,627 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:04:41,627 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-14 18:04:41,627 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584097521] [2020-10-14 18:04:41,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-14 18:04:41,628 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:04:41,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-14 18:04:41,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2020-10-14 18:04:41,628 INFO L87 Difference]: Start difference. First operand 421 states and 561 transitions. Second operand 21 states. [2020-10-14 18:04:41,792 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 51 [2020-10-14 18:04:41,932 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 50 [2020-10-14 18:04:42,120 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 50 [2020-10-14 18:04:42,308 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 49 [2020-10-14 18:04:43,579 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 39 [2020-10-14 18:04:43,808 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 70 [2020-10-14 18:04:44,059 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 52 [2020-10-14 18:04:44,447 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2020-10-14 18:04:46,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:04:46,225 INFO L93 Difference]: Finished difference Result 609 states and 792 transitions. [2020-10-14 18:04:46,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-14 18:04:46,225 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 43 [2020-10-14 18:04:46,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:04:46,228 INFO L225 Difference]: With dead ends: 609 [2020-10-14 18:04:46,228 INFO L226 Difference]: Without dead ends: 607 [2020-10-14 18:04:46,230 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 808 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=497, Invalid=3043, Unknown=0, NotChecked=0, Total=3540 [2020-10-14 18:04:46,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2020-10-14 18:04:46,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 473. [2020-10-14 18:04:46,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 473 states. [2020-10-14 18:04:46,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 632 transitions. [2020-10-14 18:04:46,287 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 632 transitions. Word has length 43 [2020-10-14 18:04:46,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:04:46,288 INFO L479 AbstractCegarLoop]: Abstraction has 473 states and 632 transitions. [2020-10-14 18:04:46,288 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-14 18:04:46,288 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 632 transitions. [2020-10-14 18:04:46,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-14 18:04:46,290 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:04:46,290 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:04:46,290 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-14 18:04:46,290 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:04:46,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:04:46,291 INFO L82 PathProgramCache]: Analyzing trace with hash 306623669, now seen corresponding path program 3 times [2020-10-14 18:04:46,291 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:04:46,291 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [346540745] [2020-10-14 18:04:46,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:04:46,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:04:46,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:46,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:46,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:04:46,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-14 18:04:46,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:04:46,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 323 [2020-10-14 18:04:46,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:04:46,622 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:04:46,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 18:04:46,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-14 18:04:46,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-14 18:04:46,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:04:46,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:04:46,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:04:46,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:46,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:04:46,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:04:46,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:04:46,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:04:46,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:04:46,662 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:04:46,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:04:46,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:04:46,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:04:46,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:04:46,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-14 18:04:46,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:04:46,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:46,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:04:46,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:04:46,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:04:46,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:04:46,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:04:46,667 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:04:46,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:04:46,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 18:04:46,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:04:46,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:04:46,670 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-10-14 18:04:46,671 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [346540745] [2020-10-14 18:04:46,671 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:04:46,671 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 18:04:46,671 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676047645] [2020-10-14 18:04:46,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 18:04:46,673 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:04:46,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 18:04:46,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-14 18:04:46,673 INFO L87 Difference]: Start difference. First operand 473 states and 632 transitions. Second operand 7 states. [2020-10-14 18:04:46,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:04:46,837 INFO L93 Difference]: Finished difference Result 934 states and 1246 transitions. [2020-10-14 18:04:46,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 18:04:46,837 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 43 [2020-10-14 18:04:46,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:04:46,841 INFO L225 Difference]: With dead ends: 934 [2020-10-14 18:04:46,841 INFO L226 Difference]: Without dead ends: 624 [2020-10-14 18:04:46,842 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-14 18:04:46,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2020-10-14 18:04:46,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 443. [2020-10-14 18:04:46,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 443 states. [2020-10-14 18:04:46,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 583 transitions. [2020-10-14 18:04:46,895 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 583 transitions. Word has length 43 [2020-10-14 18:04:46,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:04:46,895 INFO L479 AbstractCegarLoop]: Abstraction has 443 states and 583 transitions. [2020-10-14 18:04:46,895 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 18:04:46,895 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 583 transitions. [2020-10-14 18:04:46,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-14 18:04:46,899 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:04:46,899 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] [2020-10-14 18:04:46,899 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-14 18:04:46,899 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:04:46,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:04:46,900 INFO L82 PathProgramCache]: Analyzing trace with hash 1297523120, now seen corresponding path program 10 times [2020-10-14 18:04:46,900 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:04:46,900 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1545496808] [2020-10-14 18:04:46,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:04:46,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:04:46,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:46,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:46,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:46,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:47,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:47,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:47,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:47,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:48,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:49,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:49,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:49,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:49,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:51,336 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:04:51,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-14 18:04:51,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-14 18:04:51,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4428 [2020-10-14 18:04:51,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:04:51,337 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:04:51,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 18:04:51,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:04:51,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-14 18:04:51,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:04:51,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:04:51,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:04:51,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:51,606 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:04:51,607 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:04:51,607 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:04:51,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:04:51,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:04:51,607 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:04:51,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:04:51,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:04:51,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:04:51,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:04:51,616 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-14 18:04:51,616 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1545496808] [2020-10-14 18:04:51,616 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:04:51,617 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 18:04:51,617 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623416533] [2020-10-14 18:04:51,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 18:04:51,617 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:04:51,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 18:04:51,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2020-10-14 18:04:51,618 INFO L87 Difference]: Start difference. First operand 443 states and 583 transitions. Second operand 17 states. [2020-10-14 18:04:52,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:04:52,530 INFO L93 Difference]: Finished difference Result 550 states and 722 transitions. [2020-10-14 18:04:52,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 18:04:52,530 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 44 [2020-10-14 18:04:52,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:04:52,534 INFO L225 Difference]: With dead ends: 550 [2020-10-14 18:04:52,534 INFO L226 Difference]: Without dead ends: 548 [2020-10-14 18:04:52,535 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2020-10-14 18:04:52,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2020-10-14 18:04:52,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 494. [2020-10-14 18:04:52,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 494 states. [2020-10-14 18:04:52,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 654 transitions. [2020-10-14 18:04:52,590 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 654 transitions. Word has length 44 [2020-10-14 18:04:52,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:04:52,590 INFO L479 AbstractCegarLoop]: Abstraction has 494 states and 654 transitions. [2020-10-14 18:04:52,590 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 18:04:52,590 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 654 transitions. [2020-10-14 18:04:52,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-14 18:04:52,592 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:04:52,592 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:04:52,593 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-14 18:04:52,594 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:04:52,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:04:52,594 INFO L82 PathProgramCache]: Analyzing trace with hash 689642731, now seen corresponding path program 3 times [2020-10-14 18:04:52,594 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:04:52,594 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2053676960] [2020-10-14 18:04:52,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:04:52,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:04:52,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:52,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:52,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:53,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:55,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:55,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:56,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:56,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:57,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:04:57,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-14 18:04:57,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 18:04:57,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-14 18:04:57,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:04:57,613 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:04:57,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 18:04:57,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:04:57,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-14 18:04:57,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:04:57,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:04:57,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:04:57,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:57,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:04:57,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:04:57,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:04:57,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:04:57,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:04:57,845 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:04:57,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:04:57,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:04:57,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:04:57,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:04:57,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-14 18:04:57,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:04:57,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:57,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:04:57,849 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:04:57,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:04:57,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:04:57,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:04:57,850 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:04:57,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:04:57,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:04:57,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 18:04:57,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:04:57,857 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 31 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-14 18:04:57,858 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2053676960] [2020-10-14 18:04:57,858 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:04:57,858 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 18:04:57,858 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248703673] [2020-10-14 18:04:57,858 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 18:04:57,858 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:04:57,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 18:04:57,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2020-10-14 18:04:57,859 INFO L87 Difference]: Start difference. First operand 494 states and 654 transitions. Second operand 16 states. [2020-10-14 18:04:58,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:04:58,486 INFO L93 Difference]: Finished difference Result 538 states and 706 transitions. [2020-10-14 18:04:58,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 18:04:58,487 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 47 [2020-10-14 18:04:58,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:04:58,490 INFO L225 Difference]: With dead ends: 538 [2020-10-14 18:04:58,491 INFO L226 Difference]: Without dead ends: 536 [2020-10-14 18:04:58,491 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2020-10-14 18:04:58,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2020-10-14 18:04:58,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 397. [2020-10-14 18:04:58,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 397 states. [2020-10-14 18:04:58,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 523 transitions. [2020-10-14 18:04:58,540 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 523 transitions. Word has length 47 [2020-10-14 18:04:58,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:04:58,540 INFO L479 AbstractCegarLoop]: Abstraction has 397 states and 523 transitions. [2020-10-14 18:04:58,540 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 18:04:58,541 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 523 transitions. [2020-10-14 18:04:58,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-14 18:04:58,542 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:04:58,542 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:04:58,542 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-14 18:04:58,542 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:04:58,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:04:58,543 INFO L82 PathProgramCache]: Analyzing trace with hash -1580849110, now seen corresponding path program 11 times [2020-10-14 18:04:58,543 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:04:58,543 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [339879588] [2020-10-14 18:04:58,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:04:58,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:04:58,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:58,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:58,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:58,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:58,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:04:59,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:00,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:00,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:00,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:01,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:02,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:02,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:02,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:02,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:02,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:03,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:03,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:03,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:03,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:03,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:03,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:05:03,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-14 18:05:03,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 20 [2020-10-14 18:05:03,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-14 18:05:03,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:05:03,562 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:05:03,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 18:05:03,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:05:03,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-14 18:05:03,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:05:03,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:05:03,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:05:03,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:03,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:05:03,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:05:03,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:05:03,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:05:03,811 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:05:03,811 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:05:03,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:05:03,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:05:03,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:05:03,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:05:03,819 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 16 proven. 37 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-14 18:05:03,819 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [339879588] [2020-10-14 18:05:03,819 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:05:03,820 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 18:05:03,820 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563473436] [2020-10-14 18:05:03,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 18:05:03,820 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:05:03,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 18:05:03,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2020-10-14 18:05:03,821 INFO L87 Difference]: Start difference. First operand 397 states and 523 transitions. Second operand 16 states. [2020-10-14 18:05:04,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:05:04,959 INFO L93 Difference]: Finished difference Result 565 states and 729 transitions. [2020-10-14 18:05:04,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-14 18:05:04,960 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 47 [2020-10-14 18:05:04,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:05:04,963 INFO L225 Difference]: With dead ends: 565 [2020-10-14 18:05:04,963 INFO L226 Difference]: Without dead ends: 499 [2020-10-14 18:05:04,964 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=298, Invalid=1184, Unknown=0, NotChecked=0, Total=1482 [2020-10-14 18:05:04,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2020-10-14 18:05:05,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 398. [2020-10-14 18:05:05,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 398 states. [2020-10-14 18:05:05,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 524 transitions. [2020-10-14 18:05:05,011 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 524 transitions. Word has length 47 [2020-10-14 18:05:05,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:05:05,011 INFO L479 AbstractCegarLoop]: Abstraction has 398 states and 524 transitions. [2020-10-14 18:05:05,011 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 18:05:05,011 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 524 transitions. [2020-10-14 18:05:05,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-14 18:05:05,013 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:05:05,013 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:05:05,013 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-14 18:05:05,013 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:05:05,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:05:05,014 INFO L82 PathProgramCache]: Analyzing trace with hash 1703000936, now seen corresponding path program 12 times [2020-10-14 18:05:05,014 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:05:05,014 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1460648931] [2020-10-14 18:05:05,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:05:05,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:05:05,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:05,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:05,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:05,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:05,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:06,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:06,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:06,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:06,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:06,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:06,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:06,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:06,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:06,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:08,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:09,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:09,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:09,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:09,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:09,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:10,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:05:10,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-14 18:05:10,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 20 [2020-10-14 18:05:10,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 18:05:10,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:05:10,022 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:05:10,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 18:05:10,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:05:10,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-14 18:05:10,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:05:10,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:05:10,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:05:10,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:10,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:05:10,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:05:10,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:05:10,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:05:10,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:05:10,578 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:05:10,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:05:10,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:05:10,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:05:10,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:05:10,586 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-14 18:05:10,586 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1460648931] [2020-10-14 18:05:10,586 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:05:10,586 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 18:05:10,586 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226195652] [2020-10-14 18:05:10,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 18:05:10,587 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:05:10,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 18:05:10,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2020-10-14 18:05:10,587 INFO L87 Difference]: Start difference. First operand 398 states and 524 transitions. Second operand 18 states. [2020-10-14 18:05:14,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:05:14,986 INFO L93 Difference]: Finished difference Result 970 states and 1251 transitions. [2020-10-14 18:05:14,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2020-10-14 18:05:14,986 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 47 [2020-10-14 18:05:14,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:05:14,990 INFO L225 Difference]: With dead ends: 970 [2020-10-14 18:05:14,990 INFO L226 Difference]: Without dead ends: 904 [2020-10-14 18:05:14,993 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3562 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1381, Invalid=8519, Unknown=0, NotChecked=0, Total=9900 [2020-10-14 18:05:14,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 904 states. [2020-10-14 18:05:15,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 904 to 587. [2020-10-14 18:05:15,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 587 states. [2020-10-14 18:05:15,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 784 transitions. [2020-10-14 18:05:15,062 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 784 transitions. Word has length 47 [2020-10-14 18:05:15,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:05:15,063 INFO L479 AbstractCegarLoop]: Abstraction has 587 states and 784 transitions. [2020-10-14 18:05:15,063 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 18:05:15,063 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 784 transitions. [2020-10-14 18:05:15,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-14 18:05:15,065 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:05:15,065 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:05:15,065 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-14 18:05:15,065 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:05:15,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:05:15,066 INFO L82 PathProgramCache]: Analyzing trace with hash -753582381, now seen corresponding path program 4 times [2020-10-14 18:05:15,066 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:05:15,066 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [83136899] [2020-10-14 18:05:15,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:05:15,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:05:15,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:15,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:15,574 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:05:15,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-14 18:05:15,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:05:15,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 500 [2020-10-14 18:05:15,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:05:15,574 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:05:15,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 18:05:15,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-14 18:05:15,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-14 18:05:15,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:05:15,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:05:15,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:05:15,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:15,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:05:15,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:05:15,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:05:15,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:05:15,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:05:15,617 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:05:15,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:05:15,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:05:15,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:05:15,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:05:15,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-14 18:05:15,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:05:15,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:15,620 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:05:15,620 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:05:15,620 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:05:15,620 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:05:15,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:05:15,620 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:05:15,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:05:15,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 18:05:15,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:05:15,621 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:05:15,622 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-10-14 18:05:15,623 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [83136899] [2020-10-14 18:05:15,623 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:05:15,623 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 18:05:15,623 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617924719] [2020-10-14 18:05:15,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 18:05:15,623 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:05:15,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 18:05:15,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-14 18:05:15,624 INFO L87 Difference]: Start difference. First operand 587 states and 784 transitions. Second operand 8 states. [2020-10-14 18:05:15,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:05:15,827 INFO L93 Difference]: Finished difference Result 1381 states and 1839 transitions. [2020-10-14 18:05:15,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 18:05:15,827 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 49 [2020-10-14 18:05:15,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:05:15,832 INFO L225 Difference]: With dead ends: 1381 [2020-10-14 18:05:15,833 INFO L226 Difference]: Without dead ends: 949 [2020-10-14 18:05:15,834 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-14 18:05:15,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 949 states. [2020-10-14 18:05:15,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 949 to 625. [2020-10-14 18:05:15,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 625 states. [2020-10-14 18:05:15,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 831 transitions. [2020-10-14 18:05:15,921 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 831 transitions. Word has length 49 [2020-10-14 18:05:15,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:05:15,922 INFO L479 AbstractCegarLoop]: Abstraction has 625 states and 831 transitions. [2020-10-14 18:05:15,922 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 18:05:15,922 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 831 transitions. [2020-10-14 18:05:15,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-14 18:05:15,924 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:05:15,924 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:05:15,924 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-14 18:05:15,924 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:05:15,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:05:15,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1723339470, now seen corresponding path program 13 times [2020-10-14 18:05:15,925 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:05:15,925 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1980079670] [2020-10-14 18:05:15,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:05:15,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:05:15,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:15,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:15,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:15,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:16,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:16,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:16,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:16,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:16,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:16,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:17,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:17,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:17,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:18,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:18,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:18,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:20,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:20,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:20,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:05:20,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-14 18:05:20,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-14 18:05:20,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-14 18:05:20,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:05:20,937 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:05:20,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-14 18:05:20,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 18:05:20,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-14 18:05:20,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:05:21,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:05:21,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:05:21,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:21,457 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:05:21,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:05:21,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:05:21,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:05:21,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:05:21,458 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:05:21,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:05:21,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:05:21,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:05:21,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:05:21,465 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 16 proven. 81 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-14 18:05:21,465 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1980079670] [2020-10-14 18:05:21,465 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:05:21,465 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-14 18:05:21,467 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531158948] [2020-10-14 18:05:21,467 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-14 18:05:21,467 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:05:21,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-14 18:05:21,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2020-10-14 18:05:21,468 INFO L87 Difference]: Start difference. First operand 625 states and 831 transitions. Second operand 21 states. [2020-10-14 18:05:23,545 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 40 [2020-10-14 18:05:24,378 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 41 [2020-10-14 18:05:26,366 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2020-10-14 18:05:27,012 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2020-10-14 18:05:27,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:05:27,450 INFO L93 Difference]: Finished difference Result 1161 states and 1498 transitions. [2020-10-14 18:05:27,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2020-10-14 18:05:27,451 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 53 [2020-10-14 18:05:27,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:05:27,458 INFO L225 Difference]: With dead ends: 1161 [2020-10-14 18:05:27,458 INFO L226 Difference]: Without dead ends: 1095 [2020-10-14 18:05:27,465 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4665 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=1662, Invalid=11448, Unknown=0, NotChecked=0, Total=13110 [2020-10-14 18:05:27,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1095 states. [2020-10-14 18:05:27,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1095 to 756. [2020-10-14 18:05:27,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 756 states. [2020-10-14 18:05:27,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 756 states to 756 states and 1011 transitions. [2020-10-14 18:05:27,598 INFO L78 Accepts]: Start accepts. Automaton has 756 states and 1011 transitions. Word has length 53 [2020-10-14 18:05:27,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:05:27,599 INFO L479 AbstractCegarLoop]: Abstraction has 756 states and 1011 transitions. [2020-10-14 18:05:27,599 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-14 18:05:27,599 INFO L276 IsEmpty]: Start isEmpty. Operand 756 states and 1011 transitions. [2020-10-14 18:05:27,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-14 18:05:27,602 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:05:27,603 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:05:27,603 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-14 18:05:27,603 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:05:27,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:05:27,603 INFO L82 PathProgramCache]: Analyzing trace with hash 539283445, now seen corresponding path program 5 times [2020-10-14 18:05:27,604 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:05:27,604 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [215739030] [2020-10-14 18:05:27,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:05:27,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:05:27,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:27,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:28,338 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:05:28,338 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-14 18:05:28,338 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:05:28,338 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 714 [2020-10-14 18:05:28,338 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:05:28,339 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:05:28,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 18:05:28,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:05:28,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-14 18:05:28,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:05:28,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:05:28,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:05:28,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:28,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:05:28,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:05:28,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:05:28,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:05:28,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:05:28,387 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:05:28,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:05:28,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:05:28,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:05:28,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:05:28,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-14 18:05:28,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:05:28,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:28,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:05:28,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:05:28,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:05:28,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:05:28,390 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:05:28,390 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:05:28,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:05:28,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 18:05:28,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:05:28,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:05:28,393 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 2 proven. 35 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-14 18:05:28,394 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [215739030] [2020-10-14 18:05:28,394 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:05:28,394 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 18:05:28,394 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541091874] [2020-10-14 18:05:28,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 18:05:28,395 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:05:28,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 18:05:28,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-14 18:05:28,395 INFO L87 Difference]: Start difference. First operand 756 states and 1011 transitions. Second operand 9 states. [2020-10-14 18:05:28,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:05:28,668 INFO L93 Difference]: Finished difference Result 1934 states and 2578 transitions. [2020-10-14 18:05:28,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 18:05:28,668 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 55 [2020-10-14 18:05:28,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:05:28,673 INFO L225 Difference]: With dead ends: 1934 [2020-10-14 18:05:28,674 INFO L226 Difference]: Without dead ends: 1362 [2020-10-14 18:05:28,675 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-14 18:05:28,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1362 states. [2020-10-14 18:05:28,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1362 to 806. [2020-10-14 18:05:28,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 806 states. [2020-10-14 18:05:28,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 1074 transitions. [2020-10-14 18:05:28,792 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 1074 transitions. Word has length 55 [2020-10-14 18:05:28,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:05:28,792 INFO L479 AbstractCegarLoop]: Abstraction has 806 states and 1074 transitions. [2020-10-14 18:05:28,792 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 18:05:28,793 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 1074 transitions. [2020-10-14 18:05:28,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-14 18:05:28,796 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:05:28,796 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 6, 6, 6, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:05:28,796 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-14 18:05:28,796 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:05:28,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:05:28,797 INFO L82 PathProgramCache]: Analyzing trace with hash -36713496, now seen corresponding path program 14 times [2020-10-14 18:05:28,797 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:05:28,797 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1144614117] [2020-10-14 18:05:28,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:05:28,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:05:28,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:28,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:28,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:28,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:28,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:29,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:29,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:29,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:29,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:29,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:29,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:30,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:30,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:30,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:30,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:30,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:30,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:31,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:33,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:05:33,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-14 18:05:33,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-14 18:05:33,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 18:05:33,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:05:33,809 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:05:33,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 18:05:33,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:05:33,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-14 18:05:33,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:05:34,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:05:34,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:05:34,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:34,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:05:34,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:05:34,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:05:34,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:05:34,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:05:34,036 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:05:34,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:05:34,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:05:34,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:05:34,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:05:34,048 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 45 proven. 51 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2020-10-14 18:05:34,048 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1144614117] [2020-10-14 18:05:34,048 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:05:34,049 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 18:05:34,049 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863053590] [2020-10-14 18:05:34,049 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 18:05:34,049 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:05:34,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 18:05:34,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2020-10-14 18:05:34,050 INFO L87 Difference]: Start difference. First operand 806 states and 1074 transitions. Second operand 15 states. [2020-10-14 18:05:34,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:05:34,726 INFO L93 Difference]: Finished difference Result 1012 states and 1328 transitions. [2020-10-14 18:05:34,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 18:05:34,726 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 59 [2020-10-14 18:05:34,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:05:34,729 INFO L225 Difference]: With dead ends: 1012 [2020-10-14 18:05:34,729 INFO L226 Difference]: Without dead ends: 829 [2020-10-14 18:05:34,730 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-10-14 18:05:34,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 829 states. [2020-10-14 18:05:34,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 829 to 753. [2020-10-14 18:05:34,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 753 states. [2020-10-14 18:05:34,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 753 states to 753 states and 999 transitions. [2020-10-14 18:05:34,833 INFO L78 Accepts]: Start accepts. Automaton has 753 states and 999 transitions. Word has length 59 [2020-10-14 18:05:34,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:05:34,834 INFO L479 AbstractCegarLoop]: Abstraction has 753 states and 999 transitions. [2020-10-14 18:05:34,834 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 18:05:34,834 INFO L276 IsEmpty]: Start isEmpty. Operand 753 states and 999 transitions. [2020-10-14 18:05:34,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-14 18:05:34,837 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:05:34,837 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:05:34,837 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-14 18:05:34,838 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:05:34,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:05:34,838 INFO L82 PathProgramCache]: Analyzing trace with hash 1914297062, now seen corresponding path program 15 times [2020-10-14 18:05:34,838 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:05:34,838 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1123546523] [2020-10-14 18:05:34,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:05:34,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:05:34,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:34,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:34,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:34,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:35,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:36,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:37,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:37,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:37,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:37,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:37,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:37,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:37,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:39,848 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:05:39,848 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-14 18:05:39,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-14 18:05:39,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-14 18:05:39,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:05:39,849 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:05:39,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-14 18:05:39,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 18:05:39,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-14 18:05:39,849 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:05:40,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:05:40,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:05:40,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:40,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:05:40,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:05:40,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:05:40,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:05:40,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:05:40,212 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:05:40,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:05:40,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:05:40,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:05:40,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:05:40,220 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 20 proven. 110 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-10-14 18:05:40,220 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1123546523] [2020-10-14 18:05:40,220 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:05:40,220 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-14 18:05:40,221 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230775485] [2020-10-14 18:05:40,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-14 18:05:40,221 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:05:40,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-14 18:05:40,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2020-10-14 18:05:40,222 INFO L87 Difference]: Start difference. First operand 753 states and 999 transitions. Second operand 20 states. [2020-10-14 18:05:42,978 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 58 [2020-10-14 18:05:44,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:05:44,351 INFO L93 Difference]: Finished difference Result 1403 states and 1797 transitions. [2020-10-14 18:05:44,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2020-10-14 18:05:44,352 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 59 [2020-10-14 18:05:44,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:05:44,358 INFO L225 Difference]: With dead ends: 1403 [2020-10-14 18:05:44,358 INFO L226 Difference]: Without dead ends: 1348 [2020-10-14 18:05:44,362 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 7 SyntacticMatches, 3 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4377 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1644, Invalid=10566, Unknown=0, NotChecked=0, Total=12210 [2020-10-14 18:05:44,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1348 states. [2020-10-14 18:05:44,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1348 to 813. [2020-10-14 18:05:44,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 813 states. [2020-10-14 18:05:44,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 813 states to 813 states and 1081 transitions. [2020-10-14 18:05:44,481 INFO L78 Accepts]: Start accepts. Automaton has 813 states and 1081 transitions. Word has length 59 [2020-10-14 18:05:44,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:05:44,481 INFO L479 AbstractCegarLoop]: Abstraction has 813 states and 1081 transitions. [2020-10-14 18:05:44,481 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-14 18:05:44,482 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states and 1081 transitions. [2020-10-14 18:05:44,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-14 18:05:44,484 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:05:44,484 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:05:44,484 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-14 18:05:44,484 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:05:44,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:05:44,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1471835567, now seen corresponding path program 6 times [2020-10-14 18:05:44,485 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:05:44,485 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1337438334] [2020-10-14 18:05:44,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:05:44,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:05:44,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:44,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:44,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:44,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:44,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:44,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:44,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:45,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:45,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:45,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:45,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:45,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:46,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:46,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:46,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:46,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:46,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:49,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:05:49,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-14 18:05:49,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-14 18:05:49,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 18:05:49,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:05:49,498 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:05:49,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-14 18:05:49,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:05:49,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-14 18:05:49,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:05:49,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:05:49,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:05:49,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:49,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:05:49,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:05:49,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:05:49,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:05:49,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:05:49,831 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:05:49,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:05:49,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:05:49,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:05:49,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:05:49,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-14 18:05:49,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:05:49,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:49,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:05:49,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:05:49,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:05:49,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:05:49,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:05:49,834 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:05:49,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:05:49,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 18:05:49,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:05:49,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:05:49,844 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 30 proven. 67 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-14 18:05:49,844 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1337438334] [2020-10-14 18:05:49,844 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:05:49,844 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-14 18:05:49,844 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293209245] [2020-10-14 18:05:49,845 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-14 18:05:49,845 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:05:49,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-14 18:05:49,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2020-10-14 18:05:49,845 INFO L87 Difference]: Start difference. First operand 813 states and 1081 transitions. Second operand 20 states. [2020-10-14 18:05:54,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:05:54,613 INFO L93 Difference]: Finished difference Result 1523 states and 1943 transitions. [2020-10-14 18:05:54,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2020-10-14 18:05:54,614 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 61 [2020-10-14 18:05:54,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:05:54,619 INFO L225 Difference]: With dead ends: 1523 [2020-10-14 18:05:54,619 INFO L226 Difference]: Without dead ends: 1468 [2020-10-14 18:05:54,622 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3615 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1505, Invalid=9001, Unknown=0, NotChecked=0, Total=10506 [2020-10-14 18:05:54,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1468 states. [2020-10-14 18:05:54,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1468 to 918. [2020-10-14 18:05:54,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 918 states. [2020-10-14 18:05:54,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 918 states to 918 states and 1224 transitions. [2020-10-14 18:05:54,769 INFO L78 Accepts]: Start accepts. Automaton has 918 states and 1224 transitions. Word has length 61 [2020-10-14 18:05:54,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:05:54,770 INFO L479 AbstractCegarLoop]: Abstraction has 918 states and 1224 transitions. [2020-10-14 18:05:54,770 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-14 18:05:54,770 INFO L276 IsEmpty]: Start isEmpty. Operand 918 states and 1224 transitions. [2020-10-14 18:05:54,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-14 18:05:54,774 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:05:54,774 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:05:54,774 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-14 18:05:54,774 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:05:54,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:05:54,775 INFO L82 PathProgramCache]: Analyzing trace with hash -1840760047, now seen corresponding path program 7 times [2020-10-14 18:05:54,775 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:05:54,775 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1280051383] [2020-10-14 18:05:54,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:05:54,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:05:54,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:54,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:54,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:54,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:55,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:55,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:55,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:55,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:55,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:55,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:56,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:56,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:57,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:57,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:59,785 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:05:59,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-14 18:05:59,786 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-14 18:05:59,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 18:05:59,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:05:59,786 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:05:59,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 18:05:59,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:05:59,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-14 18:05:59,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:05:59,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:05:59,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:05:59,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:59,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:05:59,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:05:59,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:05:59,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:05:59,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:05:59,945 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:05:59,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:05:59,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:05:59,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:05:59,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:05:59,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-14 18:05:59,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:05:59,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:05:59,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:05:59,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:05:59,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:05:59,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:05:59,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:05:59,949 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:05:59,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:05:59,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 18:05:59,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:05:59,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:05:59,955 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 25 proven. 27 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2020-10-14 18:05:59,956 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1280051383] [2020-10-14 18:05:59,956 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:05:59,956 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 18:05:59,956 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141372338] [2020-10-14 18:05:59,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 18:05:59,957 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:05:59,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 18:05:59,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-10-14 18:05:59,957 INFO L87 Difference]: Start difference. First operand 918 states and 1224 transitions. Second operand 12 states. [2020-10-14 18:06:00,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:06:00,417 INFO L93 Difference]: Finished difference Result 1111 states and 1472 transitions. [2020-10-14 18:06:00,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 18:06:00,418 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 61 [2020-10-14 18:06:00,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:06:00,422 INFO L225 Difference]: With dead ends: 1111 [2020-10-14 18:06:00,422 INFO L226 Difference]: Without dead ends: 934 [2020-10-14 18:06:00,423 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-10-14 18:06:00,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 934 states. [2020-10-14 18:06:00,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 934 to 863. [2020-10-14 18:06:00,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 863 states. [2020-10-14 18:06:00,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 1146 transitions. [2020-10-14 18:06:00,509 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 1146 transitions. Word has length 61 [2020-10-14 18:06:00,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:06:00,509 INFO L479 AbstractCegarLoop]: Abstraction has 863 states and 1146 transitions. [2020-10-14 18:06:00,509 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 18:06:00,510 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 1146 transitions. [2020-10-14 18:06:00,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-14 18:06:00,512 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:06:00,512 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:06:00,512 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-14 18:06:00,513 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:06:00,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:06:00,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1139160173, now seen corresponding path program 8 times [2020-10-14 18:06:00,513 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:06:00,513 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1787626605] [2020-10-14 18:06:00,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:06:00,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:06:00,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:00,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:01,426 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:06:01,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-14 18:06:01,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:06:01,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 905 [2020-10-14 18:06:01,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:06:01,427 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:06:01,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 18:06:01,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:06:01,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 18:06:01,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:06:01,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:06:01,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:06:01,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:01,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:06:01,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:06:01,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:06:01,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:06:01,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:06:01,491 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:06:01,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:06:01,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:06:01,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:06:01,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:06:01,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-14 18:06:01,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:06:01,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:01,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:06:01,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:06:01,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:06:01,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:06:01,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:06:01,494 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:06:01,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:06:01,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 18:06:01,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:06:01,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:06:01,497 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2020-10-14 18:06:01,498 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1787626605] [2020-10-14 18:06:01,498 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:06:01,498 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 18:06:01,498 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870687532] [2020-10-14 18:06:01,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 18:06:01,499 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:06:01,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 18:06:01,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-14 18:06:01,499 INFO L87 Difference]: Start difference. First operand 863 states and 1146 transitions. Second operand 10 states. [2020-10-14 18:06:01,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:06:01,850 INFO L93 Difference]: Finished difference Result 2376 states and 3153 transitions. [2020-10-14 18:06:01,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 18:06:01,851 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 61 [2020-10-14 18:06:01,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:06:01,859 INFO L225 Difference]: With dead ends: 2376 [2020-10-14 18:06:01,860 INFO L226 Difference]: Without dead ends: 1703 [2020-10-14 18:06:01,862 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-14 18:06:01,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1703 states. [2020-10-14 18:06:01,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1703 to 959. [2020-10-14 18:06:01,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 959 states. [2020-10-14 18:06:01,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 959 states to 959 states and 1273 transitions. [2020-10-14 18:06:01,994 INFO L78 Accepts]: Start accepts. Automaton has 959 states and 1273 transitions. Word has length 61 [2020-10-14 18:06:01,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:06:01,994 INFO L479 AbstractCegarLoop]: Abstraction has 959 states and 1273 transitions. [2020-10-14 18:06:01,994 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 18:06:01,994 INFO L276 IsEmpty]: Start isEmpty. Operand 959 states and 1273 transitions. [2020-10-14 18:06:01,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-14 18:06:01,997 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:06:01,997 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 7, 7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:06:01,997 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-14 18:06:01,997 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:06:01,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:06:01,998 INFO L82 PathProgramCache]: Analyzing trace with hash 500850190, now seen corresponding path program 16 times [2020-10-14 18:06:01,998 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:06:01,998 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [574322195] [2020-10-14 18:06:01,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:06:02,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:06:02,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:02,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:02,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:02,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:02,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:02,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:02,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:02,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:02,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:03,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:03,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:03,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:03,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:03,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:03,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:03,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:03,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:04,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:04,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:05,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:05,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:06,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:06,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:06,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:06,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:06,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:06,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:07,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:06:07,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-14 18:06:07,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 27 [2020-10-14 18:06:07,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-14 18:06:07,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:06:07,013 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:06:07,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-14 18:06:07,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:06:07,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-14 18:06:07,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:06:07,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:06:07,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:06:07,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:07,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:06:07,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:06:07,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:06:07,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:06:07,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:06:07,692 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:06:07,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:06:07,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:06:07,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:06:07,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:06:07,713 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 38 proven. 129 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-14 18:06:07,713 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [574322195] [2020-10-14 18:06:07,713 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:06:07,713 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-14 18:06:07,714 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829763363] [2020-10-14 18:06:07,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-14 18:06:07,715 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:06:07,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-14 18:06:07,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2020-10-14 18:06:07,715 INFO L87 Difference]: Start difference. First operand 959 states and 1273 transitions. Second operand 24 states. [2020-10-14 18:06:14,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:06:14,227 INFO L93 Difference]: Finished difference Result 1704 states and 2191 transitions. [2020-10-14 18:06:14,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2020-10-14 18:06:14,228 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 65 [2020-10-14 18:06:14,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:06:14,235 INFO L225 Difference]: With dead ends: 1704 [2020-10-14 18:06:14,236 INFO L226 Difference]: Without dead ends: 1654 [2020-10-14 18:06:14,237 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5742 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=1960, Invalid=13790, Unknown=0, NotChecked=0, Total=15750 [2020-10-14 18:06:14,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1654 states. [2020-10-14 18:06:14,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1654 to 1095. [2020-10-14 18:06:14,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1095 states. [2020-10-14 18:06:14,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1095 states to 1095 states and 1457 transitions. [2020-10-14 18:06:14,351 INFO L78 Accepts]: Start accepts. Automaton has 1095 states and 1457 transitions. Word has length 65 [2020-10-14 18:06:14,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:06:14,352 INFO L479 AbstractCegarLoop]: Abstraction has 1095 states and 1457 transitions. [2020-10-14 18:06:14,352 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-14 18:06:14,352 INFO L276 IsEmpty]: Start isEmpty. Operand 1095 states and 1457 transitions. [2020-10-14 18:06:14,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-14 18:06:14,354 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:06:14,354 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:06:14,354 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-14 18:06:14,354 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:06:14,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:06:14,354 INFO L82 PathProgramCache]: Analyzing trace with hash -1304588144, now seen corresponding path program 17 times [2020-10-14 18:06:14,355 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:06:14,355 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [353371451] [2020-10-14 18:06:14,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:06:14,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:06:14,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:14,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:14,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:14,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:14,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:15,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:15,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:17,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:19,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:06:19,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-14 18:06:19,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 18:06:19,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 18:06:19,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:06:19,366 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:06:19,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-14 18:06:19,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 18:06:19,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-14 18:06:19,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:06:19,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:06:19,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:06:19,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:19,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:06:19,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:06:19,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:06:19,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:06:19,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:06:19,836 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:06:19,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:06:19,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:06:19,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:06:19,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:06:19,845 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 24 proven. 150 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-10-14 18:06:19,845 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [353371451] [2020-10-14 18:06:19,845 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:06:19,845 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-14 18:06:19,845 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951838877] [2020-10-14 18:06:19,846 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-14 18:06:19,846 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:06:19,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-14 18:06:19,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=413, Unknown=0, NotChecked=0, Total=462 [2020-10-14 18:06:19,846 INFO L87 Difference]: Start difference. First operand 1095 states and 1457 transitions. Second operand 22 states. [2020-10-14 18:06:24,184 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 67 [2020-10-14 18:06:26,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:06:26,122 INFO L93 Difference]: Finished difference Result 2171 states and 2782 transitions. [2020-10-14 18:06:26,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2020-10-14 18:06:26,123 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 65 [2020-10-14 18:06:26,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:06:26,130 INFO L225 Difference]: With dead ends: 2171 [2020-10-14 18:06:26,130 INFO L226 Difference]: Without dead ends: 2130 [2020-10-14 18:06:26,133 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 8 SyntacticMatches, 4 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7806 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=2602, Invalid=17704, Unknown=0, NotChecked=0, Total=20306 [2020-10-14 18:06:26,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2130 states. [2020-10-14 18:06:26,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2130 to 1155. [2020-10-14 18:06:26,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1155 states. [2020-10-14 18:06:26,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1155 states to 1155 states and 1539 transitions. [2020-10-14 18:06:26,256 INFO L78 Accepts]: Start accepts. Automaton has 1155 states and 1539 transitions. Word has length 65 [2020-10-14 18:06:26,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:06:26,257 INFO L479 AbstractCegarLoop]: Abstraction has 1155 states and 1539 transitions. [2020-10-14 18:06:26,257 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-14 18:06:26,257 INFO L276 IsEmpty]: Start isEmpty. Operand 1155 states and 1539 transitions. [2020-10-14 18:06:26,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-14 18:06:26,260 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:06:26,260 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:06:26,260 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-14 18:06:26,260 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:06:26,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:06:26,261 INFO L82 PathProgramCache]: Analyzing trace with hash -695764171, now seen corresponding path program 9 times [2020-10-14 18:06:26,261 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:06:26,261 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1735957967] [2020-10-14 18:06:26,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:06:26,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:06:26,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:26,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:27,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:06:27,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-14 18:06:27,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:06:27,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1319 [2020-10-14 18:06:27,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:06:27,592 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:06:27,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 18:06:27,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:06:27,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-14 18:06:27,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:06:27,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:06:27,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:06:27,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:27,672 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:06:27,672 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:06:27,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:06:27,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:06:27,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:06:27,672 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:06:27,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:06:27,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:06:27,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:06:27,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:06:27,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-14 18:06:27,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:06:27,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:27,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:06:27,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:06:27,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:06:27,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:06:27,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:06:27,676 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:06:27,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:06:27,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 18:06:27,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:06:27,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:06:27,680 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 2 proven. 70 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2020-10-14 18:06:27,680 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1735957967] [2020-10-14 18:06:27,680 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:06:27,680 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 18:06:27,680 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673684555] [2020-10-14 18:06:27,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 18:06:27,681 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:06:27,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 18:06:27,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-14 18:06:27,681 INFO L87 Difference]: Start difference. First operand 1155 states and 1539 transitions. Second operand 11 states. [2020-10-14 18:06:28,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:06:28,197 INFO L93 Difference]: Finished difference Result 3467 states and 4605 transitions. [2020-10-14 18:06:28,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 18:06:28,197 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 67 [2020-10-14 18:06:28,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:06:28,207 INFO L225 Difference]: With dead ends: 3467 [2020-10-14 18:06:28,207 INFO L226 Difference]: Without dead ends: 2545 [2020-10-14 18:06:28,210 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-14 18:06:28,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2545 states. [2020-10-14 18:06:28,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2545 to 1281. [2020-10-14 18:06:28,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1281 states. [2020-10-14 18:06:28,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1281 states to 1281 states and 1706 transitions. [2020-10-14 18:06:28,374 INFO L78 Accepts]: Start accepts. Automaton has 1281 states and 1706 transitions. Word has length 67 [2020-10-14 18:06:28,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:06:28,374 INFO L479 AbstractCegarLoop]: Abstraction has 1281 states and 1706 transitions. [2020-10-14 18:06:28,374 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 18:06:28,374 INFO L276 IsEmpty]: Start isEmpty. Operand 1281 states and 1706 transitions. [2020-10-14 18:06:28,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-14 18:06:28,376 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:06:28,376 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:06:28,377 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-14 18:06:28,377 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:06:28,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:06:28,377 INFO L82 PathProgramCache]: Analyzing trace with hash -2077862040, now seen corresponding path program 18 times [2020-10-14 18:06:28,377 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:06:28,377 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [637702768] [2020-10-14 18:06:28,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:06:28,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:06:28,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:28,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:28,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:28,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:28,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:28,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:28,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:30,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:30,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:31,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:33,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:33,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:33,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:06:33,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-14 18:06:33,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-14 18:06:33,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-14 18:06:33,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:06:33,394 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:06:33,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 18:06:33,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:06:33,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-14 18:06:33,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:06:33,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:06:33,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:06:33,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:33,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:06:33,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:06:33,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:06:33,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:06:33,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:06:33,609 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:06:33,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:06:33,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:06:33,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:06:33,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:06:33,617 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 73 proven. 81 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2020-10-14 18:06:33,618 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [637702768] [2020-10-14 18:06:33,618 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:06:33,618 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 18:06:33,618 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122962027] [2020-10-14 18:06:33,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 18:06:33,618 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:06:33,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 18:06:33,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-10-14 18:06:33,619 INFO L87 Difference]: Start difference. First operand 1281 states and 1706 transitions. Second operand 15 states. [2020-10-14 18:06:34,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:06:34,504 INFO L93 Difference]: Finished difference Result 1697 states and 2247 transitions. [2020-10-14 18:06:34,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 18:06:34,505 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 71 [2020-10-14 18:06:34,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:06:34,512 INFO L225 Difference]: With dead ends: 1697 [2020-10-14 18:06:34,512 INFO L226 Difference]: Without dead ends: 1470 [2020-10-14 18:06:34,513 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2020-10-14 18:06:34,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1470 states. [2020-10-14 18:06:34,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1470 to 1344. [2020-10-14 18:06:34,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1344 states. [2020-10-14 18:06:34,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1344 states to 1344 states and 1789 transitions. [2020-10-14 18:06:34,780 INFO L78 Accepts]: Start accepts. Automaton has 1344 states and 1789 transitions. Word has length 71 [2020-10-14 18:06:34,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:06:34,781 INFO L479 AbstractCegarLoop]: Abstraction has 1344 states and 1789 transitions. [2020-10-14 18:06:34,781 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 18:06:34,781 INFO L276 IsEmpty]: Start isEmpty. Operand 1344 states and 1789 transitions. [2020-10-14 18:06:34,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-14 18:06:34,784 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:06:34,784 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:06:34,784 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-14 18:06:34,784 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:06:34,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:06:34,784 INFO L82 PathProgramCache]: Analyzing trace with hash 833110037, now seen corresponding path program 10 times [2020-10-14 18:06:34,785 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:06:34,785 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [758986612] [2020-10-14 18:06:34,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:06:34,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:06:34,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:34,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:34,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:34,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:35,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:35,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:35,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:36,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:37,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:37,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:37,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:37,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:37,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:37,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:38,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:38,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:39,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:39,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:06:39,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-14 18:06:39,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-14 18:06:39,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-14 18:06:39,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:06:39,803 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:06:39,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-14 18:06:39,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:06:39,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-14 18:06:39,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:06:40,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:06:40,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:06:40,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:40,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:06:40,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:06:40,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:06:40,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:06:40,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:06:40,089 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:06:40,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:06:40,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:06:40,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:06:40,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:06:40,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-14 18:06:40,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:06:40,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:40,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:06:40,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:06:40,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:06:40,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:06:40,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:06:40,093 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:06:40,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:06:40,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 18:06:40,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:06:40,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:06:40,112 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 47 proven. 73 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2020-10-14 18:06:40,112 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [758986612] [2020-10-14 18:06:40,113 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:06:40,113 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 18:06:40,113 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56133314] [2020-10-14 18:06:40,113 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 18:06:40,114 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:06:40,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 18:06:40,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2020-10-14 18:06:40,114 INFO L87 Difference]: Start difference. First operand 1344 states and 1789 transitions. Second operand 16 states. [2020-10-14 18:06:40,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:06:40,825 INFO L93 Difference]: Finished difference Result 1740 states and 2301 transitions. [2020-10-14 18:06:40,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 18:06:40,826 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 73 [2020-10-14 18:06:40,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:06:40,831 INFO L225 Difference]: With dead ends: 1740 [2020-10-14 18:06:40,831 INFO L226 Difference]: Without dead ends: 1565 [2020-10-14 18:06:40,832 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2020-10-14 18:06:40,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1565 states. [2020-10-14 18:06:40,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1565 to 1362. [2020-10-14 18:06:40,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1362 states. [2020-10-14 18:06:40,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1362 states to 1362 states and 1808 transitions. [2020-10-14 18:06:40,980 INFO L78 Accepts]: Start accepts. Automaton has 1362 states and 1808 transitions. Word has length 73 [2020-10-14 18:06:40,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:06:40,980 INFO L479 AbstractCegarLoop]: Abstraction has 1362 states and 1808 transitions. [2020-10-14 18:06:40,981 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 18:06:40,981 INFO L276 IsEmpty]: Start isEmpty. Operand 1362 states and 1808 transitions. [2020-10-14 18:06:40,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-14 18:06:40,983 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:06:40,983 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:06:40,983 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-14 18:06:40,983 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:06:40,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:06:40,984 INFO L82 PathProgramCache]: Analyzing trace with hash -1410873261, now seen corresponding path program 11 times [2020-10-14 18:06:40,984 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:06:40,984 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [569149913] [2020-10-14 18:06:40,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:06:40,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:06:41,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:41,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:42,760 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:06:42,760 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-14 18:06:42,760 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:06:42,760 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1764 [2020-10-14 18:06:42,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:06:42,761 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:06:42,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 18:06:42,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:06:42,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-14 18:06:42,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:06:42,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:06:42,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:06:42,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:42,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:06:42,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:06:42,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:06:42,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:06:42,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:06:42,857 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:06:42,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:06:42,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:06:42,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:06:42,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:06:42,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-10-14 18:06:42,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:06:42,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:42,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:06:42,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-14 18:06:42,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:06:42,859 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 18:06:42,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:06:42,860 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:06:42,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:06:42,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-14 18:06:42,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:06:42,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:06:42,864 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 2 proven. 92 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2020-10-14 18:06:42,864 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [569149913] [2020-10-14 18:06:42,864 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:06:42,864 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 18:06:42,864 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632306102] [2020-10-14 18:06:42,865 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 18:06:42,865 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:06:42,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 18:06:42,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-14 18:06:42,865 INFO L87 Difference]: Start difference. First operand 1362 states and 1808 transitions. Second operand 12 states. [2020-10-14 18:06:43,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:06:43,421 INFO L93 Difference]: Finished difference Result 3890 states and 5157 transitions. [2020-10-14 18:06:43,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 18:06:43,422 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 73 [2020-10-14 18:06:43,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:06:43,428 INFO L225 Difference]: With dead ends: 3890 [2020-10-14 18:06:43,428 INFO L226 Difference]: Without dead ends: 2807 [2020-10-14 18:06:43,431 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-14 18:06:43,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2807 states. [2020-10-14 18:06:43,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2807 to 1495. [2020-10-14 18:06:43,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1495 states. [2020-10-14 18:06:43,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1495 states to 1495 states and 1984 transitions. [2020-10-14 18:06:43,606 INFO L78 Accepts]: Start accepts. Automaton has 1495 states and 1984 transitions. Word has length 73 [2020-10-14 18:06:43,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:06:43,607 INFO L479 AbstractCegarLoop]: Abstraction has 1495 states and 1984 transitions. [2020-10-14 18:06:43,607 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 18:06:43,607 INFO L276 IsEmpty]: Start isEmpty. Operand 1495 states and 1984 transitions. [2020-10-14 18:06:43,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-14 18:06:43,609 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:06:43,609 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 9, 9, 9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:06:43,609 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-14 18:06:43,609 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:06:43,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:06:43,610 INFO L82 PathProgramCache]: Analyzing trace with hash 526662734, now seen corresponding path program 19 times [2020-10-14 18:06:43,610 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:06:43,610 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1821527671] [2020-10-14 18:06:43,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:06:43,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:06:43,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:43,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:43,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:43,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:44,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:44,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:44,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:45,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:45,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:45,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:45,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:45,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:46,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:46,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:46,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:47,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:47,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:47,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:47,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:48,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:48,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:48,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:06:48,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-14 18:06:48,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 21 [2020-10-14 18:06:48,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5063 [2020-10-14 18:06:48,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:06:48,686 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:06:48,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-14 18:06:48,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:06:48,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-14 18:06:48,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:06:49,371 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 42 [2020-10-14 18:06:49,605 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 42 [2020-10-14 18:06:49,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:06:49,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:06:49,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:06:49,985 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:06:49,985 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:06:49,985 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:06:49,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:06:49,985 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:06:49,986 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:06:49,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:06:49,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:06:49,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:06:49,986 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:06:50,010 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 69 proven. 186 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-10-14 18:06:50,011 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1821527671] [2020-10-14 18:06:50,011 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:06:50,011 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-14 18:06:50,011 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606144320] [2020-10-14 18:06:50,011 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-14 18:06:50,011 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:06:50,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-14 18:06:50,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2020-10-14 18:06:50,012 INFO L87 Difference]: Start difference. First operand 1495 states and 1984 transitions. Second operand 28 states. [2020-10-14 18:06:55,842 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 64 [2020-10-14 18:06:58,217 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 44 [2020-10-14 18:06:58,350 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 40 [2020-10-14 18:06:58,494 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 41 [2020-10-14 18:07:00,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:07:00,465 INFO L93 Difference]: Finished difference Result 2392 states and 3098 transitions. [2020-10-14 18:07:00,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2020-10-14 18:07:00,466 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 77 [2020-10-14 18:07:00,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:07:00,471 INFO L225 Difference]: With dead ends: 2392 [2020-10-14 18:07:00,472 INFO L226 Difference]: Without dead ends: 2342 [2020-10-14 18:07:00,476 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9016 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=2785, Invalid=20777, Unknown=0, NotChecked=0, Total=23562 [2020-10-14 18:07:00,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2342 states. [2020-10-14 18:07:00,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2342 to 1661. [2020-10-14 18:07:00,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1661 states. [2020-10-14 18:07:00,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1661 states to 1661 states and 2208 transitions. [2020-10-14 18:07:00,726 INFO L78 Accepts]: Start accepts. Automaton has 1661 states and 2208 transitions. Word has length 77 [2020-10-14 18:07:00,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:07:00,726 INFO L479 AbstractCegarLoop]: Abstraction has 1661 states and 2208 transitions. [2020-10-14 18:07:00,726 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-14 18:07:00,727 INFO L276 IsEmpty]: Start isEmpty. Operand 1661 states and 2208 transitions. [2020-10-14 18:07:00,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-14 18:07:00,730 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:07:00,730 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] [2020-10-14 18:07:00,730 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-14 18:07:00,730 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:07:00,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:07:00,731 INFO L82 PathProgramCache]: Analyzing trace with hash 588702348, now seen corresponding path program 20 times [2020-10-14 18:07:00,731 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:07:00,731 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1803763645] [2020-10-14 18:07:00,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:07:00,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:07:00,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:07:00,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:07:00,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:07:01,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:07:01,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:07:02,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:07:02,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:07:05,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:07:05,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:07:05,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:07:05,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:07:05,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:07:05,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:07:05,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-14 18:07:05,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-14 18:07:05,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 18:07:05,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:07:05,744 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:07:05,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-14 18:07:05,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-14 18:07:05,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-14 18:07:05,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:07:06,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:07:06,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:07:06,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:07:06,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:07:06,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:07:06,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:07:06,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:07:06,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:07:06,362 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:07:06,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:07:06,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:07:06,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:07:06,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:07:06,374 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 49 proven. 217 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-14 18:07:06,374 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1803763645] [2020-10-14 18:07:06,374 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:07:06,375 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-14 18:07:06,375 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760176478] [2020-10-14 18:07:06,375 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-14 18:07:06,375 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:07:06,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-14 18:07:06,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=499, Unknown=0, NotChecked=0, Total=552 [2020-10-14 18:07:06,376 INFO L87 Difference]: Start difference. First operand 1661 states and 2208 transitions. Second operand 24 states. [2020-10-14 18:07:12,988 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 76 [2020-10-14 18:07:15,724 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2020-10-14 18:07:15,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:07:15,974 INFO L93 Difference]: Finished difference Result 3061 states and 3939 transitions. [2020-10-14 18:07:15,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 167 states. [2020-10-14 18:07:15,975 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 77 [2020-10-14 18:07:15,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:07:15,981 INFO L225 Difference]: With dead ends: 3061 [2020-10-14 18:07:15,981 INFO L226 Difference]: Without dead ends: 3020 [2020-10-14 18:07:15,984 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 9 SyntacticMatches, 5 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12915 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=3930, Invalid=27932, Unknown=0, NotChecked=0, Total=31862 [2020-10-14 18:07:15,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3020 states. [2020-10-14 18:07:16,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3020 to 1735. [2020-10-14 18:07:16,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1735 states. [2020-10-14 18:07:16,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1735 states to 1735 states and 2309 transitions. [2020-10-14 18:07:16,409 INFO L78 Accepts]: Start accepts. Automaton has 1735 states and 2309 transitions. Word has length 77 [2020-10-14 18:07:16,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:07:16,409 INFO L479 AbstractCegarLoop]: Abstraction has 1735 states and 2309 transitions. [2020-10-14 18:07:16,409 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-14 18:07:16,409 INFO L276 IsEmpty]: Start isEmpty. Operand 1735 states and 2309 transitions. [2020-10-14 18:07:16,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-14 18:07:16,412 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:07:16,413 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:07:16,413 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-14 18:07:16,413 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:07:16,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:07:16,413 INFO L82 PathProgramCache]: Analyzing trace with hash 583186037, now seen corresponding path program 12 times [2020-10-14 18:07:16,414 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:07:16,414 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [717673317] [2020-10-14 18:07:16,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:07:16,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:07:16,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:07:16,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking...