/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-industry-pattern/array_single_elem_init.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 18:20:09,683 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 18:20:09,686 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 18:20:09,728 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 18:20:09,728 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 18:20:09,739 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 18:20:09,742 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 18:20:09,745 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 18:20:09,748 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 18:20:09,751 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 18:20:09,752 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 18:20:09,753 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 18:20:09,753 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 18:20:09,756 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 18:20:09,758 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 18:20:09,760 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 18:20:09,761 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 18:20:09,762 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 18:20:09,764 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 18:20:09,772 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 18:20:09,774 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 18:20:09,776 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 18:20:09,776 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 18:20:09,777 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 18:20:09,780 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 18:20:09,780 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 18:20:09,780 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 18:20:09,783 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 18:20:09,784 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 18:20:09,784 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 18:20:09,785 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 18:20:09,785 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 18:20:09,786 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 18:20:09,786 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 18:20:09,788 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 18:20:09,788 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 18:20:09,789 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 18:20:09,789 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 18:20:09,789 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 18:20:09,790 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 18:20:09,792 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 18:20:09,793 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 18:20:09,833 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 18:20:09,834 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 18:20:09,835 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 18:20:09,836 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 18:20:09,836 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 18:20:09,836 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 18:20:09,836 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 18:20:09,836 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 18:20:09,837 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 18:20:09,837 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 18:20:09,838 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 18:20:09,838 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 18:20:09,838 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 18:20:09,839 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 18:20:09,839 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 18:20:09,839 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 18:20:09,839 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 18:20:09,840 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 18:20:09,840 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 18:20:09,840 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 18:20:09,840 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 18:20:09,840 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 18:20:09,841 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 18:20:09,841 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 18:20:09,841 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 18:20:09,841 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 18:20:09,841 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 18:20:09,842 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 18:20:09,842 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 18:20:09,842 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 18:20:10,143 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 18:20:10,157 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 18:20:10,161 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 18:20:10,162 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 18:20:10,163 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 18:20:10,164 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-industry-pattern/array_single_elem_init.i [2020-10-14 18:20:10,228 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/51391ed65/57f7dad9d46043d3a586bd128300fee5/FLAGfe805e433 [2020-10-14 18:20:10,691 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 18:20:10,691 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-industry-pattern/array_single_elem_init.i [2020-10-14 18:20:10,698 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/51391ed65/57f7dad9d46043d3a586bd128300fee5/FLAGfe805e433 [2020-10-14 18:20:11,065 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/51391ed65/57f7dad9d46043d3a586bd128300fee5 [2020-10-14 18:20:11,075 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 18:20:11,077 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 18:20:11,078 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 18:20:11,078 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 18:20:11,081 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 18:20:11,082 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 06:20:11" (1/1) ... [2020-10-14 18:20:11,085 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7be095dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:20:11, skipping insertion in model container [2020-10-14 18:20:11,085 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 06:20:11" (1/1) ... [2020-10-14 18:20:11,091 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 18:20:11,107 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 18:20:11,303 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 18:20:11,307 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 18:20:11,331 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 18:20:11,351 INFO L208 MainTranslator]: Completed translation [2020-10-14 18:20:11,352 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:20:11 WrapperNode [2020-10-14 18:20:11,352 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 18:20:11,353 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 18:20:11,353 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 18:20:11,353 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 18:20:11,455 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:20:11" (1/1) ... [2020-10-14 18:20:11,455 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:20:11" (1/1) ... [2020-10-14 18:20:11,464 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:20:11" (1/1) ... [2020-10-14 18:20:11,465 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:20:11" (1/1) ... [2020-10-14 18:20:11,473 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:20:11" (1/1) ... [2020-10-14 18:20:11,482 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:20:11" (1/1) ... [2020-10-14 18:20:11,483 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:20:11" (1/1) ... [2020-10-14 18:20:11,486 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 18:20:11,486 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 18:20:11,486 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 18:20:11,486 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 18:20:11,487 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:20:11" (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 18:20:11,545 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 18:20:11,546 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 18:20:11,546 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-14 18:20:11,546 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 18:20:11,547 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 18:20:11,547 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-14 18:20:11,548 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-14 18:20:11,549 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 18:20:11,549 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-14 18:20:11,549 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-14 18:20:11,549 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-14 18:20:11,549 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-14 18:20:11,549 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 18:20:11,550 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 18:20:11,874 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 18:20:11,877 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-14 18:20:11,882 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 06:20:11 BoogieIcfgContainer [2020-10-14 18:20:11,883 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 18:20:11,884 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 18:20:11,884 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 18:20:11,887 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 18:20:11,887 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 06:20:11" (1/3) ... [2020-10-14 18:20:11,888 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@499a9fc3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 06:20:11, skipping insertion in model container [2020-10-14 18:20:11,889 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:20:11" (2/3) ... [2020-10-14 18:20:11,889 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@499a9fc3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 06:20:11, skipping insertion in model container [2020-10-14 18:20:11,889 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 06:20:11" (3/3) ... [2020-10-14 18:20:11,891 INFO L109 eAbstractionObserver]: Analyzing ICFG array_single_elem_init.i [2020-10-14 18:20:11,902 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 18:20:11,909 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 18:20:11,923 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 18:20:11,945 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 18:20:11,945 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 18:20:11,946 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 18:20:11,946 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 18:20:11,946 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 18:20:11,946 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 18:20:11,946 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 18:20:11,946 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 18:20:11,966 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-10-14 18:20:11,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-14 18:20:11,972 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:20:11,973 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:20:11,974 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:20:11,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:20:11,980 INFO L82 PathProgramCache]: Analyzing trace with hash -1656037931, now seen corresponding path program 1 times [2020-10-14 18:20:11,988 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:20:11,989 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1674792622] [2020-10-14 18:20:11,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:20:12,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:20:12,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:12,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:12,308 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:20:12,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-14 18:20:12,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:20:12,310 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 213 [2020-10-14 18:20:12,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:20:12,313 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:20:12,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 18:20:12,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 18:20:12,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-14 18:20:12,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-14 18:20:12,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:20:12,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:20:12,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:12,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:20:12,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:20:12,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:20:12,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 18:20:12,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:20:12,396 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:20:12,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:20:12,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:20:12,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:20:12,397 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:20:12,410 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 18:20:12,411 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1674792622] [2020-10-14 18:20:12,416 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 18:20:12,416 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 18:20:12,417 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970607717] [2020-10-14 18:20:12,424 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 18:20:12,425 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:20:12,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 18:20:12,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 18:20:12,440 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 4 states. [2020-10-14 18:20:12,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:20:12,591 INFO L93 Difference]: Finished difference Result 55 states and 75 transitions. [2020-10-14 18:20:12,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 18:20:12,593 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-10-14 18:20:12,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:20:12,603 INFO L225 Difference]: With dead ends: 55 [2020-10-14 18:20:12,603 INFO L226 Difference]: Without dead ends: 33 [2020-10-14 18:20:12,607 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 18:20:12,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-14 18:20:12,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 27. [2020-10-14 18:20:12,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-14 18:20:12,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2020-10-14 18:20:12,647 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 14 [2020-10-14 18:20:12,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:20:12,648 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2020-10-14 18:20:12,648 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 18:20:12,648 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2020-10-14 18:20:12,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-14 18:20:12,649 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:20:12,650 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:20:12,650 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 18:20:12,650 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:20:12,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:20:12,651 INFO L82 PathProgramCache]: Analyzing trace with hash -414258795, now seen corresponding path program 1 times [2020-10-14 18:20:12,651 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:20:12,651 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1743596227] [2020-10-14 18:20:12,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:20:12,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:20:12,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:12,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:12,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:13,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:13,785 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:20:13,786 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-14 18:20:13,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 18:20:13,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1102 [2020-10-14 18:20:13,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:20:13,787 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:20:13,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 18:20:13,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:20:13,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-14 18:20:13,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:20:13,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:20:13,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:20:13,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:13,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:20:13,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:20:13,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:20:13,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 18:20:13,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:20:13,844 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:20:13,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:20:13,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:20:13,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:20:13,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 18:20:13,857 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 18:20:13,861 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1743596227] [2020-10-14 18:20:13,861 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:20:13,862 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 18:20:13,862 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490770240] [2020-10-14 18:20:13,864 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 18:20:13,865 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:20:13,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 18:20:13,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-14 18:20:13,868 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand 5 states. [2020-10-14 18:20:14,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:20:14,009 INFO L93 Difference]: Finished difference Result 56 states and 70 transitions. [2020-10-14 18:20:14,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 18:20:14,010 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-10-14 18:20:14,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:20:14,012 INFO L225 Difference]: With dead ends: 56 [2020-10-14 18:20:14,012 INFO L226 Difference]: Without dead ends: 42 [2020-10-14 18:20:14,013 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 18:20:14,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-14 18:20:14,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 36. [2020-10-14 18:20:14,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-14 18:20:14,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 44 transitions. [2020-10-14 18:20:14,022 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 44 transitions. Word has length 22 [2020-10-14 18:20:14,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:20:14,022 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 44 transitions. [2020-10-14 18:20:14,023 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 18:20:14,023 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 44 transitions. [2020-10-14 18:20:14,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-14 18:20:14,024 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:20:14,024 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:20:14,025 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 18:20:14,025 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:20:14,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:20:14,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1579249427, now seen corresponding path program 2 times [2020-10-14 18:20:14,026 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:20:14,026 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [615064271] [2020-10-14 18:20:14,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:20:14,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:20:14,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:14,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:14,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:14,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:15,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:15,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:19,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:20:19,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-14 18:20:19,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 18:20:19,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 18:20:19,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:20:19,052 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:20:19,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 18:20:19,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:20:19,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 18:20:19,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:20:19,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:20:19,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:20:19,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:19,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:20:19,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:20:19,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:20:19,098 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:20:19,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:20:19,099 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:20:19,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:20:19,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:20:19,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:20:19,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:20:19,103 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-14 18:20:19,105 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [615064271] [2020-10-14 18:20:19,105 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:20:19,105 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 18:20:19,106 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637958751] [2020-10-14 18:20:19,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 18:20:19,108 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:20:19,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 18:20:19,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-14 18:20:19,111 INFO L87 Difference]: Start difference. First operand 36 states and 44 transitions. Second operand 6 states. [2020-10-14 18:20:19,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:20:19,267 INFO L93 Difference]: Finished difference Result 68 states and 85 transitions. [2020-10-14 18:20:19,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 18:20:19,268 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 30 [2020-10-14 18:20:19,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:20:19,269 INFO L225 Difference]: With dead ends: 68 [2020-10-14 18:20:19,270 INFO L226 Difference]: Without dead ends: 51 [2020-10-14 18:20:19,270 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-14 18:20:19,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-14 18:20:19,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 45. [2020-10-14 18:20:19,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-14 18:20:19,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 56 transitions. [2020-10-14 18:20:19,280 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 56 transitions. Word has length 30 [2020-10-14 18:20:19,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:20:19,280 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 56 transitions. [2020-10-14 18:20:19,280 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 18:20:19,280 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 56 transitions. [2020-10-14 18:20:19,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-14 18:20:19,282 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:20:19,282 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:20:19,282 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 18:20:19,283 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:20:19,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:20:19,283 INFO L82 PathProgramCache]: Analyzing trace with hash -1850469483, now seen corresponding path program 3 times [2020-10-14 18:20:19,283 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:20:19,284 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1225361489] [2020-10-14 18:20:19,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:20:19,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:20:19,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:19,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:19,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:19,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:19,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:19,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:19,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:24,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:24,340 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:20:24,340 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-14 18:20:24,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 18:20:24,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5042 [2020-10-14 18:20:24,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:20:24,342 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:20:24,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 18:20:24,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:20:24,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-14 18:20:24,344 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:20:24,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:20:24,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:20:24,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:24,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:20:24,465 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:20:24,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:20:24,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-14 18:20:24,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:20:24,466 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:20:24,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:20:24,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:20:24,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:20:24,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-14 18:20:24,483 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-14 18:20:24,483 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1225361489] [2020-10-14 18:20:24,484 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:20:24,484 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 18:20:24,485 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878754143] [2020-10-14 18:20:24,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 18:20:24,491 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:20:24,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 18:20:24,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 18:20:24,492 INFO L87 Difference]: Start difference. First operand 45 states and 56 transitions. Second operand 6 states. [2020-10-14 18:20:24,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:20:24,700 INFO L93 Difference]: Finished difference Result 91 states and 116 transitions. [2020-10-14 18:20:24,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 18:20:24,701 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 38 [2020-10-14 18:20:24,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:20:24,709 INFO L225 Difference]: With dead ends: 91 [2020-10-14 18:20:24,709 INFO L226 Difference]: Without dead ends: 57 [2020-10-14 18:20:24,711 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-14 18:20:24,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-14 18:20:24,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 51. [2020-10-14 18:20:24,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-14 18:20:24,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 62 transitions. [2020-10-14 18:20:24,735 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 62 transitions. Word has length 38 [2020-10-14 18:20:24,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:20:24,736 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 62 transitions. [2020-10-14 18:20:24,736 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 18:20:24,737 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 62 transitions. [2020-10-14 18:20:24,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-14 18:20:24,740 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:20:24,741 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:20:24,743 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 18:20:24,743 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:20:24,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:20:24,744 INFO L82 PathProgramCache]: Analyzing trace with hash -664128169, now seen corresponding path program 1 times [2020-10-14 18:20:24,744 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:20:24,745 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [361485521] [2020-10-14 18:20:24,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:20:24,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:20:24,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:24,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:25,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:20:25,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-14 18:20:25,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:20:25,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 280 [2020-10-14 18:20:25,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:20:25,052 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:20:25,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 18:20:25,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:20:25,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-14 18:20:25,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:20:25,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:20:25,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:20:25,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:25,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:20:25,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:20:25,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:20:25,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 18:20:25,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:20:25,117 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:20:25,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:20:25,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:20:25,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:20:25,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:20:25,123 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-14 18:20:25,123 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [361485521] [2020-10-14 18:20:25,123 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:20:25,124 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 18:20:25,124 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884260249] [2020-10-14 18:20:25,125 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 18:20:25,126 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:20:25,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 18:20:25,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-14 18:20:25,127 INFO L87 Difference]: Start difference. First operand 51 states and 62 transitions. Second operand 7 states. [2020-10-14 18:20:25,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:20:25,307 INFO L93 Difference]: Finished difference Result 90 states and 110 transitions. [2020-10-14 18:20:25,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 18:20:25,308 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 38 [2020-10-14 18:20:25,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:20:25,309 INFO L225 Difference]: With dead ends: 90 [2020-10-14 18:20:25,310 INFO L226 Difference]: Without dead ends: 70 [2020-10-14 18:20:25,311 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 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 18:20:25,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-14 18:20:25,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 62. [2020-10-14 18:20:25,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-14 18:20:25,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 76 transitions. [2020-10-14 18:20:25,336 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 76 transitions. Word has length 38 [2020-10-14 18:20:25,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:20:25,337 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 76 transitions. [2020-10-14 18:20:25,337 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 18:20:25,337 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 76 transitions. [2020-10-14 18:20:25,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-14 18:20:25,339 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:20:25,339 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:20:25,339 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 18:20:25,340 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:20:25,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:20:25,342 INFO L82 PathProgramCache]: Analyzing trace with hash 304191085, now seen corresponding path program 2 times [2020-10-14 18:20:25,342 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:20:25,343 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [27829211] [2020-10-14 18:20:25,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:20:25,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:20:25,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:25,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:25,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:20:25,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-14 18:20:25,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:20:25,920 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 554 [2020-10-14 18:20:25,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:20:25,921 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:20:25,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 18:20:25,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:20:25,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-14 18:20:25,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:20:26,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:20:26,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:20:26,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:26,006 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:20:26,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:20:26,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:20:26,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 18:20:26,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:20:26,008 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:20:26,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:20:26,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:20:26,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:20:26,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-14 18:20:26,020 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-14 18:20:26,022 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [27829211] [2020-10-14 18:20:26,023 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:20:26,023 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 18:20:26,024 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338863645] [2020-10-14 18:20:26,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 18:20:26,026 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:20:26,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 18:20:26,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-14 18:20:26,027 INFO L87 Difference]: Start difference. First operand 62 states and 76 transitions. Second operand 8 states. [2020-10-14 18:20:26,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:20:26,238 INFO L93 Difference]: Finished difference Result 104 states and 127 transitions. [2020-10-14 18:20:26,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 18:20:26,239 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 46 [2020-10-14 18:20:26,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:20:26,240 INFO L225 Difference]: With dead ends: 104 [2020-10-14 18:20:26,240 INFO L226 Difference]: Without dead ends: 81 [2020-10-14 18:20:26,243 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 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 18:20:26,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-14 18:20:26,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 73. [2020-10-14 18:20:26,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-14 18:20:26,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 90 transitions. [2020-10-14 18:20:26,260 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 90 transitions. Word has length 46 [2020-10-14 18:20:26,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:20:26,261 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 90 transitions. [2020-10-14 18:20:26,261 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 18:20:26,261 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 90 transitions. [2020-10-14 18:20:26,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-14 18:20:26,264 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:20:26,264 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:20:26,264 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 18:20:26,264 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:20:26,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:20:26,265 INFO L82 PathProgramCache]: Analyzing trace with hash -828408681, now seen corresponding path program 3 times [2020-10-14 18:20:26,265 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:20:26,266 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [979737538] [2020-10-14 18:20:26,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:20:26,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:20:26,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:26,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:26,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:20:26,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-14 18:20:26,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:20:26,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 609 [2020-10-14 18:20:26,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:20:26,892 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:20:26,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 18:20:26,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:20:26,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-14 18:20:26,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:20:26,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:20:26,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:20:26,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:26,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:20:26,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:20:26,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:20:26,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:20:26,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:20:26,971 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:20:26,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:20:26,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:20:26,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:20:26,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:20:26,979 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-10-14 18:20:26,979 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [979737538] [2020-10-14 18:20:26,979 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:20:26,980 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 18:20:26,981 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766503629] [2020-10-14 18:20:26,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 18:20:26,982 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:20:26,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 18:20:26,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-14 18:20:26,983 INFO L87 Difference]: Start difference. First operand 73 states and 90 transitions. Second operand 9 states. [2020-10-14 18:20:27,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:20:27,177 INFO L93 Difference]: Finished difference Result 118 states and 144 transitions. [2020-10-14 18:20:27,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 18:20:27,177 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 54 [2020-10-14 18:20:27,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:20:27,178 INFO L225 Difference]: With dead ends: 118 [2020-10-14 18:20:27,179 INFO L226 Difference]: Without dead ends: 92 [2020-10-14 18:20:27,180 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 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 18:20:27,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-14 18:20:27,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 84. [2020-10-14 18:20:27,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-14 18:20:27,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 104 transitions. [2020-10-14 18:20:27,197 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 104 transitions. Word has length 54 [2020-10-14 18:20:27,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:20:27,197 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 104 transitions. [2020-10-14 18:20:27,197 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 18:20:27,197 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 104 transitions. [2020-10-14 18:20:27,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-14 18:20:27,201 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:20:27,202 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:20:27,202 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 18:20:27,202 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:20:27,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:20:27,203 INFO L82 PathProgramCache]: Analyzing trace with hash 893310253, now seen corresponding path program 4 times [2020-10-14 18:20:27,203 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:20:27,205 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [654539663] [2020-10-14 18:20:27,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:20:27,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:20:27,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:27,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:27,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:20:27,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-14 18:20:27,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:20:27,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 593 [2020-10-14 18:20:27,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:20:27,817 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:20:27,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 18:20:27,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:20:27,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-14 18:20:27,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:20:27,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:20:27,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:20:27,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:27,906 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:20:27,906 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:20:27,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:20:27,907 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:20:27,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:20:27,907 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:20:27,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:20:27,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:20:27,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:20:27,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:20:27,915 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-10-14 18:20:27,915 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [654539663] [2020-10-14 18:20:27,915 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:20:27,916 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 18:20:27,916 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278718749] [2020-10-14 18:20:27,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 18:20:27,918 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:20:27,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 18:20:27,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-14 18:20:27,919 INFO L87 Difference]: Start difference. First operand 84 states and 104 transitions. Second operand 10 states. [2020-10-14 18:20:28,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:20:28,163 INFO L93 Difference]: Finished difference Result 132 states and 161 transitions. [2020-10-14 18:20:28,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 18:20:28,164 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 62 [2020-10-14 18:20:28,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:20:28,165 INFO L225 Difference]: With dead ends: 132 [2020-10-14 18:20:28,165 INFO L226 Difference]: Without dead ends: 103 [2020-10-14 18:20:28,168 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 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 18:20:28,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-14 18:20:28,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 95. [2020-10-14 18:20:28,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-14 18:20:28,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 118 transitions. [2020-10-14 18:20:28,190 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 118 transitions. Word has length 62 [2020-10-14 18:20:28,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:20:28,190 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 118 transitions. [2020-10-14 18:20:28,190 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 18:20:28,191 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 118 transitions. [2020-10-14 18:20:28,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-14 18:20:28,192 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:20:28,192 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:20:28,192 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 18:20:28,192 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:20:28,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:20:28,195 INFO L82 PathProgramCache]: Analyzing trace with hash -615935017, now seen corresponding path program 5 times [2020-10-14 18:20:28,195 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:20:28,195 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [310616225] [2020-10-14 18:20:28,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:20:28,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:20:28,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:28,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:28,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:20:28,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-14 18:20:28,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:20:28,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 767 [2020-10-14 18:20:28,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:20:28,978 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:20:28,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 18:20:28,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:20:28,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-14 18:20:28,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:20:29,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:20:29,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:20:29,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:29,084 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:20:29,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:20:29,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:20:29,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:20:29,085 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:20:29,085 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:20:29,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:20:29,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:20:29,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:20:29,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:20:29,092 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-10-14 18:20:29,093 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [310616225] [2020-10-14 18:20:29,093 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:20:29,093 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 18:20:29,094 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420062477] [2020-10-14 18:20:29,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 18:20:29,094 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:20:29,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 18:20:29,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-14 18:20:29,095 INFO L87 Difference]: Start difference. First operand 95 states and 118 transitions. Second operand 11 states. [2020-10-14 18:20:29,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:20:29,306 INFO L93 Difference]: Finished difference Result 146 states and 178 transitions. [2020-10-14 18:20:29,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 18:20:29,307 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 70 [2020-10-14 18:20:29,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:20:29,308 INFO L225 Difference]: With dead ends: 146 [2020-10-14 18:20:29,308 INFO L226 Difference]: Without dead ends: 114 [2020-10-14 18:20:29,309 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 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 18:20:29,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-14 18:20:29,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 106. [2020-10-14 18:20:29,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-14 18:20:29,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 132 transitions. [2020-10-14 18:20:29,317 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 132 transitions. Word has length 70 [2020-10-14 18:20:29,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:20:29,317 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 132 transitions. [2020-10-14 18:20:29,317 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 18:20:29,318 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 132 transitions. [2020-10-14 18:20:29,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-14 18:20:29,319 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:20:29,319 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:20:29,319 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 18:20:29,319 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:20:29,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:20:29,320 INFO L82 PathProgramCache]: Analyzing trace with hash 1889092589, now seen corresponding path program 6 times [2020-10-14 18:20:29,320 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:20:29,320 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [152695775] [2020-10-14 18:20:29,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:20:29,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:20:29,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:29,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:30,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:20:30,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-14 18:20:30,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:20:30,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1000 [2020-10-14 18:20:30,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:20:30,333 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:20:30,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 18:20:30,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:20:30,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-14 18:20:30,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:20:30,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:20:30,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:20:30,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:30,466 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:20:30,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:20:30,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:20:30,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:20:30,467 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:20:30,467 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:20:30,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:20:30,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:20:30,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:20:30,468 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:20:30,475 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-14 18:20:30,476 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [152695775] [2020-10-14 18:20:30,476 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:20:30,477 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 18:20:30,477 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589889742] [2020-10-14 18:20:30,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 18:20:30,477 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:20:30,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 18:20:30,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-14 18:20:30,478 INFO L87 Difference]: Start difference. First operand 106 states and 132 transitions. Second operand 12 states. [2020-10-14 18:20:30,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:20:30,732 INFO L93 Difference]: Finished difference Result 160 states and 195 transitions. [2020-10-14 18:20:30,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 18:20:30,733 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 78 [2020-10-14 18:20:30,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:20:30,734 INFO L225 Difference]: With dead ends: 160 [2020-10-14 18:20:30,734 INFO L226 Difference]: Without dead ends: 125 [2020-10-14 18:20:30,737 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-14 18:20:30,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-14 18:20:30,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 117. [2020-10-14 18:20:30,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-14 18:20:30,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 146 transitions. [2020-10-14 18:20:30,751 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 146 transitions. Word has length 78 [2020-10-14 18:20:30,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:20:30,751 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 146 transitions. [2020-10-14 18:20:30,751 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 18:20:30,752 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 146 transitions. [2020-10-14 18:20:30,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-14 18:20:30,756 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:20:30,756 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:20:30,756 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 18:20:30,757 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:20:30,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:20:30,757 INFO L82 PathProgramCache]: Analyzing trace with hash -1861453033, now seen corresponding path program 7 times [2020-10-14 18:20:30,757 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:20:30,758 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1950276703] [2020-10-14 18:20:30,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:20:30,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:20:30,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:30,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:32,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:20:32,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-14 18:20:32,855 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:20:32,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2077 [2020-10-14 18:20:32,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:20:32,856 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:20:32,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 18:20:32,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:20:32,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-14 18:20:32,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:20:32,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:20:32,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:20:32,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:32,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:20:32,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:20:32,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:20:32,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:20:32,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:20:32,993 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:20:32,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:20:32,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:20:32,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:20:32,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:20:33,004 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-10-14 18:20:33,004 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1950276703] [2020-10-14 18:20:33,005 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:20:33,005 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 18:20:33,005 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389333006] [2020-10-14 18:20:33,006 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 18:20:33,006 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:20:33,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 18:20:33,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-14 18:20:33,007 INFO L87 Difference]: Start difference. First operand 117 states and 146 transitions. Second operand 13 states. [2020-10-14 18:20:33,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:20:33,286 INFO L93 Difference]: Finished difference Result 174 states and 212 transitions. [2020-10-14 18:20:33,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 18:20:33,287 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 86 [2020-10-14 18:20:33,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:20:33,289 INFO L225 Difference]: With dead ends: 174 [2020-10-14 18:20:33,289 INFO L226 Difference]: Without dead ends: 136 [2020-10-14 18:20:33,290 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-14 18:20:33,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-14 18:20:33,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 128. [2020-10-14 18:20:33,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-14 18:20:33,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 160 transitions. [2020-10-14 18:20:33,301 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 160 transitions. Word has length 86 [2020-10-14 18:20:33,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:20:33,302 INFO L479 AbstractCegarLoop]: Abstraction has 128 states and 160 transitions. [2020-10-14 18:20:33,302 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 18:20:33,302 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 160 transitions. [2020-10-14 18:20:33,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-14 18:20:33,303 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:20:33,303 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:20:33,304 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 18:20:33,304 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:20:33,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:20:33,304 INFO L82 PathProgramCache]: Analyzing trace with hash -1223892307, now seen corresponding path program 8 times [2020-10-14 18:20:33,305 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:20:33,305 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1841121141] [2020-10-14 18:20:33,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:20:33,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:20:33,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:33,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:34,821 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:20:34,821 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-14 18:20:34,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:20:34,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1504 [2020-10-14 18:20:34,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:20:34,822 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:20:34,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 18:20:34,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:20:34,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-14 18:20:34,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:20:34,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:20:34,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:20:34,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:34,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:20:34,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:20:34,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:20:34,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 18:20:34,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:20:34,973 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:20:34,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:20:34,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:20:34,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:20:34,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:20:34,987 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-10-14 18:20:34,988 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1841121141] [2020-10-14 18:20:34,988 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:20:34,989 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 18:20:34,989 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404201438] [2020-10-14 18:20:34,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 18:20:34,990 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:20:34,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 18:20:34,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-14 18:20:34,991 INFO L87 Difference]: Start difference. First operand 128 states and 160 transitions. Second operand 14 states. [2020-10-14 18:20:35,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:20:35,291 INFO L93 Difference]: Finished difference Result 188 states and 229 transitions. [2020-10-14 18:20:35,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 18:20:35,292 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 94 [2020-10-14 18:20:35,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:20:35,293 INFO L225 Difference]: With dead ends: 188 [2020-10-14 18:20:35,293 INFO L226 Difference]: Without dead ends: 147 [2020-10-14 18:20:35,294 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-14 18:20:35,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-14 18:20:35,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 139. [2020-10-14 18:20:35,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-14 18:20:35,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 174 transitions. [2020-10-14 18:20:35,302 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 174 transitions. Word has length 94 [2020-10-14 18:20:35,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:20:35,303 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 174 transitions. [2020-10-14 18:20:35,303 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 18:20:35,303 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 174 transitions. [2020-10-14 18:20:35,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-14 18:20:35,304 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:20:35,304 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:20:35,305 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 18:20:35,305 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:20:35,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:20:35,305 INFO L82 PathProgramCache]: Analyzing trace with hash -141807017, now seen corresponding path program 9 times [2020-10-14 18:20:35,306 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:20:35,306 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1872977783] [2020-10-14 18:20:35,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:20:35,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:20:35,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:35,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:37,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:20:37,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-14 18:20:37,092 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:20:37,092 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1766 [2020-10-14 18:20:37,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:20:37,093 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:20:37,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 18:20:37,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:20:37,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-14 18:20:37,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:20:37,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:20:37,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:20:37,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:37,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:20:37,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:20:37,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:20:37,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:20:37,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:20:37,260 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:20:37,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:20:37,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:20:37,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:20:37,260 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:20:37,273 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 0 proven. 286 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-10-14 18:20:37,274 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1872977783] [2020-10-14 18:20:37,274 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:20:37,275 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 18:20:37,275 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314454854] [2020-10-14 18:20:37,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 18:20:37,276 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:20:37,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 18:20:37,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-14 18:20:37,277 INFO L87 Difference]: Start difference. First operand 139 states and 174 transitions. Second operand 15 states. [2020-10-14 18:20:37,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:20:37,558 INFO L93 Difference]: Finished difference Result 202 states and 246 transitions. [2020-10-14 18:20:37,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 18:20:37,559 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 102 [2020-10-14 18:20:37,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:20:37,560 INFO L225 Difference]: With dead ends: 202 [2020-10-14 18:20:37,561 INFO L226 Difference]: Without dead ends: 158 [2020-10-14 18:20:37,562 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-14 18:20:37,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-10-14 18:20:37,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 150. [2020-10-14 18:20:37,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-10-14 18:20:37,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 188 transitions. [2020-10-14 18:20:37,570 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 188 transitions. Word has length 102 [2020-10-14 18:20:37,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:20:37,572 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 188 transitions. [2020-10-14 18:20:37,572 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 18:20:37,572 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 188 transitions. [2020-10-14 18:20:37,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-14 18:20:37,573 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:20:37,573 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:20:37,573 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 18:20:37,574 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:20:37,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:20:37,574 INFO L82 PathProgramCache]: Analyzing trace with hash 1718989165, now seen corresponding path program 10 times [2020-10-14 18:20:37,574 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:20:37,575 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1153922971] [2020-10-14 18:20:37,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:20:37,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:20:37,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:37,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:40,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:20:40,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-14 18:20:40,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:20:40,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3374 [2020-10-14 18:20:40,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:20:40,968 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:20:40,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 18:20:40,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:20:40,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-14 18:20:40,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:20:41,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:20:41,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:20:41,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:41,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:20:41,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:20:41,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:20:41,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:20:41,146 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:20:41,146 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:20:41,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:20:41,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:20:41,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:20:41,147 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:20:41,163 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-10-14 18:20:41,164 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1153922971] [2020-10-14 18:20:41,164 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:20:41,164 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 18:20:41,165 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045354807] [2020-10-14 18:20:41,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 18:20:41,166 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:20:41,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 18:20:41,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-14 18:20:41,168 INFO L87 Difference]: Start difference. First operand 150 states and 188 transitions. Second operand 16 states. [2020-10-14 18:20:41,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:20:41,523 INFO L93 Difference]: Finished difference Result 216 states and 263 transitions. [2020-10-14 18:20:41,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 18:20:41,524 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 110 [2020-10-14 18:20:41,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:20:41,526 INFO L225 Difference]: With dead ends: 216 [2020-10-14 18:20:41,526 INFO L226 Difference]: Without dead ends: 169 [2020-10-14 18:20:41,528 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-14 18:20:41,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-10-14 18:20:41,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 161. [2020-10-14 18:20:41,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-14 18:20:41,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 202 transitions. [2020-10-14 18:20:41,542 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 202 transitions. Word has length 110 [2020-10-14 18:20:41,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:20:41,543 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 202 transitions. [2020-10-14 18:20:41,543 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 18:20:41,543 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 202 transitions. [2020-10-14 18:20:41,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-10-14 18:20:41,550 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:20:41,551 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:20:41,551 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 18:20:41,551 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:20:41,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:20:41,552 INFO L82 PathProgramCache]: Analyzing trace with hash -882067049, now seen corresponding path program 11 times [2020-10-14 18:20:41,552 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:20:41,552 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [934800610] [2020-10-14 18:20:41,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:20:41,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:20:41,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:41,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:43,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:20:43,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-10-14 18:20:43,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:20:43,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1870 [2020-10-14 18:20:43,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:20:43,448 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:20:43,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 18:20:43,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:20:43,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-14 18:20:43,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:20:43,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:20:43,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:20:43,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:43,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:20:43,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:20:43,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:20:43,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:20:43,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:20:43,616 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:20:43,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:20:43,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:20:43,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:20:43,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:20:43,629 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 0 proven. 403 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-10-14 18:20:43,630 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [934800610] [2020-10-14 18:20:43,630 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:20:43,630 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 18:20:43,630 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026725544] [2020-10-14 18:20:43,631 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 18:20:43,631 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:20:43,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 18:20:43,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-14 18:20:43,632 INFO L87 Difference]: Start difference. First operand 161 states and 202 transitions. Second operand 17 states. [2020-10-14 18:20:43,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:20:43,937 INFO L93 Difference]: Finished difference Result 230 states and 280 transitions. [2020-10-14 18:20:43,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-14 18:20:43,937 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 118 [2020-10-14 18:20:43,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:20:43,939 INFO L225 Difference]: With dead ends: 230 [2020-10-14 18:20:43,939 INFO L226 Difference]: Without dead ends: 180 [2020-10-14 18:20:43,940 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-14 18:20:43,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-14 18:20:43,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 172. [2020-10-14 18:20:43,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-10-14 18:20:43,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 216 transitions. [2020-10-14 18:20:43,949 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 216 transitions. Word has length 118 [2020-10-14 18:20:43,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:20:43,950 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 216 transitions. [2020-10-14 18:20:43,950 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 18:20:43,950 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 216 transitions. [2020-10-14 18:20:43,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-14 18:20:43,951 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:20:43,951 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:20:43,952 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 18:20:43,952 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:20:43,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:20:43,952 INFO L82 PathProgramCache]: Analyzing trace with hash 128954413, now seen corresponding path program 12 times [2020-10-14 18:20:43,952 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:20:43,953 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2144751662] [2020-10-14 18:20:43,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:20:43,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:20:43,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:44,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:46,049 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:20:46,050 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-14 18:20:46,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:20:46,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2079 [2020-10-14 18:20:46,050 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:20:46,050 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:20:46,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 18:20:46,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:20:46,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-14 18:20:46,051 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:20:46,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:20:46,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:20:46,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:46,222 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:20:46,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:20:46,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:20:46,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:20:46,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:20:46,223 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:20:46,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:20:46,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:20:46,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:20:46,223 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:20:46,241 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 469 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-10-14 18:20:46,241 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2144751662] [2020-10-14 18:20:46,244 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:20:46,244 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 18:20:46,244 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570371861] [2020-10-14 18:20:46,245 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 18:20:46,245 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:20:46,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 18:20:46,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-14 18:20:46,246 INFO L87 Difference]: Start difference. First operand 172 states and 216 transitions. Second operand 18 states. [2020-10-14 18:20:46,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:20:46,624 INFO L93 Difference]: Finished difference Result 244 states and 297 transitions. [2020-10-14 18:20:46,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 18:20:46,625 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 126 [2020-10-14 18:20:46,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:20:46,626 INFO L225 Difference]: With dead ends: 244 [2020-10-14 18:20:46,627 INFO L226 Difference]: Without dead ends: 191 [2020-10-14 18:20:46,627 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-14 18:20:46,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-10-14 18:20:46,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 183. [2020-10-14 18:20:46,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-10-14 18:20:46,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 230 transitions. [2020-10-14 18:20:46,637 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 230 transitions. Word has length 126 [2020-10-14 18:20:46,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:20:46,638 INFO L479 AbstractCegarLoop]: Abstraction has 183 states and 230 transitions. [2020-10-14 18:20:46,638 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 18:20:46,638 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 230 transitions. [2020-10-14 18:20:46,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-10-14 18:20:46,639 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:20:46,640 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:20:46,640 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 18:20:46,640 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:20:46,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:20:46,640 INFO L82 PathProgramCache]: Analyzing trace with hash -1101917993, now seen corresponding path program 13 times [2020-10-14 18:20:46,641 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:20:46,641 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [167157901] [2020-10-14 18:20:46,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:20:46,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:20:46,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:46,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:49,015 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:20:49,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 142 [2020-10-14 18:20:49,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:20:49,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2358 [2020-10-14 18:20:49,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:20:49,016 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:20:49,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 18:20:49,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:20:49,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-14 18:20:49,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:20:49,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:20:49,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:20:49,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:49,216 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:20:49,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:20:49,217 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:20:49,217 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:20:49,217 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:20:49,217 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:20:49,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:20:49,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:20:49,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:20:49,218 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:20:49,234 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 0 proven. 540 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-10-14 18:20:49,234 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [167157901] [2020-10-14 18:20:49,234 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:20:49,234 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-14 18:20:49,235 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841774521] [2020-10-14 18:20:49,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-14 18:20:49,235 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:20:49,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-14 18:20:49,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-14 18:20:49,236 INFO L87 Difference]: Start difference. First operand 183 states and 230 transitions. Second operand 19 states. [2020-10-14 18:20:49,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:20:49,626 INFO L93 Difference]: Finished difference Result 258 states and 314 transitions. [2020-10-14 18:20:49,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 18:20:49,627 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 134 [2020-10-14 18:20:49,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:20:49,628 INFO L225 Difference]: With dead ends: 258 [2020-10-14 18:20:49,628 INFO L226 Difference]: Without dead ends: 202 [2020-10-14 18:20:49,630 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-14 18:20:49,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-10-14 18:20:49,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 194. [2020-10-14 18:20:49,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-10-14 18:20:49,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 244 transitions. [2020-10-14 18:20:49,637 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 244 transitions. Word has length 134 [2020-10-14 18:20:49,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:20:49,637 INFO L479 AbstractCegarLoop]: Abstraction has 194 states and 244 transitions. [2020-10-14 18:20:49,637 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-14 18:20:49,637 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 244 transitions. [2020-10-14 18:20:49,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-10-14 18:20:49,639 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:20:49,639 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:20:49,640 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 18:20:49,640 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:20:49,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:20:49,640 INFO L82 PathProgramCache]: Analyzing trace with hash 244768493, now seen corresponding path program 14 times [2020-10-14 18:20:49,641 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:20:49,641 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [736410933] [2020-10-14 18:20:49,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:20:49,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:20:49,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:49,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:52,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:20:52,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 150 [2020-10-14 18:20:52,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:20:52,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2769 [2020-10-14 18:20:52,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:20:52,429 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:20:52,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 18:20:52,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:20:52,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-14 18:20:52,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:20:52,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:20:52,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:20:52,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:52,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:20:52,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:20:52,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:20:52,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:20:52,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:20:52,661 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:20:52,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:20:52,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:20:52,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:20:52,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:20:52,674 INFO L134 CoverageAnalysis]: Checked inductivity of 1008 backedges. 0 proven. 616 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-10-14 18:20:52,675 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [736410933] [2020-10-14 18:20:52,675 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:20:52,675 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-14 18:20:52,675 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815745433] [2020-10-14 18:20:52,676 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-14 18:20:52,676 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:20:52,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-14 18:20:52,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-14 18:20:52,677 INFO L87 Difference]: Start difference. First operand 194 states and 244 transitions. Second operand 20 states. [2020-10-14 18:20:53,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:20:53,097 INFO L93 Difference]: Finished difference Result 272 states and 331 transitions. [2020-10-14 18:20:53,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-14 18:20:53,098 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 142 [2020-10-14 18:20:53,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:20:53,100 INFO L225 Difference]: With dead ends: 272 [2020-10-14 18:20:53,100 INFO L226 Difference]: Without dead ends: 213 [2020-10-14 18:20:53,102 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-14 18:20:53,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-10-14 18:20:53,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 205. [2020-10-14 18:20:53,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2020-10-14 18:20:53,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 258 transitions. [2020-10-14 18:20:53,111 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 258 transitions. Word has length 142 [2020-10-14 18:20:53,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:20:53,112 INFO L479 AbstractCegarLoop]: Abstraction has 205 states and 258 transitions. [2020-10-14 18:20:53,112 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-14 18:20:53,112 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 258 transitions. [2020-10-14 18:20:53,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-10-14 18:20:53,124 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:20:53,124 INFO L422 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:20:53,125 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-14 18:20:53,125 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:20:53,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:20:53,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1226819561, now seen corresponding path program 15 times [2020-10-14 18:20:53,125 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:20:53,126 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [918835952] [2020-10-14 18:20:53,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:20:53,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:20:53,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:53,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:56,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:20:56,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 158 [2020-10-14 18:20:56,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:20:56,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3451 [2020-10-14 18:20:56,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:20:56,595 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:20:56,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-14 18:20:56,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:20:56,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-14 18:20:56,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:20:56,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:20:56,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:20:56,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:56,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:20:56,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:20:56,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:20:56,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:20:56,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:20:56,828 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:20:56,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:20:56,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:20:56,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:20:56,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:20:56,841 INFO L134 CoverageAnalysis]: Checked inductivity of 1139 backedges. 0 proven. 697 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2020-10-14 18:20:56,842 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [918835952] [2020-10-14 18:20:56,842 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:20:56,842 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-14 18:20:56,842 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167664978] [2020-10-14 18:20:56,843 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-14 18:20:56,843 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:20:56,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-14 18:20:56,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-14 18:20:56,844 INFO L87 Difference]: Start difference. First operand 205 states and 258 transitions. Second operand 21 states. [2020-10-14 18:20:57,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:20:57,296 INFO L93 Difference]: Finished difference Result 286 states and 348 transitions. [2020-10-14 18:20:57,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-14 18:20:57,296 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 150 [2020-10-14 18:20:57,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:20:57,298 INFO L225 Difference]: With dead ends: 286 [2020-10-14 18:20:57,298 INFO L226 Difference]: Without dead ends: 224 [2020-10-14 18:20:57,299 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-14 18:20:57,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-10-14 18:20:57,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 216. [2020-10-14 18:20:57,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-10-14 18:20:57,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 272 transitions. [2020-10-14 18:20:57,307 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 272 transitions. Word has length 150 [2020-10-14 18:20:57,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:20:57,307 INFO L479 AbstractCegarLoop]: Abstraction has 216 states and 272 transitions. [2020-10-14 18:20:57,308 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-14 18:20:57,308 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 272 transitions. [2020-10-14 18:20:57,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-10-14 18:20:57,309 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:20:57,310 INFO L422 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:20:57,310 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-14 18:20:57,310 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:20:57,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:20:57,310 INFO L82 PathProgramCache]: Analyzing trace with hash -1710801491, now seen corresponding path program 16 times [2020-10-14 18:20:57,311 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:20:57,311 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1910209922] [2020-10-14 18:20:57,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:20:57,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:20:57,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:20:57,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:01,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:01,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 166 [2020-10-14 18:21:01,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:21:01,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3834 [2020-10-14 18:21:01,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:01,164 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:01,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 18:21:01,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:21:01,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-14 18:21:01,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:21:01,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:21:01,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:01,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:01,434 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:01,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:21:01,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:21:01,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:21:01,434 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:01,435 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:01,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:21:01,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:21:01,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:21:01,435 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:21:01,452 INFO L134 CoverageAnalysis]: Checked inductivity of 1278 backedges. 0 proven. 783 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2020-10-14 18:21:01,452 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1910209922] [2020-10-14 18:21:01,452 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:21:01,453 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-14 18:21:01,453 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236817721] [2020-10-14 18:21:01,453 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-14 18:21:01,454 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:21:01,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-14 18:21:01,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-14 18:21:01,455 INFO L87 Difference]: Start difference. First operand 216 states and 272 transitions. Second operand 22 states. [2020-10-14 18:21:01,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:21:01,922 INFO L93 Difference]: Finished difference Result 300 states and 365 transitions. [2020-10-14 18:21:01,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 18:21:01,922 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 158 [2020-10-14 18:21:01,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:21:01,924 INFO L225 Difference]: With dead ends: 300 [2020-10-14 18:21:01,924 INFO L226 Difference]: Without dead ends: 235 [2020-10-14 18:21:01,925 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-14 18:21:01,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-10-14 18:21:01,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 227. [2020-10-14 18:21:01,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2020-10-14 18:21:01,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 286 transitions. [2020-10-14 18:21:01,946 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 286 transitions. Word has length 158 [2020-10-14 18:21:01,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:21:01,946 INFO L479 AbstractCegarLoop]: Abstraction has 227 states and 286 transitions. [2020-10-14 18:21:01,947 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-14 18:21:01,947 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 286 transitions. [2020-10-14 18:21:01,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-10-14 18:21:01,949 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:21:01,949 INFO L422 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:21:01,949 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-14 18:21:01,949 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:21:01,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:21:01,950 INFO L82 PathProgramCache]: Analyzing trace with hash 280702807, now seen corresponding path program 17 times [2020-10-14 18:21:01,950 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:21:01,950 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [15604771] [2020-10-14 18:21:01,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:21:01,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:01,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:02,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:06,413 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:06,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 174 [2020-10-14 18:21:06,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:21:06,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4444 [2020-10-14 18:21:06,414 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:06,414 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:06,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-14 18:21:06,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:21:06,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 97 [2020-10-14 18:21:06,414 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:21:06,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:21:06,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:06,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:06,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:06,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:21:06,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:21:06,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:21:06,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:06,704 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:06,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:21:06,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:21:06,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:21:06,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:21:06,719 INFO L134 CoverageAnalysis]: Checked inductivity of 1425 backedges. 0 proven. 874 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2020-10-14 18:21:06,719 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [15604771] [2020-10-14 18:21:06,719 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:21:06,719 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-14 18:21:06,720 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268255327] [2020-10-14 18:21:06,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-14 18:21:06,720 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:21:06,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-14 18:21:06,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-14 18:21:06,721 INFO L87 Difference]: Start difference. First operand 227 states and 286 transitions. Second operand 23 states. [2020-10-14 18:21:07,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:21:07,147 INFO L93 Difference]: Finished difference Result 314 states and 382 transitions. [2020-10-14 18:21:07,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-14 18:21:07,148 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 166 [2020-10-14 18:21:07,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:21:07,150 INFO L225 Difference]: With dead ends: 314 [2020-10-14 18:21:07,150 INFO L226 Difference]: Without dead ends: 246 [2020-10-14 18:21:07,151 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-14 18:21:07,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-10-14 18:21:07,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 238. [2020-10-14 18:21:07,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2020-10-14 18:21:07,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 300 transitions. [2020-10-14 18:21:07,161 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 300 transitions. Word has length 166 [2020-10-14 18:21:07,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:21:07,161 INFO L479 AbstractCegarLoop]: Abstraction has 238 states and 300 transitions. [2020-10-14 18:21:07,161 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-14 18:21:07,161 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 300 transitions. [2020-10-14 18:21:07,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2020-10-14 18:21:07,163 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:21:07,163 INFO L422 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:21:07,163 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-14 18:21:07,163 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:21:07,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:21:07,164 INFO L82 PathProgramCache]: Analyzing trace with hash 870108269, now seen corresponding path program 18 times [2020-10-14 18:21:07,164 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:21:07,164 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [142671592] [2020-10-14 18:21:07,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:21:07,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:07,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:07,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:12,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:12,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 182 [2020-10-14 18:21:12,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:21:12,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 18:21:12,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:12,187 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:12,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-14 18:21:12,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:21:12,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-14 18:21:12,188 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:21:12,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:21:12,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:12,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:12,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:12,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:21:12,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:21:12,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:21:12,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:12,492 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:12,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:21:12,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:21:12,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:21:12,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:21:12,509 INFO L134 CoverageAnalysis]: Checked inductivity of 1580 backedges. 0 proven. 970 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2020-10-14 18:21:12,509 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [142671592] [2020-10-14 18:21:12,509 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:21:12,509 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-14 18:21:12,510 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078892787] [2020-10-14 18:21:12,510 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-14 18:21:12,510 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:21:12,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-14 18:21:12,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-14 18:21:12,511 INFO L87 Difference]: Start difference. First operand 238 states and 300 transitions. Second operand 24 states. [2020-10-14 18:21:12,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:21:12,961 INFO L93 Difference]: Finished difference Result 328 states and 399 transitions. [2020-10-14 18:21:12,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-14 18:21:12,963 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 174 [2020-10-14 18:21:12,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:21:12,965 INFO L225 Difference]: With dead ends: 328 [2020-10-14 18:21:12,965 INFO L226 Difference]: Without dead ends: 257 [2020-10-14 18:21:12,966 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-14 18:21:12,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2020-10-14 18:21:12,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 249. [2020-10-14 18:21:12,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2020-10-14 18:21:12,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 314 transitions. [2020-10-14 18:21:12,977 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 314 transitions. Word has length 174 [2020-10-14 18:21:12,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:21:12,977 INFO L479 AbstractCegarLoop]: Abstraction has 249 states and 314 transitions. [2020-10-14 18:21:12,977 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-14 18:21:12,977 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 314 transitions. [2020-10-14 18:21:12,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2020-10-14 18:21:12,979 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:21:12,979 INFO L422 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:21:12,979 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-14 18:21:12,980 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:21:12,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:21:12,980 INFO L82 PathProgramCache]: Analyzing trace with hash -595134825, now seen corresponding path program 19 times [2020-10-14 18:21:12,980 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:21:12,981 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [582875039] [2020-10-14 18:21:12,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:21:13,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:13,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:13,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:18,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:18,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 190 [2020-10-14 18:21:18,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:21:18,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-14 18:21:18,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:18,006 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:18,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-14 18:21:18,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:21:18,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 107 [2020-10-14 18:21:18,006 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:21:18,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:21:18,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:18,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:18,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:18,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:21:18,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:21:18,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:21:18,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:18,346 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:18,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:21:18,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:21:18,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:21:18,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:21:18,365 INFO L134 CoverageAnalysis]: Checked inductivity of 1743 backedges. 0 proven. 1071 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2020-10-14 18:21:18,366 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [582875039] [2020-10-14 18:21:18,366 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:21:18,366 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-14 18:21:18,366 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118502018] [2020-10-14 18:21:18,367 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-14 18:21:18,367 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:21:18,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-14 18:21:18,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-14 18:21:18,368 INFO L87 Difference]: Start difference. First operand 249 states and 314 transitions. Second operand 25 states. [2020-10-14 18:21:18,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:21:18,909 INFO L93 Difference]: Finished difference Result 342 states and 416 transitions. [2020-10-14 18:21:18,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-14 18:21:18,909 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 182 [2020-10-14 18:21:18,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:21:18,911 INFO L225 Difference]: With dead ends: 342 [2020-10-14 18:21:18,911 INFO L226 Difference]: Without dead ends: 268 [2020-10-14 18:21:18,913 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-14 18:21:18,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2020-10-14 18:21:18,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 260. [2020-10-14 18:21:18,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-10-14 18:21:18,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 328 transitions. [2020-10-14 18:21:18,922 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 328 transitions. Word has length 182 [2020-10-14 18:21:18,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:21:18,923 INFO L479 AbstractCegarLoop]: Abstraction has 260 states and 328 transitions. [2020-10-14 18:21:18,923 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-14 18:21:18,923 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 328 transitions. [2020-10-14 18:21:18,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2020-10-14 18:21:18,924 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:21:18,924 INFO L422 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:21:18,925 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-14 18:21:18,925 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:21:18,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:21:18,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1863087315, now seen corresponding path program 20 times [2020-10-14 18:21:18,925 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:21:18,926 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [150273818] [2020-10-14 18:21:18,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:21:18,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:18,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:19,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:23,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:23,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 198 [2020-10-14 18:21:23,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:21:23,950 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 18:21:23,950 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:23,950 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:23,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-14 18:21:23,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:21:23,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-14 18:21:23,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:21:24,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:21:24,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:24,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:24,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:24,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:21:24,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:21:24,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:21:24,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:24,327 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:24,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:21:24,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:21:24,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:21:24,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:21:24,348 INFO L134 CoverageAnalysis]: Checked inductivity of 1914 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2020-10-14 18:21:24,349 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [150273818] [2020-10-14 18:21:24,349 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:21:24,349 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-14 18:21:24,349 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172327943] [2020-10-14 18:21:24,350 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-14 18:21:24,350 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:21:24,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-14 18:21:24,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-14 18:21:24,351 INFO L87 Difference]: Start difference. First operand 260 states and 328 transitions. Second operand 26 states. [2020-10-14 18:21:24,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:21:24,896 INFO L93 Difference]: Finished difference Result 356 states and 433 transitions. [2020-10-14 18:21:24,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-14 18:21:24,902 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 190 [2020-10-14 18:21:24,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:21:24,904 INFO L225 Difference]: With dead ends: 356 [2020-10-14 18:21:24,904 INFO L226 Difference]: Without dead ends: 279 [2020-10-14 18:21:24,905 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-14 18:21:24,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2020-10-14 18:21:24,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 271. [2020-10-14 18:21:24,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-10-14 18:21:24,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 342 transitions. [2020-10-14 18:21:24,915 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 342 transitions. Word has length 190 [2020-10-14 18:21:24,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:21:24,915 INFO L479 AbstractCegarLoop]: Abstraction has 271 states and 342 transitions. [2020-10-14 18:21:24,916 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-14 18:21:24,916 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 342 transitions. [2020-10-14 18:21:24,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2020-10-14 18:21:24,917 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:21:24,917 INFO L422 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:21:24,918 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-14 18:21:24,918 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:21:24,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:21:24,918 INFO L82 PathProgramCache]: Analyzing trace with hash 535268823, now seen corresponding path program 21 times [2020-10-14 18:21:24,918 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:21:24,919 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [495757516] [2020-10-14 18:21:24,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:21:24,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:24,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:25,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:29,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:29,950 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 206 [2020-10-14 18:21:29,950 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:21:29,950 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-14 18:21:29,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:29,951 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:29,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-14 18:21:29,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:21:29,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 117 [2020-10-14 18:21:29,951 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:21:30,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:21:30,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:30,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:30,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:30,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:21:30,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:21:30,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:21:30,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:30,368 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:30,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:21:30,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:21:30,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:21:30,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:21:30,395 INFO L134 CoverageAnalysis]: Checked inductivity of 2093 backedges. 0 proven. 1288 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2020-10-14 18:21:30,395 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [495757516] [2020-10-14 18:21:30,395 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:21:30,396 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-14 18:21:30,396 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462940160] [2020-10-14 18:21:30,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-14 18:21:30,396 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:21:30,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-14 18:21:30,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-14 18:21:30,397 INFO L87 Difference]: Start difference. First operand 271 states and 342 transitions. Second operand 27 states. [2020-10-14 18:21:31,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:21:31,013 INFO L93 Difference]: Finished difference Result 370 states and 450 transitions. [2020-10-14 18:21:31,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-14 18:21:31,013 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 198 [2020-10-14 18:21:31,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:21:31,017 INFO L225 Difference]: With dead ends: 370 [2020-10-14 18:21:31,017 INFO L226 Difference]: Without dead ends: 290 [2020-10-14 18:21:31,018 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-14 18:21:31,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2020-10-14 18:21:31,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 282. [2020-10-14 18:21:31,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 282 states. [2020-10-14 18:21:31,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 356 transitions. [2020-10-14 18:21:31,032 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 356 transitions. Word has length 198 [2020-10-14 18:21:31,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:21:31,032 INFO L479 AbstractCegarLoop]: Abstraction has 282 states and 356 transitions. [2020-10-14 18:21:31,032 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-14 18:21:31,033 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 356 transitions. [2020-10-14 18:21:31,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2020-10-14 18:21:31,034 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:21:31,034 INFO L422 BasicCegarLoop]: trace histogram [25, 24, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:21:31,035 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-14 18:21:31,035 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:21:31,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:21:31,035 INFO L82 PathProgramCache]: Analyzing trace with hash 1361541613, now seen corresponding path program 22 times [2020-10-14 18:21:31,035 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:21:31,036 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1986087986] [2020-10-14 18:21:31,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:21:31,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:31,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:31,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:36,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:36,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 214 [2020-10-14 18:21:36,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:21:36,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-14 18:21:36,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:36,069 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:36,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-14 18:21:36,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:21:36,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 122 [2020-10-14 18:21:36,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:21:36,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:21:36,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:36,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:36,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:36,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:21:36,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:21:36,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:21:36,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:36,549 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:36,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:21:36,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:21:36,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:21:36,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:21:36,574 INFO L134 CoverageAnalysis]: Checked inductivity of 2280 backedges. 0 proven. 1404 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2020-10-14 18:21:36,574 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1986087986] [2020-10-14 18:21:36,574 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:21:36,574 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-14 18:21:36,574 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019066181] [2020-10-14 18:21:36,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-14 18:21:36,575 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:21:36,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-14 18:21:36,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-14 18:21:36,576 INFO L87 Difference]: Start difference. First operand 282 states and 356 transitions. Second operand 28 states. [2020-10-14 18:21:37,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:21:37,206 INFO L93 Difference]: Finished difference Result 384 states and 467 transitions. [2020-10-14 18:21:37,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-14 18:21:37,207 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 206 [2020-10-14 18:21:37,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:21:37,209 INFO L225 Difference]: With dead ends: 384 [2020-10-14 18:21:37,209 INFO L226 Difference]: Without dead ends: 301 [2020-10-14 18:21:37,210 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-14 18:21:37,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2020-10-14 18:21:37,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 293. [2020-10-14 18:21:37,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 293 states. [2020-10-14 18:21:37,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 370 transitions. [2020-10-14 18:21:37,223 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 370 transitions. Word has length 206 [2020-10-14 18:21:37,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:21:37,223 INFO L479 AbstractCegarLoop]: Abstraction has 293 states and 370 transitions. [2020-10-14 18:21:37,223 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-14 18:21:37,224 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 370 transitions. [2020-10-14 18:21:37,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2020-10-14 18:21:37,225 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:21:37,226 INFO L422 BasicCegarLoop]: trace histogram [26, 25, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:21:37,226 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-14 18:21:37,227 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:21:37,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:21:37,229 INFO L82 PathProgramCache]: Analyzing trace with hash 360772887, now seen corresponding path program 23 times [2020-10-14 18:21:37,230 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:21:37,230 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1205388340] [2020-10-14 18:21:37,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:21:37,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:37,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:37,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:42,276 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:42,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 222 [2020-10-14 18:21:42,277 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:21:42,277 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-14 18:21:42,277 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:42,277 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:42,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-14 18:21:42,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:21:42,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 127 [2020-10-14 18:21:42,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:21:42,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:21:42,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:42,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:42,752 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:42,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:21:42,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:21:42,753 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:21:42,753 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:42,753 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:42,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:21:42,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:21:42,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:21:42,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:21:42,790 INFO L134 CoverageAnalysis]: Checked inductivity of 2475 backedges. 0 proven. 1525 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2020-10-14 18:21:42,790 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1205388340] [2020-10-14 18:21:42,791 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:21:42,791 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-14 18:21:42,791 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228580856] [2020-10-14 18:21:42,791 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-14 18:21:42,791 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:21:42,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-14 18:21:42,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-14 18:21:42,792 INFO L87 Difference]: Start difference. First operand 293 states and 370 transitions. Second operand 29 states. [2020-10-14 18:21:43,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:21:43,448 INFO L93 Difference]: Finished difference Result 398 states and 484 transitions. [2020-10-14 18:21:43,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-14 18:21:43,449 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 214 [2020-10-14 18:21:43,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:21:43,451 INFO L225 Difference]: With dead ends: 398 [2020-10-14 18:21:43,452 INFO L226 Difference]: Without dead ends: 312 [2020-10-14 18:21:43,453 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-14 18:21:43,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2020-10-14 18:21:43,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 304. [2020-10-14 18:21:43,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2020-10-14 18:21:43,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 384 transitions. [2020-10-14 18:21:43,464 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 384 transitions. Word has length 214 [2020-10-14 18:21:43,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:21:43,464 INFO L479 AbstractCegarLoop]: Abstraction has 304 states and 384 transitions. [2020-10-14 18:21:43,464 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-14 18:21:43,464 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 384 transitions. [2020-10-14 18:21:43,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2020-10-14 18:21:43,466 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:21:43,466 INFO L422 BasicCegarLoop]: trace histogram [27, 26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:21:43,467 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-14 18:21:43,467 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:21:43,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:21:43,467 INFO L82 PathProgramCache]: Analyzing trace with hash -1084974931, now seen corresponding path program 24 times [2020-10-14 18:21:43,468 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:21:43,468 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [470957838] [2020-10-14 18:21:43,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:21:43,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:43,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:43,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:48,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:48,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 230 [2020-10-14 18:21:48,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:21:48,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-14 18:21:48,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:48,501 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:48,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-14 18:21:48,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:21:48,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 132 [2020-10-14 18:21:48,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:21:48,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:21:48,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:48,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:48,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:48,991 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:21:48,991 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:21:48,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:21:48,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:48,991 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:48,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:21:48,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:21:48,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:21:48,992 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:21:49,022 INFO L134 CoverageAnalysis]: Checked inductivity of 2678 backedges. 0 proven. 1651 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2020-10-14 18:21:49,022 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [470957838] [2020-10-14 18:21:49,022 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:21:49,022 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-14 18:21:49,023 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307222325] [2020-10-14 18:21:49,023 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-14 18:21:49,023 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:21:49,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-14 18:21:49,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-14 18:21:49,024 INFO L87 Difference]: Start difference. First operand 304 states and 384 transitions. Second operand 30 states. [2020-10-14 18:21:49,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:21:49,727 INFO L93 Difference]: Finished difference Result 412 states and 501 transitions. [2020-10-14 18:21:49,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-14 18:21:49,727 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 222 [2020-10-14 18:21:49,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:21:49,730 INFO L225 Difference]: With dead ends: 412 [2020-10-14 18:21:49,731 INFO L226 Difference]: Without dead ends: 323 [2020-10-14 18:21:49,732 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-14 18:21:49,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2020-10-14 18:21:49,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 315. [2020-10-14 18:21:49,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 315 states. [2020-10-14 18:21:49,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 398 transitions. [2020-10-14 18:21:49,745 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 398 transitions. Word has length 222 [2020-10-14 18:21:49,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:21:49,745 INFO L479 AbstractCegarLoop]: Abstraction has 315 states and 398 transitions. [2020-10-14 18:21:49,745 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-14 18:21:49,745 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 398 transitions. [2020-10-14 18:21:49,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2020-10-14 18:21:49,747 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:21:49,748 INFO L422 BasicCegarLoop]: trace histogram [28, 27, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:21:49,748 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-14 18:21:49,748 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:21:49,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:21:49,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1828138071, now seen corresponding path program 25 times [2020-10-14 18:21:49,749 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:21:49,749 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1362481148] [2020-10-14 18:21:49,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:21:49,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:49,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:50,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:54,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:54,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 238 [2020-10-14 18:21:54,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:21:54,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 18:21:54,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:54,790 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:54,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-14 18:21:54,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:21:54,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 137 [2020-10-14 18:21:54,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:21:55,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:21:55,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:55,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:55,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:21:55,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:21:55,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:21:55,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:21:55,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:21:55,320 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:21:55,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:21:55,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:21:55,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:21:55,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:21:55,349 INFO L134 CoverageAnalysis]: Checked inductivity of 2889 backedges. 0 proven. 1782 refuted. 0 times theorem prover too weak. 1107 trivial. 0 not checked. [2020-10-14 18:21:55,350 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1362481148] [2020-10-14 18:21:55,350 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:21:55,350 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-14 18:21:55,350 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629177272] [2020-10-14 18:21:55,351 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-14 18:21:55,351 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:21:55,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-14 18:21:55,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-14 18:21:55,351 INFO L87 Difference]: Start difference. First operand 315 states and 398 transitions. Second operand 31 states. [2020-10-14 18:21:56,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:21:56,093 INFO L93 Difference]: Finished difference Result 426 states and 518 transitions. [2020-10-14 18:21:56,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-14 18:21:56,094 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 230 [2020-10-14 18:21:56,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:21:56,098 INFO L225 Difference]: With dead ends: 426 [2020-10-14 18:21:56,099 INFO L226 Difference]: Without dead ends: 334 [2020-10-14 18:21:56,103 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-14 18:21:56,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2020-10-14 18:21:56,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 326. [2020-10-14 18:21:56,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 326 states. [2020-10-14 18:21:56,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 412 transitions. [2020-10-14 18:21:56,120 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 412 transitions. Word has length 230 [2020-10-14 18:21:56,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:21:56,121 INFO L479 AbstractCegarLoop]: Abstraction has 326 states and 412 transitions. [2020-10-14 18:21:56,121 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-14 18:21:56,121 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 412 transitions. [2020-10-14 18:21:56,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2020-10-14 18:21:56,124 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:21:56,125 INFO L422 BasicCegarLoop]: trace histogram [29, 28, 28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:21:56,125 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-14 18:21:56,126 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:21:56,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:21:56,126 INFO L82 PathProgramCache]: Analyzing trace with hash -1856575635, now seen corresponding path program 26 times [2020-10-14 18:21:56,127 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:21:56,127 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [888804269] [2020-10-14 18:21:56,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:21:56,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:21:56,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:21:57,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:22:01,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:22:01,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 246 [2020-10-14 18:22:01,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:22:01,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-14 18:22:01,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:22:01,182 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:22:01,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-14 18:22:01,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:22:01,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 142 [2020-10-14 18:22:01,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:22:01,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:22:01,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:22:01,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:22:01,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:22:01,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:22:01,746 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:22:01,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:22:01,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:22:01,746 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:22:01,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:22:01,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:22:01,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:22:01,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:22:01,775 INFO L134 CoverageAnalysis]: Checked inductivity of 3108 backedges. 0 proven. 1918 refuted. 0 times theorem prover too weak. 1190 trivial. 0 not checked. [2020-10-14 18:22:01,776 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [888804269] [2020-10-14 18:22:01,776 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:22:01,776 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-14 18:22:01,776 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896714095] [2020-10-14 18:22:01,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-14 18:22:01,777 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:22:01,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-14 18:22:01,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-14 18:22:01,778 INFO L87 Difference]: Start difference. First operand 326 states and 412 transitions. Second operand 32 states. [2020-10-14 18:22:02,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:22:02,525 INFO L93 Difference]: Finished difference Result 440 states and 535 transitions. [2020-10-14 18:22:02,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-14 18:22:02,525 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 238 [2020-10-14 18:22:02,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:22:02,528 INFO L225 Difference]: With dead ends: 440 [2020-10-14 18:22:02,528 INFO L226 Difference]: Without dead ends: 345 [2020-10-14 18:22:02,529 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-14 18:22:02,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2020-10-14 18:22:02,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 337. [2020-10-14 18:22:02,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 337 states. [2020-10-14 18:22:02,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 426 transitions. [2020-10-14 18:22:02,541 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 426 transitions. Word has length 238 [2020-10-14 18:22:02,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:22:02,541 INFO L479 AbstractCegarLoop]: Abstraction has 337 states and 426 transitions. [2020-10-14 18:22:02,541 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-14 18:22:02,541 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 426 transitions. [2020-10-14 18:22:02,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2020-10-14 18:22:02,543 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:22:02,543 INFO L422 BasicCegarLoop]: trace histogram [30, 29, 29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:22:02,543 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-14 18:22:02,544 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:22:02,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:22:02,544 INFO L82 PathProgramCache]: Analyzing trace with hash -1964100713, now seen corresponding path program 27 times [2020-10-14 18:22:02,544 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:22:02,545 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [249688825] [2020-10-14 18:22:02,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:22:02,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:22:02,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:22:03,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:22:07,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:22:07,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 254 [2020-10-14 18:22:07,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:22:07,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-14 18:22:07,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:22:07,593 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:22:07,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-14 18:22:07,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:22:07,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 147 [2020-10-14 18:22:07,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:22:08,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:22:08,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:22:08,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:22:08,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:22:08,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:22:08,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:22:08,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 18:22:08,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:22:08,233 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:22:08,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:22:08,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:22:08,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:22:08,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:22:08,275 INFO L134 CoverageAnalysis]: Checked inductivity of 3335 backedges. 0 proven. 2059 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2020-10-14 18:22:08,276 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [249688825] [2020-10-14 18:22:08,276 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:22:08,276 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-14 18:22:08,276 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888864504] [2020-10-14 18:22:08,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-14 18:22:08,277 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:22:08,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-14 18:22:08,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 18:22:08,278 INFO L87 Difference]: Start difference. First operand 337 states and 426 transitions. Second operand 33 states. [2020-10-14 18:22:09,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:22:09,101 INFO L93 Difference]: Finished difference Result 454 states and 552 transitions. [2020-10-14 18:22:09,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-14 18:22:09,101 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 246 [2020-10-14 18:22:09,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:22:09,105 INFO L225 Difference]: With dead ends: 454 [2020-10-14 18:22:09,105 INFO L226 Difference]: Without dead ends: 356 [2020-10-14 18:22:09,107 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 18:22:09,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2020-10-14 18:22:09,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 348. [2020-10-14 18:22:09,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 348 states. [2020-10-14 18:22:09,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 440 transitions. [2020-10-14 18:22:09,122 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 440 transitions. Word has length 246 [2020-10-14 18:22:09,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:22:09,123 INFO L479 AbstractCegarLoop]: Abstraction has 348 states and 440 transitions. [2020-10-14 18:22:09,123 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-14 18:22:09,123 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 440 transitions. [2020-10-14 18:22:09,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2020-10-14 18:22:09,126 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:22:09,126 INFO L422 BasicCegarLoop]: trace histogram [31, 30, 30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:22:09,127 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-14 18:22:09,127 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:22:09,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:22:09,128 INFO L82 PathProgramCache]: Analyzing trace with hash -1475713491, now seen corresponding path program 28 times [2020-10-14 18:22:09,128 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:22:09,128 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1223078321] [2020-10-14 18:22:09,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:22:09,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:22:09,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:22:10,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:22:14,186 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:22:14,186 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 262 [2020-10-14 18:22:14,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:22:14,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-14 18:22:14,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:22:14,187 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:22:14,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-14 18:22:14,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:22:14,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 152 [2020-10-14 18:22:14,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:22:14,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:22:14,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:22:14,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:22:14,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:22:14,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:22:14,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:22:14,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 18:22:14,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:22:14,889 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:22:14,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:22:14,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:22:14,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:22:14,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 18:22:14,963 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 2205 refuted. 0 times theorem prover too weak. 1365 trivial. 0 not checked. [2020-10-14 18:22:14,964 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1223078321] [2020-10-14 18:22:14,965 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:22:14,965 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-14 18:22:14,965 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855592734] [2020-10-14 18:22:14,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-14 18:22:14,966 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:22:14,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-14 18:22:14,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-14 18:22:14,968 INFO L87 Difference]: Start difference. First operand 348 states and 440 transitions. Second operand 34 states. [2020-10-14 18:22:15,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:22:15,822 INFO L93 Difference]: Finished difference Result 468 states and 569 transitions. [2020-10-14 18:22:15,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-14 18:22:15,823 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 254 [2020-10-14 18:22:15,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:22:15,825 INFO L225 Difference]: With dead ends: 468 [2020-10-14 18:22:15,826 INFO L226 Difference]: Without dead ends: 367 [2020-10-14 18:22:15,827 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-14 18:22:15,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2020-10-14 18:22:15,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 359. [2020-10-14 18:22:15,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 359 states. [2020-10-14 18:22:15,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 454 transitions. [2020-10-14 18:22:15,840 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 454 transitions. Word has length 254 [2020-10-14 18:22:15,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:22:15,841 INFO L479 AbstractCegarLoop]: Abstraction has 359 states and 454 transitions. [2020-10-14 18:22:15,841 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-14 18:22:15,841 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 454 transitions. [2020-10-14 18:22:15,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2020-10-14 18:22:15,844 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:22:15,844 INFO L422 BasicCegarLoop]: trace histogram [32, 31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:22:15,845 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-14 18:22:15,845 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:22:15,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:22:15,845 INFO L82 PathProgramCache]: Analyzing trace with hash -922088745, now seen corresponding path program 29 times [2020-10-14 18:22:15,845 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:22:15,846 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1316684590] [2020-10-14 18:22:15,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:22:15,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:22:15,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:22:16,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:22:20,885 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:22:20,886 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 270 [2020-10-14 18:22:20,886 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:22:20,886 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 18:22:20,886 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:22:20,886 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:22:20,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-14 18:22:20,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:22:20,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 157 [2020-10-14 18:22:20,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:22:21,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:22:21,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:22:21,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:22:21,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:22:21,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:22:21,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:22:21,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:22:21,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:22:21,585 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:22:21,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:22:21,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:22:21,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:22:21,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:22:21,622 INFO L134 CoverageAnalysis]: Checked inductivity of 3813 backedges. 0 proven. 2356 refuted. 0 times theorem prover too weak. 1457 trivial. 0 not checked. [2020-10-14 18:22:21,622 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1316684590] [2020-10-14 18:22:21,622 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:22:21,622 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-14 18:22:21,622 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163726007] [2020-10-14 18:22:21,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-14 18:22:21,623 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:22:21,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-14 18:22:21,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-14 18:22:21,624 INFO L87 Difference]: Start difference. First operand 359 states and 454 transitions. Second operand 35 states. [2020-10-14 18:22:22,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:22:22,576 INFO L93 Difference]: Finished difference Result 482 states and 586 transitions. [2020-10-14 18:22:22,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-14 18:22:22,577 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 262 [2020-10-14 18:22:22,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:22:22,580 INFO L225 Difference]: With dead ends: 482 [2020-10-14 18:22:22,580 INFO L226 Difference]: Without dead ends: 378 [2020-10-14 18:22:22,581 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-14 18:22:22,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2020-10-14 18:22:22,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 370. [2020-10-14 18:22:22,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 370 states. [2020-10-14 18:22:22,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 468 transitions. [2020-10-14 18:22:22,593 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 468 transitions. Word has length 262 [2020-10-14 18:22:22,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:22:22,594 INFO L479 AbstractCegarLoop]: Abstraction has 370 states and 468 transitions. [2020-10-14 18:22:22,594 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-14 18:22:22,594 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 468 transitions. [2020-10-14 18:22:22,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2020-10-14 18:22:22,596 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:22:22,596 INFO L422 BasicCegarLoop]: trace histogram [33, 32, 32, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:22:22,597 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-14 18:22:22,597 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:22:22,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:22:22,597 INFO L82 PathProgramCache]: Analyzing trace with hash -817163027, now seen corresponding path program 30 times [2020-10-14 18:22:22,597 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:22:22,598 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1181522832] [2020-10-14 18:22:22,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:22:22,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:22:22,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:22:23,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:22:27,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:22:27,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 278 [2020-10-14 18:22:27,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:22:27,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-14 18:22:27,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:22:27,651 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:22:27,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-14 18:22:27,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:22:27,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 162 [2020-10-14 18:22:27,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:22:28,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:22:28,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:22:28,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:22:28,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:22:28,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:22:28,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:22:28,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:22:28,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:22:28,376 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:22:28,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:22:28,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:22:28,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:22:28,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:22:28,414 INFO L134 CoverageAnalysis]: Checked inductivity of 4064 backedges. 0 proven. 2512 refuted. 0 times theorem prover too weak. 1552 trivial. 0 not checked. [2020-10-14 18:22:28,414 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1181522832] [2020-10-14 18:22:28,414 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:22:28,414 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-14 18:22:28,414 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264544917] [2020-10-14 18:22:28,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-14 18:22:28,415 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:22:28,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-14 18:22:28,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-14 18:22:28,416 INFO L87 Difference]: Start difference. First operand 370 states and 468 transitions. Second operand 36 states. [2020-10-14 18:22:29,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:22:29,399 INFO L93 Difference]: Finished difference Result 496 states and 603 transitions. [2020-10-14 18:22:29,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-14 18:22:29,399 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 270 [2020-10-14 18:22:29,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:22:29,402 INFO L225 Difference]: With dead ends: 496 [2020-10-14 18:22:29,403 INFO L226 Difference]: Without dead ends: 389 [2020-10-14 18:22:29,405 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-14 18:22:29,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2020-10-14 18:22:29,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 381. [2020-10-14 18:22:29,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 381 states. [2020-10-14 18:22:29,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 482 transitions. [2020-10-14 18:22:29,418 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 482 transitions. Word has length 270 [2020-10-14 18:22:29,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:22:29,419 INFO L479 AbstractCegarLoop]: Abstraction has 381 states and 482 transitions. [2020-10-14 18:22:29,419 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-14 18:22:29,419 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 482 transitions. [2020-10-14 18:22:29,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2020-10-14 18:22:29,421 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:22:29,421 INFO L422 BasicCegarLoop]: trace histogram [34, 33, 33, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:22:29,422 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-14 18:22:29,422 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:22:29,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:22:29,422 INFO L82 PathProgramCache]: Analyzing trace with hash -1242648041, now seen corresponding path program 31 times [2020-10-14 18:22:29,423 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:22:29,425 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1486513861] [2020-10-14 18:22:29,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:22:29,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:22:29,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:22:30,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:22:34,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:22:34,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 286 [2020-10-14 18:22:34,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:22:34,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-14 18:22:34,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:22:34,476 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:22:34,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-14 18:22:34,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:22:34,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 167 [2020-10-14 18:22:34,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:22:35,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:22:35,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:22:35,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:22:35,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:22:35,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:22:35,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:22:35,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:22:35,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:22:35,267 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:22:35,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:22:35,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:22:35,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:22:35,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:22:35,307 INFO L134 CoverageAnalysis]: Checked inductivity of 4323 backedges. 0 proven. 2673 refuted. 0 times theorem prover too weak. 1650 trivial. 0 not checked. [2020-10-14 18:22:35,307 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1486513861] [2020-10-14 18:22:35,307 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:22:35,307 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-14 18:22:35,308 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070816229] [2020-10-14 18:22:35,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-14 18:22:35,308 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:22:35,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-14 18:22:35,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-14 18:22:35,309 INFO L87 Difference]: Start difference. First operand 381 states and 482 transitions. Second operand 37 states. [2020-10-14 18:22:36,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:22:36,322 INFO L93 Difference]: Finished difference Result 510 states and 620 transitions. [2020-10-14 18:22:36,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-14 18:22:36,323 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 278 [2020-10-14 18:22:36,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:22:36,326 INFO L225 Difference]: With dead ends: 510 [2020-10-14 18:22:36,327 INFO L226 Difference]: Without dead ends: 400 [2020-10-14 18:22:36,328 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-14 18:22:36,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2020-10-14 18:22:36,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 392. [2020-10-14 18:22:36,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 392 states. [2020-10-14 18:22:36,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 496 transitions. [2020-10-14 18:22:36,340 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 496 transitions. Word has length 278 [2020-10-14 18:22:36,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:22:36,341 INFO L479 AbstractCegarLoop]: Abstraction has 392 states and 496 transitions. [2020-10-14 18:22:36,341 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-14 18:22:36,341 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 496 transitions. [2020-10-14 18:22:36,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2020-10-14 18:22:36,343 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:22:36,343 INFO L422 BasicCegarLoop]: trace histogram [35, 34, 34, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:22:36,344 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-14 18:22:36,344 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:22:36,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:22:36,344 INFO L82 PathProgramCache]: Analyzing trace with hash 2113205165, now seen corresponding path program 32 times [2020-10-14 18:22:36,345 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:22:36,345 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1071058024] [2020-10-14 18:22:36,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:22:36,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:22:36,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:22:36,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:22:41,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:22:41,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 294 [2020-10-14 18:22:41,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:22:41,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-14 18:22:41,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:22:41,395 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:22:41,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-14 18:22:41,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:22:41,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 172 [2020-10-14 18:22:41,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:22:42,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:22:42,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:22:42,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:22:42,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:22:42,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:22:42,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:22:42,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:22:42,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:22:42,213 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:22:42,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:22:42,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:22:42,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:22:42,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:22:42,263 INFO L134 CoverageAnalysis]: Checked inductivity of 4590 backedges. 0 proven. 2839 refuted. 0 times theorem prover too weak. 1751 trivial. 0 not checked. [2020-10-14 18:22:42,264 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1071058024] [2020-10-14 18:22:42,264 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:22:42,264 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-14 18:22:42,264 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786420645] [2020-10-14 18:22:42,265 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-14 18:22:42,265 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:22:42,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-14 18:22:42,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-14 18:22:42,266 INFO L87 Difference]: Start difference. First operand 392 states and 496 transitions. Second operand 38 states. [2020-10-14 18:22:43,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:22:43,227 INFO L93 Difference]: Finished difference Result 524 states and 637 transitions. [2020-10-14 18:22:43,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-14 18:22:43,228 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 286 [2020-10-14 18:22:43,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:22:43,231 INFO L225 Difference]: With dead ends: 524 [2020-10-14 18:22:43,231 INFO L226 Difference]: Without dead ends: 411 [2020-10-14 18:22:43,234 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-14 18:22:43,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2020-10-14 18:22:43,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 403. [2020-10-14 18:22:43,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 403 states. [2020-10-14 18:22:43,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 510 transitions. [2020-10-14 18:22:43,246 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 510 transitions. Word has length 286 [2020-10-14 18:22:43,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:22:43,247 INFO L479 AbstractCegarLoop]: Abstraction has 403 states and 510 transitions. [2020-10-14 18:22:43,247 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-14 18:22:43,248 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 510 transitions. [2020-10-14 18:22:43,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2020-10-14 18:22:43,250 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:22:43,250 INFO L422 BasicCegarLoop]: trace histogram [36, 35, 35, 35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:22:43,251 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-14 18:22:43,251 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:22:43,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:22:43,252 INFO L82 PathProgramCache]: Analyzing trace with hash 1430268247, now seen corresponding path program 33 times [2020-10-14 18:22:43,252 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:22:43,252 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1788139384] [2020-10-14 18:22:43,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:22:43,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:22:43,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:22:44,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:22:48,295 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:22:48,295 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 302 [2020-10-14 18:22:48,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:22:48,295 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-14 18:22:48,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:22:48,295 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:22:48,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-14 18:22:48,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:22:48,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 177 [2020-10-14 18:22:48,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:22:49,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:22:49,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:22:49,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:22:49,143 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:22:49,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:22:49,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:22:49,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:22:49,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:22:49,144 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:22:49,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:22:49,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:22:49,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:22:49,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:22:49,190 INFO L134 CoverageAnalysis]: Checked inductivity of 4865 backedges. 0 proven. 3010 refuted. 0 times theorem prover too weak. 1855 trivial. 0 not checked. [2020-10-14 18:22:49,191 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1788139384] [2020-10-14 18:22:49,191 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:22:49,191 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-14 18:22:49,191 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777523170] [2020-10-14 18:22:49,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-14 18:22:49,192 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:22:49,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-14 18:22:49,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-14 18:22:49,193 INFO L87 Difference]: Start difference. First operand 403 states and 510 transitions. Second operand 39 states. [2020-10-14 18:22:50,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:22:50,231 INFO L93 Difference]: Finished difference Result 538 states and 654 transitions. [2020-10-14 18:22:50,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-14 18:22:50,232 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 294 [2020-10-14 18:22:50,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:22:50,236 INFO L225 Difference]: With dead ends: 538 [2020-10-14 18:22:50,236 INFO L226 Difference]: Without dead ends: 422 [2020-10-14 18:22:50,238 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-14 18:22:50,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2020-10-14 18:22:50,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 414. [2020-10-14 18:22:50,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 414 states. [2020-10-14 18:22:50,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 524 transitions. [2020-10-14 18:22:50,251 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 524 transitions. Word has length 294 [2020-10-14 18:22:50,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:22:50,252 INFO L479 AbstractCegarLoop]: Abstraction has 414 states and 524 transitions. [2020-10-14 18:22:50,252 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-14 18:22:50,252 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 524 transitions. [2020-10-14 18:22:50,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2020-10-14 18:22:50,254 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:22:50,255 INFO L422 BasicCegarLoop]: trace histogram [37, 36, 36, 36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:22:50,255 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-14 18:22:50,255 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:22:50,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:22:50,256 INFO L82 PathProgramCache]: Analyzing trace with hash -1780219283, now seen corresponding path program 34 times [2020-10-14 18:22:50,256 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:22:50,256 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [363923369] [2020-10-14 18:22:50,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:22:50,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:22:50,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:22:51,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:22:55,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:22:55,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 310 [2020-10-14 18:22:55,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:22:55,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 18:22:55,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:22:55,301 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:22:55,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-14 18:22:55,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:22:55,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 182 [2020-10-14 18:22:55,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:22:56,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:22:56,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:22:56,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:22:56,143 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:22:56,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:22:56,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:22:56,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:22:56,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:22:56,144 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:22:56,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:22:56,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:22:56,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:22:56,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:22:56,190 INFO L134 CoverageAnalysis]: Checked inductivity of 5148 backedges. 0 proven. 3186 refuted. 0 times theorem prover too weak. 1962 trivial. 0 not checked. [2020-10-14 18:22:56,191 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [363923369] [2020-10-14 18:22:56,191 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:22:56,191 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-14 18:22:56,191 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720712354] [2020-10-14 18:22:56,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-14 18:22:56,192 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:22:56,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-14 18:22:56,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-14 18:22:56,193 INFO L87 Difference]: Start difference. First operand 414 states and 524 transitions. Second operand 40 states. [2020-10-14 18:22:56,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:22:56,998 INFO L93 Difference]: Finished difference Result 552 states and 671 transitions. [2020-10-14 18:22:56,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-14 18:22:56,998 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 302 [2020-10-14 18:22:56,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:22:57,001 INFO L225 Difference]: With dead ends: 552 [2020-10-14 18:22:57,001 INFO L226 Difference]: Without dead ends: 433 [2020-10-14 18:22:57,002 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-14 18:22:57,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2020-10-14 18:22:57,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 425. [2020-10-14 18:22:57,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 425 states. [2020-10-14 18:22:57,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 538 transitions. [2020-10-14 18:22:57,011 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 538 transitions. Word has length 302 [2020-10-14 18:22:57,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:22:57,012 INFO L479 AbstractCegarLoop]: Abstraction has 425 states and 538 transitions. [2020-10-14 18:22:57,012 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-14 18:22:57,012 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 538 transitions. [2020-10-14 18:22:57,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2020-10-14 18:22:57,014 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:22:57,015 INFO L422 BasicCegarLoop]: trace histogram [38, 37, 37, 37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:22:57,015 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-14 18:22:57,015 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:22:57,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:22:57,015 INFO L82 PathProgramCache]: Analyzing trace with hash 1604481175, now seen corresponding path program 35 times [2020-10-14 18:22:57,016 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:22:57,016 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1137403138] [2020-10-14 18:22:57,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:22:57,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:22:57,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:22:57,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:23:02,074 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:23:02,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 318 [2020-10-14 18:23:02,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:23:02,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-14 18:23:02,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:23:02,074 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:23:02,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-14 18:23:02,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:23:02,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 187 [2020-10-14 18:23:02,075 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:23:03,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:23:03,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:23:03,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:23:03,024 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:23:03,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:23:03,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:23:03,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:23:03,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:23:03,025 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:23:03,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:23:03,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:23:03,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:23:03,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:23:03,074 INFO L134 CoverageAnalysis]: Checked inductivity of 5439 backedges. 0 proven. 3367 refuted. 0 times theorem prover too weak. 2072 trivial. 0 not checked. [2020-10-14 18:23:03,074 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1137403138] [2020-10-14 18:23:03,074 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:23:03,075 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-14 18:23:03,075 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96473516] [2020-10-14 18:23:03,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-14 18:23:03,075 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:23:03,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-14 18:23:03,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-14 18:23:03,076 INFO L87 Difference]: Start difference. First operand 425 states and 538 transitions. Second operand 41 states. [2020-10-14 18:23:03,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:23:03,941 INFO L93 Difference]: Finished difference Result 566 states and 688 transitions. [2020-10-14 18:23:03,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-14 18:23:03,942 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 310 [2020-10-14 18:23:03,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:23:03,945 INFO L225 Difference]: With dead ends: 566 [2020-10-14 18:23:03,945 INFO L226 Difference]: Without dead ends: 444 [2020-10-14 18:23:03,946 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-14 18:23:03,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2020-10-14 18:23:03,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 436. [2020-10-14 18:23:03,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 436 states. [2020-10-14 18:23:03,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 552 transitions. [2020-10-14 18:23:03,955 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 552 transitions. Word has length 310 [2020-10-14 18:23:03,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:23:03,956 INFO L479 AbstractCegarLoop]: Abstraction has 436 states and 552 transitions. [2020-10-14 18:23:03,956 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-14 18:23:03,956 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 552 transitions. [2020-10-14 18:23:03,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2020-10-14 18:23:03,958 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:23:03,958 INFO L422 BasicCegarLoop]: trace histogram [39, 38, 38, 38, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:23:03,959 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-14 18:23:03,959 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:23:03,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:23:03,959 INFO L82 PathProgramCache]: Analyzing trace with hash 603210029, now seen corresponding path program 36 times [2020-10-14 18:23:03,959 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:23:03,959 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [377068798] [2020-10-14 18:23:03,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:23:03,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:23:04,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:23:04,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:23:08,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:23:08,998 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 326 [2020-10-14 18:23:08,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:23:08,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-14 18:23:08,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:23:08,999 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:23:08,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-14 18:23:08,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:23:08,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 192 [2020-10-14 18:23:08,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:23:09,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:23:09,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:23:09,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:23:09,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:23:09,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:23:09,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:23:09,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:23:09,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:23:09,998 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:23:09,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:23:09,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:23:09,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:23:09,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:23:10,051 INFO L134 CoverageAnalysis]: Checked inductivity of 5738 backedges. 0 proven. 3553 refuted. 0 times theorem prover too weak. 2185 trivial. 0 not checked. [2020-10-14 18:23:10,052 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [377068798] [2020-10-14 18:23:10,052 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:23:10,052 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-14 18:23:10,052 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761415808] [2020-10-14 18:23:10,053 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-14 18:23:10,053 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:23:10,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-14 18:23:10,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-14 18:23:10,054 INFO L87 Difference]: Start difference. First operand 436 states and 552 transitions. Second operand 42 states. [2020-10-14 18:23:11,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:23:11,213 INFO L93 Difference]: Finished difference Result 580 states and 705 transitions. [2020-10-14 18:23:11,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-14 18:23:11,214 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 318 [2020-10-14 18:23:11,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:23:11,217 INFO L225 Difference]: With dead ends: 580 [2020-10-14 18:23:11,217 INFO L226 Difference]: Without dead ends: 455 [2020-10-14 18:23:11,218 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-14 18:23:11,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2020-10-14 18:23:11,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 447. [2020-10-14 18:23:11,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 447 states. [2020-10-14 18:23:11,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 566 transitions. [2020-10-14 18:23:11,231 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 566 transitions. Word has length 318 [2020-10-14 18:23:11,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:23:11,232 INFO L479 AbstractCegarLoop]: Abstraction has 447 states and 566 transitions. [2020-10-14 18:23:11,232 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-14 18:23:11,232 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 566 transitions. [2020-10-14 18:23:11,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-10-14 18:23:11,235 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:23:11,235 INFO L422 BasicCegarLoop]: trace histogram [40, 39, 39, 39, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:23:11,235 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-14 18:23:11,236 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:23:11,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:23:11,236 INFO L82 PathProgramCache]: Analyzing trace with hash -2101770281, now seen corresponding path program 37 times [2020-10-14 18:23:11,236 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:23:11,236 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1212466230] [2020-10-14 18:23:11,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:23:11,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:23:11,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:23:11,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:23:16,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:23:16,287 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 334 [2020-10-14 18:23:16,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:23:16,287 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-14 18:23:16,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:23:16,288 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:23:16,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-14 18:23:16,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:23:16,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 197 [2020-10-14 18:23:16,288 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:23:17,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:23:17,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:23:17,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:23:17,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:23:17,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:23:17,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:23:17,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:23:17,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:23:17,268 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:23:17,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:23:17,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:23:17,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:23:17,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:23:17,327 INFO L134 CoverageAnalysis]: Checked inductivity of 6045 backedges. 0 proven. 3744 refuted. 0 times theorem prover too weak. 2301 trivial. 0 not checked. [2020-10-14 18:23:17,327 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1212466230] [2020-10-14 18:23:17,328 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:23:17,328 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-14 18:23:17,328 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624311839] [2020-10-14 18:23:17,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-14 18:23:17,328 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:23:17,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-14 18:23:17,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-14 18:23:17,330 INFO L87 Difference]: Start difference. First operand 447 states and 566 transitions. Second operand 43 states. [2020-10-14 18:23:18,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:23:18,205 INFO L93 Difference]: Finished difference Result 594 states and 722 transitions. [2020-10-14 18:23:18,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-14 18:23:18,206 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 326 [2020-10-14 18:23:18,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:23:18,209 INFO L225 Difference]: With dead ends: 594 [2020-10-14 18:23:18,209 INFO L226 Difference]: Without dead ends: 466 [2020-10-14 18:23:18,211 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-14 18:23:18,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2020-10-14 18:23:18,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 458. [2020-10-14 18:23:18,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 458 states. [2020-10-14 18:23:18,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 580 transitions. [2020-10-14 18:23:18,225 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 580 transitions. Word has length 326 [2020-10-14 18:23:18,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:23:18,225 INFO L479 AbstractCegarLoop]: Abstraction has 458 states and 580 transitions. [2020-10-14 18:23:18,226 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-14 18:23:18,226 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 580 transitions. [2020-10-14 18:23:18,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-10-14 18:23:18,228 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:23:18,228 INFO L422 BasicCegarLoop]: trace histogram [41, 40, 40, 40, 40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:23:18,228 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-14 18:23:18,228 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:23:18,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:23:18,229 INFO L82 PathProgramCache]: Analyzing trace with hash 536981485, now seen corresponding path program 38 times [2020-10-14 18:23:18,229 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:23:18,229 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [415035965] [2020-10-14 18:23:18,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:23:18,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:23:18,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:23:19,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:23:23,276 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:23:23,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 342 [2020-10-14 18:23:23,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:23:23,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-14 18:23:23,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:23:23,276 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:23:23,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-14 18:23:23,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:23:23,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 202 [2020-10-14 18:23:23,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:23:24,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:23:24,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:23:24,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:23:24,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:23:24,322 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:23:24,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:23:24,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:23:24,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:23:24,322 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:23:24,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:23:24,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:23:24,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:23:24,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:23:24,375 INFO L134 CoverageAnalysis]: Checked inductivity of 6360 backedges. 0 proven. 3940 refuted. 0 times theorem prover too weak. 2420 trivial. 0 not checked. [2020-10-14 18:23:24,376 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [415035965] [2020-10-14 18:23:24,376 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:23:24,376 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-14 18:23:24,376 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907746731] [2020-10-14 18:23:24,376 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-14 18:23:24,376 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:23:24,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-14 18:23:24,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-14 18:23:24,377 INFO L87 Difference]: Start difference. First operand 458 states and 580 transitions. Second operand 44 states. [2020-10-14 18:23:25,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:23:25,446 INFO L93 Difference]: Finished difference Result 608 states and 739 transitions. [2020-10-14 18:23:25,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-14 18:23:25,446 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 334 [2020-10-14 18:23:25,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:23:25,449 INFO L225 Difference]: With dead ends: 608 [2020-10-14 18:23:25,450 INFO L226 Difference]: Without dead ends: 477 [2020-10-14 18:23:25,451 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-14 18:23:25,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2020-10-14 18:23:25,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 469. [2020-10-14 18:23:25,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 469 states. [2020-10-14 18:23:25,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 594 transitions. [2020-10-14 18:23:25,459 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 594 transitions. Word has length 334 [2020-10-14 18:23:25,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:23:25,460 INFO L479 AbstractCegarLoop]: Abstraction has 469 states and 594 transitions. [2020-10-14 18:23:25,460 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-14 18:23:25,460 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 594 transitions. [2020-10-14 18:23:25,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2020-10-14 18:23:25,462 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:23:25,462 INFO L422 BasicCegarLoop]: trace histogram [42, 41, 41, 41, 41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:23:25,462 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-14 18:23:25,462 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:23:25,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:23:25,463 INFO L82 PathProgramCache]: Analyzing trace with hash -1591120105, now seen corresponding path program 39 times [2020-10-14 18:23:25,463 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:23:25,463 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1970986659] [2020-10-14 18:23:25,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:23:25,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:23:25,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:23:26,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:23:30,507 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:23:30,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 350 [2020-10-14 18:23:30,508 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:23:30,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-14 18:23:30,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:23:30,508 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:23:30,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-14 18:23:30,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:23:30,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 207 [2020-10-14 18:23:30,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:23:31,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:23:31,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:23:31,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:23:31,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:23:31,609 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:23:31,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:23:31,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:23:31,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:23:31,610 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:23:31,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:23:31,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:23:31,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:23:31,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:23:31,665 INFO L134 CoverageAnalysis]: Checked inductivity of 6683 backedges. 0 proven. 4141 refuted. 0 times theorem prover too weak. 2542 trivial. 0 not checked. [2020-10-14 18:23:31,666 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1970986659] [2020-10-14 18:23:31,666 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:23:31,666 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-14 18:23:31,666 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079055393] [2020-10-14 18:23:31,667 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-14 18:23:31,667 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:23:31,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-14 18:23:31,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-14 18:23:31,668 INFO L87 Difference]: Start difference. First operand 469 states and 594 transitions. Second operand 45 states. [2020-10-14 18:23:32,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:23:32,804 INFO L93 Difference]: Finished difference Result 622 states and 756 transitions. [2020-10-14 18:23:32,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-14 18:23:32,804 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 342 [2020-10-14 18:23:32,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:23:32,807 INFO L225 Difference]: With dead ends: 622 [2020-10-14 18:23:32,808 INFO L226 Difference]: Without dead ends: 488 [2020-10-14 18:23:32,809 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-14 18:23:32,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2020-10-14 18:23:32,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 480. [2020-10-14 18:23:32,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 480 states. [2020-10-14 18:23:32,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 608 transitions. [2020-10-14 18:23:32,819 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 608 transitions. Word has length 342 [2020-10-14 18:23:32,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:23:32,820 INFO L479 AbstractCegarLoop]: Abstraction has 480 states and 608 transitions. [2020-10-14 18:23:32,820 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-14 18:23:32,820 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 608 transitions. [2020-10-14 18:23:32,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2020-10-14 18:23:32,822 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:23:32,823 INFO L422 BasicCegarLoop]: trace histogram [43, 42, 42, 42, 42, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:23:32,823 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-14 18:23:32,823 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:23:32,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:23:32,824 INFO L82 PathProgramCache]: Analyzing trace with hash 753421997, now seen corresponding path program 40 times [2020-10-14 18:23:32,824 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:23:32,824 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [533240330] [2020-10-14 18:23:32,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:23:32,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:23:32,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:23:34,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:23:37,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:23:37,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 358 [2020-10-14 18:23:37,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:23:37,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-14 18:23:37,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:23:37,873 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:23:37,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-14 18:23:37,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:23:37,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 212 [2020-10-14 18:23:37,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:23:39,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:23:39,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:23:39,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:23:39,033 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:23:39,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:23:39,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:23:39,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:23:39,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:23:39,033 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:23:39,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:23:39,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:23:39,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:23:39,034 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:23:39,092 INFO L134 CoverageAnalysis]: Checked inductivity of 7014 backedges. 0 proven. 4347 refuted. 0 times theorem prover too weak. 2667 trivial. 0 not checked. [2020-10-14 18:23:39,092 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [533240330] [2020-10-14 18:23:39,092 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:23:39,093 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-14 18:23:39,093 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868817818] [2020-10-14 18:23:39,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-14 18:23:39,094 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:23:39,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-14 18:23:39,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-14 18:23:39,095 INFO L87 Difference]: Start difference. First operand 480 states and 608 transitions. Second operand 46 states. [2020-10-14 18:23:40,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:23:40,147 INFO L93 Difference]: Finished difference Result 636 states and 773 transitions. [2020-10-14 18:23:40,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-14 18:23:40,148 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 350 [2020-10-14 18:23:40,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:23:40,151 INFO L225 Difference]: With dead ends: 636 [2020-10-14 18:23:40,151 INFO L226 Difference]: Without dead ends: 499 [2020-10-14 18:23:40,152 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-14 18:23:40,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2020-10-14 18:23:40,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 491. [2020-10-14 18:23:40,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 491 states. [2020-10-14 18:23:40,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 622 transitions. [2020-10-14 18:23:40,161 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 622 transitions. Word has length 350 [2020-10-14 18:23:40,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:23:40,161 INFO L479 AbstractCegarLoop]: Abstraction has 491 states and 622 transitions. [2020-10-14 18:23:40,161 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-14 18:23:40,161 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 622 transitions. [2020-10-14 18:23:40,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 359 [2020-10-14 18:23:40,164 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:23:40,164 INFO L422 BasicCegarLoop]: trace histogram [44, 43, 43, 43, 43, 43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:23:40,164 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-14 18:23:40,164 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:23:40,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:23:40,165 INFO L82 PathProgramCache]: Analyzing trace with hash 311830103, now seen corresponding path program 41 times [2020-10-14 18:23:40,165 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:23:40,165 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [947727692] [2020-10-14 18:23:40,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:23:40,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:23:40,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:23:41,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:23:45,216 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:23:45,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 366 [2020-10-14 18:23:45,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:23:45,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-14 18:23:45,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:23:45,216 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:23:45,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-14 18:23:45,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:23:45,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 217 [2020-10-14 18:23:45,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:23:46,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:23:46,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:23:46,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:23:46,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:23:46,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:23:46,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:23:46,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:23:46,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:23:46,419 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:23:46,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:23:46,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:23:46,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:23:46,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:23:46,515 INFO L134 CoverageAnalysis]: Checked inductivity of 7353 backedges. 0 proven. 4558 refuted. 0 times theorem prover too weak. 2795 trivial. 0 not checked. [2020-10-14 18:23:46,516 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [947727692] [2020-10-14 18:23:46,516 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:23:46,516 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-14 18:23:46,516 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578316765] [2020-10-14 18:23:46,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-14 18:23:46,517 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:23:46,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-14 18:23:46,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-14 18:23:46,518 INFO L87 Difference]: Start difference. First operand 491 states and 622 transitions. Second operand 47 states. [2020-10-14 18:23:47,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:23:47,479 INFO L93 Difference]: Finished difference Result 650 states and 790 transitions. [2020-10-14 18:23:47,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-14 18:23:47,479 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 358 [2020-10-14 18:23:47,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:23:47,482 INFO L225 Difference]: With dead ends: 650 [2020-10-14 18:23:47,482 INFO L226 Difference]: Without dead ends: 510 [2020-10-14 18:23:47,483 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-14 18:23:47,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2020-10-14 18:23:47,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 502. [2020-10-14 18:23:47,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 502 states. [2020-10-14 18:23:47,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 636 transitions. [2020-10-14 18:23:47,493 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 636 transitions. Word has length 358 [2020-10-14 18:23:47,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:23:47,493 INFO L479 AbstractCegarLoop]: Abstraction has 502 states and 636 transitions. [2020-10-14 18:23:47,493 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-14 18:23:47,493 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 636 transitions. [2020-10-14 18:23:47,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 367 [2020-10-14 18:23:47,496 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:23:47,496 INFO L422 BasicCegarLoop]: trace histogram [45, 44, 44, 44, 44, 44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:23:47,496 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-14 18:23:47,497 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:23:47,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:23:47,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1485053293, now seen corresponding path program 42 times [2020-10-14 18:23:47,498 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:23:47,498 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1421490542] [2020-10-14 18:23:47,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:23:47,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:23:47,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:23:48,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:23:52,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:23:52,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 374 [2020-10-14 18:23:52,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:23:52,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-14 18:23:52,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:23:52,565 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:23:52,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-14 18:23:52,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:23:52,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 222 [2020-10-14 18:23:52,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:23:53,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:23:53,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:23:53,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:23:53,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:23:53,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:23:53,798 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:23:53,798 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:23:53,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:23:53,799 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:23:53,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:23:53,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:23:53,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:23:53,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:23:53,862 INFO L134 CoverageAnalysis]: Checked inductivity of 7700 backedges. 0 proven. 4774 refuted. 0 times theorem prover too weak. 2926 trivial. 0 not checked. [2020-10-14 18:23:53,862 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1421490542] [2020-10-14 18:23:53,863 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:23:53,863 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-14 18:23:53,865 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019790726] [2020-10-14 18:23:53,866 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-14 18:23:53,866 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:23:53,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-14 18:23:53,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-10-14 18:23:53,867 INFO L87 Difference]: Start difference. First operand 502 states and 636 transitions. Second operand 48 states. [2020-10-14 18:23:55,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:23:55,047 INFO L93 Difference]: Finished difference Result 664 states and 807 transitions. [2020-10-14 18:23:55,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-14 18:23:55,047 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 366 [2020-10-14 18:23:55,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:23:55,050 INFO L225 Difference]: With dead ends: 664 [2020-10-14 18:23:55,050 INFO L226 Difference]: Without dead ends: 521 [2020-10-14 18:23:55,051 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-10-14 18:23:55,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2020-10-14 18:23:55,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 513. [2020-10-14 18:23:55,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 513 states. [2020-10-14 18:23:55,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 650 transitions. [2020-10-14 18:23:55,058 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 650 transitions. Word has length 366 [2020-10-14 18:23:55,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:23:55,059 INFO L479 AbstractCegarLoop]: Abstraction has 513 states and 650 transitions. [2020-10-14 18:23:55,059 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-14 18:23:55,059 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 650 transitions. [2020-10-14 18:23:55,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2020-10-14 18:23:55,061 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:23:55,061 INFO L422 BasicCegarLoop]: trace histogram [46, 45, 45, 45, 45, 45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:23:55,061 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-14 18:23:55,061 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:23:55,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:23:55,061 INFO L82 PathProgramCache]: Analyzing trace with hash -475812457, now seen corresponding path program 43 times [2020-10-14 18:23:55,061 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:23:55,062 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [931553769] [2020-10-14 18:23:55,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:23:55,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:23:55,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:23:56,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:24:00,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:24:00,124 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 382 [2020-10-14 18:24:00,124 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:24:00,124 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-14 18:24:00,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:24:00,125 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:24:00,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-14 18:24:00,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:24:00,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 227 [2020-10-14 18:24:00,125 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:24:01,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:24:01,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:24:01,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:24:01,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:24:01,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:24:01,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:24:01,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:24:01,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:24:01,419 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:24:01,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:24:01,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:24:01,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:24:01,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:24:01,483 INFO L134 CoverageAnalysis]: Checked inductivity of 8055 backedges. 0 proven. 4995 refuted. 0 times theorem prover too weak. 3060 trivial. 0 not checked. [2020-10-14 18:24:01,484 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [931553769] [2020-10-14 18:24:01,484 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:24:01,484 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-14 18:24:01,484 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096609898] [2020-10-14 18:24:01,485 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-14 18:24:01,485 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:24:01,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-14 18:24:01,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-10-14 18:24:01,485 INFO L87 Difference]: Start difference. First operand 513 states and 650 transitions. Second operand 49 states. [2020-10-14 18:24:02,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:24:02,829 INFO L93 Difference]: Finished difference Result 678 states and 824 transitions. [2020-10-14 18:24:02,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-14 18:24:02,830 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 374 [2020-10-14 18:24:02,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:24:02,834 INFO L225 Difference]: With dead ends: 678 [2020-10-14 18:24:02,834 INFO L226 Difference]: Without dead ends: 532 [2020-10-14 18:24:02,836 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-10-14 18:24:02,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2020-10-14 18:24:02,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 524. [2020-10-14 18:24:02,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 524 states. [2020-10-14 18:24:02,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 664 transitions. [2020-10-14 18:24:02,845 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 664 transitions. Word has length 374 [2020-10-14 18:24:02,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:24:02,845 INFO L479 AbstractCegarLoop]: Abstraction has 524 states and 664 transitions. [2020-10-14 18:24:02,845 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-14 18:24:02,845 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 664 transitions. [2020-10-14 18:24:02,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 383 [2020-10-14 18:24:02,848 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:24:02,848 INFO L422 BasicCegarLoop]: trace histogram [47, 46, 46, 46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:24:02,848 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-14 18:24:02,848 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:24:02,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:24:02,849 INFO L82 PathProgramCache]: Analyzing trace with hash -609149907, now seen corresponding path program 44 times [2020-10-14 18:24:02,849 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:24:02,849 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [371671161] [2020-10-14 18:24:02,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:24:02,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:24:02,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:24:04,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:24:07,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:24:07,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 390 [2020-10-14 18:24:07,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 18:24:07,887 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-14 18:24:07,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:24:07,888 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:24:07,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-14 18:24:07,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 18:24:07,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 232 [2020-10-14 18:24:07,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:24:09,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 18:24:09,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:24:09,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:24:09,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 18:24:09,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 18:24:09,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 18:24:09,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 18:24:09,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 18:24:09,214 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 18:24:09,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 18:24:09,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 18:24:09,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 18:24:09,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 18:24:09,285 INFO L134 CoverageAnalysis]: Checked inductivity of 8418 backedges. 0 proven. 5221 refuted. 0 times theorem prover too weak. 3197 trivial. 0 not checked. [2020-10-14 18:24:09,285 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [371671161] [2020-10-14 18:24:09,285 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 18:24:09,285 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-14 18:24:09,286 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973555152] [2020-10-14 18:24:09,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-14 18:24:09,286 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 18:24:09,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-14 18:24:09,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-10-14 18:24:09,287 INFO L87 Difference]: Start difference. First operand 524 states and 664 transitions. Second operand 50 states. [2020-10-14 18:24:10,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 18:24:10,410 INFO L93 Difference]: Finished difference Result 692 states and 841 transitions. [2020-10-14 18:24:10,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-14 18:24:10,411 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 382 [2020-10-14 18:24:10,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 18:24:10,414 INFO L225 Difference]: With dead ends: 692 [2020-10-14 18:24:10,414 INFO L226 Difference]: Without dead ends: 543 [2020-10-14 18:24:10,415 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-10-14 18:24:10,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2020-10-14 18:24:10,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 535. [2020-10-14 18:24:10,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 535 states. [2020-10-14 18:24:10,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 678 transitions. [2020-10-14 18:24:10,423 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 678 transitions. Word has length 382 [2020-10-14 18:24:10,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 18:24:10,423 INFO L479 AbstractCegarLoop]: Abstraction has 535 states and 678 transitions. [2020-10-14 18:24:10,423 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-14 18:24:10,423 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 678 transitions. [2020-10-14 18:24:10,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2020-10-14 18:24:10,426 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 18:24:10,426 INFO L422 BasicCegarLoop]: trace histogram [48, 47, 47, 47, 47, 47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 18:24:10,426 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-14 18:24:10,426 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 18:24:10,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 18:24:10,427 INFO L82 PathProgramCache]: Analyzing trace with hash 368444631, now seen corresponding path program 45 times [2020-10-14 18:24:10,427 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 18:24:10,427 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1751590432] [2020-10-14 18:24:10,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 18:24:10,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 18:24:10,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 18:24:11,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking...