/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/standard_copy7_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 23:30:40,086 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 23:30:40,092 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 23:30:40,116 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 23:30:40,116 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 23:30:40,117 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 23:30:40,119 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 23:30:40,121 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 23:30:40,122 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 23:30:40,123 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 23:30:40,125 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 23:30:40,126 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 23:30:40,126 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 23:30:40,127 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 23:30:40,128 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 23:30:40,129 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 23:30:40,130 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 23:30:40,131 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 23:30:40,132 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 23:30:40,134 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 23:30:40,136 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 23:30:40,137 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 23:30:40,138 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 23:30:40,139 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 23:30:40,142 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 23:30:40,142 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 23:30:40,142 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 23:30:40,143 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 23:30:40,144 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 23:30:40,145 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 23:30:40,145 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 23:30:40,146 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 23:30:40,146 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 23:30:40,147 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 23:30:40,148 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 23:30:40,149 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 23:30:40,150 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 23:30:40,150 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 23:30:40,150 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 23:30:40,151 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 23:30:40,152 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 23:30:40,153 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 [2020-10-13 23:30:40,176 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 23:30:40,176 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 23:30:40,178 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 23:30:40,178 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 23:30:40,178 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 23:30:40,178 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 23:30:40,179 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 23:30:40,179 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 23:30:40,179 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 23:30:40,179 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 23:30:40,179 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 23:30:40,179 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 23:30:40,180 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 23:30:40,180 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 23:30:40,180 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 23:30:40,180 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 23:30:40,180 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 23:30:40,181 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 23:30:40,181 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 23:30:40,181 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 23:30:40,181 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 23:30:40,181 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 23:30:40,182 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 23:30:40,182 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 23:30:40,182 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 23:30:40,182 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 23:30:40,182 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 23:30:40,182 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 23:30:40,183 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 23:30:40,183 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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-13 23:30:40,509 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 23:30:40,522 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 23:30:40,526 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 23:30:40,528 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 23:30:40,528 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 23:30:40,529 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy7_ground-2.i [2020-10-13 23:30:40,610 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3f01f86e0/9d64b5d8d3984241ada3509161662c5c/FLAG7236b3ffb [2020-10-13 23:30:41,084 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 23:30:41,084 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_copy7_ground-2.i [2020-10-13 23:30:41,091 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3f01f86e0/9d64b5d8d3984241ada3509161662c5c/FLAG7236b3ffb [2020-10-13 23:30:41,464 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3f01f86e0/9d64b5d8d3984241ada3509161662c5c [2020-10-13 23:30:41,476 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 23:30:41,480 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 23:30:41,482 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 23:30:41,482 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 23:30:41,486 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 23:30:41,487 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:30:41" (1/1) ... [2020-10-13 23:30:41,490 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@406521a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:30:41, skipping insertion in model container [2020-10-13 23:30:41,490 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:30:41" (1/1) ... [2020-10-13 23:30:41,499 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 23:30:41,522 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 23:30:41,760 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 23:30:41,764 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 23:30:41,791 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 23:30:41,809 INFO L208 MainTranslator]: Completed translation [2020-10-13 23:30:41,810 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:30:41 WrapperNode [2020-10-13 23:30:41,810 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 23:30:41,811 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 23:30:41,811 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 23:30:41,811 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 23:30:41,908 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:30:41" (1/1) ... [2020-10-13 23:30:41,909 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:30:41" (1/1) ... [2020-10-13 23:30:41,917 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:30:41" (1/1) ... [2020-10-13 23:30:41,917 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:30:41" (1/1) ... [2020-10-13 23:30:41,929 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:30:41" (1/1) ... [2020-10-13 23:30:41,936 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:30:41" (1/1) ... [2020-10-13 23:30:41,939 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:30:41" (1/1) ... [2020-10-13 23:30:41,942 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 23:30:41,943 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 23:30:41,943 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 23:30:41,943 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 23:30:41,944 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:30:41" (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 [2020-10-13 23:30:42,000 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 23:30:42,000 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 23:30:42,000 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 23:30:42,000 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 23:30:42,000 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 23:30:42,001 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 23:30:42,001 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 23:30:42,001 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 23:30:42,001 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 23:30:42,001 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 23:30:42,001 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 23:30:42,002 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 23:30:42,002 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 23:30:42,002 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 23:30:42,338 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 23:30:42,338 INFO L295 CfgBuilder]: Removed 9 assume(true) statements. [2020-10-13 23:30:42,343 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:30:42 BoogieIcfgContainer [2020-10-13 23:30:42,343 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 23:30:42,344 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 23:30:42,345 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 23:30:42,351 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 23:30:42,351 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 11:30:41" (1/3) ... [2020-10-13 23:30:42,353 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c2702f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:30:42, skipping insertion in model container [2020-10-13 23:30:42,353 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:30:41" (2/3) ... [2020-10-13 23:30:42,354 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c2702f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:30:42, skipping insertion in model container [2020-10-13 23:30:42,354 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:30:42" (3/3) ... [2020-10-13 23:30:42,357 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copy7_ground-2.i [2020-10-13 23:30:42,374 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 23:30:42,384 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 23:30:42,401 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 23:30:42,431 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 23:30:42,431 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 23:30:42,432 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 23:30:42,432 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 23:30:42,432 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 23:30:42,432 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 23:30:42,433 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 23:30:42,433 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 23:30:42,455 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states. [2020-10-13 23:30:42,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-13 23:30:42,463 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:30:42,464 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:30:42,465 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:30:42,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:30:42,472 INFO L82 PathProgramCache]: Analyzing trace with hash -2029657296, now seen corresponding path program 1 times [2020-10-13 23:30:42,482 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:30:42,482 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [979809248] [2020-10-13 23:30:42,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:30:42,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:42,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:42,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:42,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:42,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:42,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:42,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:43,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:43,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:44,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:44,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-13 23:30:44,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 23:30:44,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1951 [2020-10-13 23:30:44,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:44,669 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:44,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:30:44,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:30:44,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:30:44,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-13 23:30:44,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:30:44,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:44,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:44,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:44,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:30:44,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:30:44,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 23:30:44,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:44,742 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:44,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:30:44,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:30:44,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:30:44,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 23:30:44,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:30:44,757 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [979809248] [2020-10-13 23:30:44,760 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:30:44,761 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 23:30:44,762 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079582084] [2020-10-13 23:30:44,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 23:30:44,769 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:30:44,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 23:30:44,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 23:30:44,794 INFO L87 Difference]: Start difference. First operand 45 states. Second operand 3 states. [2020-10-13 23:30:45,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:30:45,026 INFO L93 Difference]: Finished difference Result 82 states and 117 transitions. [2020-10-13 23:30:45,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 23:30:45,032 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-10-13 23:30:45,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:30:45,049 INFO L225 Difference]: With dead ends: 82 [2020-10-13 23:30:45,049 INFO L226 Difference]: Without dead ends: 40 [2020-10-13 23:30:45,054 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 23:30:45,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-13 23:30:45,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-10-13 23:30:45,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-13 23:30:45,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2020-10-13 23:30:45,112 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 27 [2020-10-13 23:30:45,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:30:45,113 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2020-10-13 23:30:45,113 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 23:30:45,114 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2020-10-13 23:30:45,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-13 23:30:45,116 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:30:45,117 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:30:45,117 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 23:30:45,117 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:30:45,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:30:45,118 INFO L82 PathProgramCache]: Analyzing trace with hash -2073025378, now seen corresponding path program 1 times [2020-10-13 23:30:45,118 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:30:45,119 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [679562539] [2020-10-13 23:30:45,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:30:45,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:45,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:45,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:45,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:45,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:45,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:45,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:45,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:45,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:50,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:50,104 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-13 23:30:50,104 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 23:30:50,104 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4961 [2020-10-13 23:30:50,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:50,105 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:50,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:30:50,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-13 23:30:50,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 23:30:50,106 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:30:50,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:30:50,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:50,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:50,148 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:50,148 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:30:50,148 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:30:50,149 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:30:50,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:50,156 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:50,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:30:50,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:30:50,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:30:50,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:30:50,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:30:50,163 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [679562539] [2020-10-13 23:30:50,163 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:30:50,164 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 23:30:50,164 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011900102] [2020-10-13 23:30:50,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 23:30:50,167 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:30:50,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 23:30:50,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 23:30:50,169 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand 4 states. [2020-10-13 23:30:50,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:30:50,363 INFO L93 Difference]: Finished difference Result 83 states and 104 transitions. [2020-10-13 23:30:50,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 23:30:50,363 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-10-13 23:30:50,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:30:50,365 INFO L225 Difference]: With dead ends: 83 [2020-10-13 23:30:50,365 INFO L226 Difference]: Without dead ends: 54 [2020-10-13 23:30:50,367 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 [2020-10-13 23:30:50,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-13 23:30:50,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 47. [2020-10-13 23:30:50,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-13 23:30:50,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2020-10-13 23:30:50,377 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 27 [2020-10-13 23:30:50,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:30:50,377 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2020-10-13 23:30:50,377 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 23:30:50,377 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2020-10-13 23:30:50,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-13 23:30:50,379 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:30:50,379 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:30:50,379 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 23:30:50,379 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:30:50,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:30:50,380 INFO L82 PathProgramCache]: Analyzing trace with hash -864373520, now seen corresponding path program 1 times [2020-10-13 23:30:50,380 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:30:50,381 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1505378904] [2020-10-13 23:30:50,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:30:50,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:50,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:50,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:50,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:50,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:50,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:50,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:50,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:52,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:55,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:55,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-13 23:30:55,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 23:30:55,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-13 23:30:55,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:55,409 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:55,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:30:55,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:30:55,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 23:30:55,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:30:55,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:30:55,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:55,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:55,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:30:55,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:30:55,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:30:55,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 23:30:55,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:30:55,465 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:30:55,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:30:55,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:30:55,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:30:55,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:30:55,472 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-13 23:30:55,473 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1505378904] [2020-10-13 23:30:55,473 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:30:55,473 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 23:30:55,473 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476022982] [2020-10-13 23:30:55,475 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 23:30:55,475 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:30:55,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 23:30:55,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 23:30:55,476 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand 4 states. [2020-10-13 23:30:55,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:30:55,627 INFO L93 Difference]: Finished difference Result 88 states and 104 transitions. [2020-10-13 23:30:55,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 23:30:55,627 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 41 [2020-10-13 23:30:55,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:30:55,628 INFO L225 Difference]: With dead ends: 88 [2020-10-13 23:30:55,628 INFO L226 Difference]: Without dead ends: 49 [2020-10-13 23:30:55,630 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 [2020-10-13 23:30:55,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-13 23:30:55,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2020-10-13 23:30:55,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-13 23:30:55,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2020-10-13 23:30:55,644 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 41 [2020-10-13 23:30:55,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:30:55,644 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2020-10-13 23:30:55,644 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 23:30:55,644 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2020-10-13 23:30:55,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-13 23:30:55,648 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:30:55,648 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:30:55,648 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 23:30:55,648 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:30:55,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:30:55,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1132383374, now seen corresponding path program 1 times [2020-10-13 23:30:55,649 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:30:55,649 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1687981854] [2020-10-13 23:30:55,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:30:55,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:30:55,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:55,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:55,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:55,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:55,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:55,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:30:56,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:00,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:00,679 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-13 23:31:00,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 23:31:00,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 23:31:00,680 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:00,680 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:00,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 23:31:00,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-13 23:31:00,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 23:31:00,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 23:31:00,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:31:00,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:00,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:00,722 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:00,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:31:00,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:31:00,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:31:00,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:00,724 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:00,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:31:00,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:31:00,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:31:00,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:31:00,729 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-13 23:31:00,730 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1687981854] [2020-10-13 23:31:00,730 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:31:00,731 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 23:31:00,731 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229572719] [2020-10-13 23:31:00,731 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 23:31:00,732 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:31:00,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 23:31:00,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 23:31:00,733 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand 5 states. [2020-10-13 23:31:00,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:31:00,962 INFO L93 Difference]: Finished difference Result 104 states and 125 transitions. [2020-10-13 23:31:00,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 23:31:00,963 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 43 [2020-10-13 23:31:00,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:31:00,964 INFO L225 Difference]: With dead ends: 104 [2020-10-13 23:31:00,964 INFO L226 Difference]: Without dead ends: 69 [2020-10-13 23:31:00,966 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 [2020-10-13 23:31:00,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-13 23:31:00,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 62. [2020-10-13 23:31:00,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-13 23:31:00,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 70 transitions. [2020-10-13 23:31:00,982 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 70 transitions. Word has length 43 [2020-10-13 23:31:00,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:31:00,982 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 70 transitions. [2020-10-13 23:31:00,983 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 23:31:00,983 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 70 transitions. [2020-10-13 23:31:00,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-13 23:31:00,984 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:31:00,985 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:31:00,986 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 23:31:00,986 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:31:00,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:31:00,986 INFO L82 PathProgramCache]: Analyzing trace with hash 1502689504, now seen corresponding path program 2 times [2020-10-13 23:31:00,987 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:31:00,987 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1654968438] [2020-10-13 23:31:00,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:31:01,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:01,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:01,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:01,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:01,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:01,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:01,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:06,015 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:06,015 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-13 23:31:06,015 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:31:06,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 23:31:06,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:06,016 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:06,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 23:31:06,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-13 23:31:06,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:31:06,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:31:06,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:31:06,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:06,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:06,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:06,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:31:06,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:31:06,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:31:06,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:06,065 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:06,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:31:06,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:31:06,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:31:06,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:31:06,070 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-13 23:31:06,070 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1654968438] [2020-10-13 23:31:06,071 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:31:06,071 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 23:31:06,071 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713324022] [2020-10-13 23:31:06,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 23:31:06,072 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:31:06,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 23:31:06,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 23:31:06,073 INFO L87 Difference]: Start difference. First operand 62 states and 70 transitions. Second operand 6 states. [2020-10-13 23:31:06,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:31:06,293 INFO L93 Difference]: Finished difference Result 130 states and 151 transitions. [2020-10-13 23:31:06,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 23:31:06,293 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 57 [2020-10-13 23:31:06,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:31:06,295 INFO L225 Difference]: With dead ends: 130 [2020-10-13 23:31:06,295 INFO L226 Difference]: Without dead ends: 83 [2020-10-13 23:31:06,296 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 [2020-10-13 23:31:06,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-13 23:31:06,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 76. [2020-10-13 23:31:06,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-13 23:31:06,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 84 transitions. [2020-10-13 23:31:06,305 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 84 transitions. Word has length 57 [2020-10-13 23:31:06,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:31:06,305 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 84 transitions. [2020-10-13 23:31:06,305 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 23:31:06,306 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 84 transitions. [2020-10-13 23:31:06,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-13 23:31:06,307 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:31:06,307 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:31:06,308 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 23:31:06,308 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:31:06,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:31:06,308 INFO L82 PathProgramCache]: Analyzing trace with hash 2060660146, now seen corresponding path program 3 times [2020-10-13 23:31:06,308 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:31:06,309 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [294784080] [2020-10-13 23:31:06,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:31:06,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:06,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:06,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:06,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:06,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:06,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:07,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:11,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:11,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-13 23:31:11,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:31:11,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-13 23:31:11,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:11,335 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:11,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 23:31:11,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:31:11,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 23:31:11,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:31:11,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:31:11,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:11,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:11,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:11,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:31:11,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:31:11,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:31:11,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:11,388 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:11,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:31:11,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:31:11,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:31:11,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:31:11,400 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2020-10-13 23:31:11,401 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [294784080] [2020-10-13 23:31:11,401 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:31:11,402 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 23:31:11,402 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762174816] [2020-10-13 23:31:11,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 23:31:11,404 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:31:11,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 23:31:11,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 23:31:11,405 INFO L87 Difference]: Start difference. First operand 76 states and 84 transitions. Second operand 5 states. [2020-10-13 23:31:11,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:31:11,533 INFO L93 Difference]: Finished difference Result 146 states and 162 transitions. [2020-10-13 23:31:11,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 23:31:11,534 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 71 [2020-10-13 23:31:11,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:31:11,535 INFO L225 Difference]: With dead ends: 146 [2020-10-13 23:31:11,536 INFO L226 Difference]: Without dead ends: 79 [2020-10-13 23:31:11,537 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 [2020-10-13 23:31:11,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-13 23:31:11,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2020-10-13 23:31:11,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-13 23:31:11,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 86 transitions. [2020-10-13 23:31:11,561 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 86 transitions. Word has length 71 [2020-10-13 23:31:11,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:31:11,562 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 86 transitions. [2020-10-13 23:31:11,562 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 23:31:11,564 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 86 transitions. [2020-10-13 23:31:11,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-13 23:31:11,565 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:31:11,566 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:31:11,566 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 23:31:11,566 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:31:11,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:31:11,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1535075120, now seen corresponding path program 4 times [2020-10-13 23:31:11,569 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:31:11,570 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [730151247] [2020-10-13 23:31:11,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:31:11,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:11,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:11,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:11,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:11,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:11,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:12,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:16,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:16,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-13 23:31:16,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:31:16,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-13 23:31:16,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:16,611 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:16,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 23:31:16,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-13 23:31:16,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 23:31:16,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:31:16,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:31:16,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:16,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:16,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:16,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:31:16,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:31:16,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:31:16,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:16,669 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:16,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:31:16,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:31:16,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:31:16,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:31:16,675 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2020-10-13 23:31:16,676 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [730151247] [2020-10-13 23:31:16,676 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:31:16,676 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 23:31:16,677 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121879542] [2020-10-13 23:31:16,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 23:31:16,677 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:31:16,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 23:31:16,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 23:31:16,678 INFO L87 Difference]: Start difference. First operand 78 states and 86 transitions. Second operand 7 states. [2020-10-13 23:31:16,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:31:16,925 INFO L93 Difference]: Finished difference Result 158 states and 179 transitions. [2020-10-13 23:31:16,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 23:31:16,926 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 73 [2020-10-13 23:31:16,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:31:16,927 INFO L225 Difference]: With dead ends: 158 [2020-10-13 23:31:16,927 INFO L226 Difference]: Without dead ends: 99 [2020-10-13 23:31:16,928 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 [2020-10-13 23:31:16,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-13 23:31:16,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 92. [2020-10-13 23:31:16,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-13 23:31:16,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 100 transitions. [2020-10-13 23:31:16,936 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 100 transitions. Word has length 73 [2020-10-13 23:31:16,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:31:16,936 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 100 transitions. [2020-10-13 23:31:16,936 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 23:31:16,937 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 100 transitions. [2020-10-13 23:31:16,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-13 23:31:16,938 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:31:16,938 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:31:16,938 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 23:31:16,938 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:31:16,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:31:16,939 INFO L82 PathProgramCache]: Analyzing trace with hash -1208914526, now seen corresponding path program 5 times [2020-10-13 23:31:16,939 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:31:16,939 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1990392512] [2020-10-13 23:31:16,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:31:16,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:16,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:16,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:17,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:17,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:17,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:17,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:21,962 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:21,962 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-13 23:31:21,962 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:31:21,962 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 23:31:21,963 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:21,963 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:21,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 23:31:21,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:31:21,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 23:31:21,964 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:31:22,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:31:22,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:22,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:22,017 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:22,018 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:31:22,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:31:22,018 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:31:22,018 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:22,019 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:22,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:31:22,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:31:22,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:31:22,020 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:31:22,026 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2020-10-13 23:31:22,027 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1990392512] [2020-10-13 23:31:22,027 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:31:22,027 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 23:31:22,027 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452702573] [2020-10-13 23:31:22,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 23:31:22,028 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:31:22,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 23:31:22,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 23:31:22,029 INFO L87 Difference]: Start difference. First operand 92 states and 100 transitions. Second operand 6 states. [2020-10-13 23:31:22,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:31:22,124 INFO L93 Difference]: Finished difference Result 176 states and 192 transitions. [2020-10-13 23:31:22,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 23:31:22,125 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 87 [2020-10-13 23:31:22,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:31:22,126 INFO L225 Difference]: With dead ends: 176 [2020-10-13 23:31:22,126 INFO L226 Difference]: Without dead ends: 95 [2020-10-13 23:31:22,127 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 [2020-10-13 23:31:22,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-13 23:31:22,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2020-10-13 23:31:22,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-13 23:31:22,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 102 transitions. [2020-10-13 23:31:22,134 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 102 transitions. Word has length 87 [2020-10-13 23:31:22,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:31:22,135 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 102 transitions. [2020-10-13 23:31:22,135 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 23:31:22,135 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 102 transitions. [2020-10-13 23:31:22,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-13 23:31:22,136 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:31:22,136 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:31:22,137 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 23:31:22,137 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:31:22,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:31:22,137 INFO L82 PathProgramCache]: Analyzing trace with hash 46719168, now seen corresponding path program 6 times [2020-10-13 23:31:22,137 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:31:22,138 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1193284848] [2020-10-13 23:31:22,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:31:22,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:22,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:22,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:22,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:22,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:22,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:22,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:27,156 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:27,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-13 23:31:27,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:31:27,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 23:31:27,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:27,157 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:27,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 23:31:27,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-13 23:31:27,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 23:31:27,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:31:27,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:31:27,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:27,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:27,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:27,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:31:27,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:31:27,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:31:27,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:27,228 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:27,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:31:27,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:31:27,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:31:27,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:31:27,240 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2020-10-13 23:31:27,246 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1193284848] [2020-10-13 23:31:27,248 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:31:27,248 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 23:31:27,248 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214863887] [2020-10-13 23:31:27,249 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 23:31:27,249 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:31:27,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 23:31:27,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 23:31:27,251 INFO L87 Difference]: Start difference. First operand 94 states and 102 transitions. Second operand 8 states. [2020-10-13 23:31:27,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:31:27,530 INFO L93 Difference]: Finished difference Result 186 states and 207 transitions. [2020-10-13 23:31:27,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 23:31:27,530 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 89 [2020-10-13 23:31:27,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:31:27,531 INFO L225 Difference]: With dead ends: 186 [2020-10-13 23:31:27,532 INFO L226 Difference]: Without dead ends: 115 [2020-10-13 23:31:27,535 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 [2020-10-13 23:31:27,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-13 23:31:27,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 108. [2020-10-13 23:31:27,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-13 23:31:27,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 116 transitions. [2020-10-13 23:31:27,553 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 116 transitions. Word has length 89 [2020-10-13 23:31:27,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:31:27,553 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 116 transitions. [2020-10-13 23:31:27,553 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 23:31:27,553 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 116 transitions. [2020-10-13 23:31:27,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-13 23:31:27,555 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:31:27,555 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:31:27,558 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 23:31:27,558 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:31:27,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:31:27,559 INFO L82 PathProgramCache]: Analyzing trace with hash 1315999122, now seen corresponding path program 7 times [2020-10-13 23:31:27,559 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:31:27,559 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [502352153] [2020-10-13 23:31:27,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:31:27,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:27,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:27,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:27,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:27,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:27,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:30,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:32,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:32,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-13 23:31:32,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:31:32,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-13 23:31:32,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:32,602 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:32,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 23:31:32,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-13 23:31:32,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 23:31:32,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:31:32,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:31:32,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:32,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:32,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:32,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:31:32,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:31:32,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:31:32,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:32,678 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:32,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:31:32,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:31:32,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:31:32,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:31:32,688 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2020-10-13 23:31:32,689 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [502352153] [2020-10-13 23:31:32,689 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:31:32,689 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 23:31:32,689 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404114850] [2020-10-13 23:31:32,690 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 23:31:32,691 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:31:32,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 23:31:32,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 23:31:32,691 INFO L87 Difference]: Start difference. First operand 108 states and 116 transitions. Second operand 9 states. [2020-10-13 23:31:32,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:31:32,975 INFO L93 Difference]: Finished difference Result 212 states and 233 transitions. [2020-10-13 23:31:32,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 23:31:32,976 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 103 [2020-10-13 23:31:32,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:31:32,977 INFO L225 Difference]: With dead ends: 212 [2020-10-13 23:31:32,977 INFO L226 Difference]: Without dead ends: 129 [2020-10-13 23:31:32,977 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 [2020-10-13 23:31:32,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-13 23:31:32,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 122. [2020-10-13 23:31:32,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-13 23:31:32,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 130 transitions. [2020-10-13 23:31:32,984 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 130 transitions. Word has length 103 [2020-10-13 23:31:32,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:31:32,984 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 130 transitions. [2020-10-13 23:31:32,985 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 23:31:32,985 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 130 transitions. [2020-10-13 23:31:32,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-13 23:31:32,986 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:31:32,986 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:31:32,986 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 23:31:32,986 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:31:32,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:31:32,987 INFO L82 PathProgramCache]: Analyzing trace with hash -1912806684, now seen corresponding path program 8 times [2020-10-13 23:31:32,987 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:31:32,987 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1286087092] [2020-10-13 23:31:32,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:31:32,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:33,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:33,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:33,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:33,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:33,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:36,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:38,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:38,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-13 23:31:38,028 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:31:38,028 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-10-13 23:31:38,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:38,029 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:38,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 23:31:38,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:31:38,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 23:31:38,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:31:38,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:31:38,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:38,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:38,083 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:38,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:31:38,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:31:38,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:31:38,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:38,084 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:38,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:31:38,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:31:38,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:31:38,085 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:31:38,108 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2020-10-13 23:31:38,108 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1286087092] [2020-10-13 23:31:38,108 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:31:38,109 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 23:31:38,109 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532320946] [2020-10-13 23:31:38,109 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 23:31:38,110 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:31:38,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 23:31:38,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 23:31:38,110 INFO L87 Difference]: Start difference. First operand 122 states and 130 transitions. Second operand 7 states. [2020-10-13 23:31:38,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:31:38,247 INFO L93 Difference]: Finished difference Result 234 states and 250 transitions. [2020-10-13 23:31:38,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 23:31:38,247 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 117 [2020-10-13 23:31:38,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:31:38,248 INFO L225 Difference]: With dead ends: 234 [2020-10-13 23:31:38,248 INFO L226 Difference]: Without dead ends: 125 [2020-10-13 23:31:38,249 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 [2020-10-13 23:31:38,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-13 23:31:38,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 124. [2020-10-13 23:31:38,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-13 23:31:38,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 132 transitions. [2020-10-13 23:31:38,262 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 132 transitions. Word has length 117 [2020-10-13 23:31:38,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:31:38,263 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 132 transitions. [2020-10-13 23:31:38,263 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 23:31:38,263 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 132 transitions. [2020-10-13 23:31:38,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-10-13 23:31:38,267 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:31:38,267 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:31:38,268 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 23:31:38,268 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:31:38,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:31:38,268 INFO L82 PathProgramCache]: Analyzing trace with hash -1949266558, now seen corresponding path program 9 times [2020-10-13 23:31:38,269 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:31:38,269 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1070417427] [2020-10-13 23:31:38,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:31:38,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:38,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:38,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:38,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:38,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:38,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:41,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:43,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:43,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-13 23:31:43,303 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:31:43,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-13 23:31:43,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:43,304 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:43,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 23:31:43,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 63 [2020-10-13 23:31:43,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 23:31:43,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:31:43,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:31:43,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:43,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:43,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:43,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:31:43,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:31:43,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:31:43,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:43,391 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:43,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:31:43,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:31:43,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:31:43,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:31:43,403 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2020-10-13 23:31:43,403 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1070417427] [2020-10-13 23:31:43,404 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:31:43,404 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 23:31:43,404 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426725187] [2020-10-13 23:31:43,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 23:31:43,405 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:31:43,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 23:31:43,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:31:43,405 INFO L87 Difference]: Start difference. First operand 124 states and 132 transitions. Second operand 10 states. [2020-10-13 23:31:43,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:31:43,762 INFO L93 Difference]: Finished difference Result 240 states and 261 transitions. [2020-10-13 23:31:43,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 23:31:43,763 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 119 [2020-10-13 23:31:43,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:31:43,764 INFO L225 Difference]: With dead ends: 240 [2020-10-13 23:31:43,764 INFO L226 Difference]: Without dead ends: 145 [2020-10-13 23:31:43,765 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 [2020-10-13 23:31:43,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-13 23:31:43,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 138. [2020-10-13 23:31:43,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-13 23:31:43,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 146 transitions. [2020-10-13 23:31:43,771 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 146 transitions. Word has length 119 [2020-10-13 23:31:43,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:31:43,772 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 146 transitions. [2020-10-13 23:31:43,772 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 23:31:43,772 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 146 transitions. [2020-10-13 23:31:43,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-10-13 23:31:43,773 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:31:43,773 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:31:43,774 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 23:31:43,774 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:31:43,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:31:43,774 INFO L82 PathProgramCache]: Analyzing trace with hash 863682260, now seen corresponding path program 10 times [2020-10-13 23:31:43,774 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:31:43,775 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [23067277] [2020-10-13 23:31:43,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:31:43,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:43,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:43,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:43,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:43,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:43,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:47,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:48,850 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:48,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 141 [2020-10-13 23:31:48,851 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:31:48,851 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5063 [2020-10-13 23:31:48,851 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:48,851 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:48,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 23:31:48,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:31:48,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 23:31:48,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:31:48,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:31:48,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:48,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:48,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:48,909 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:31:48,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:31:48,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:31:48,910 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:48,910 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:48,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:31:48,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:31:48,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:31:48,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:31:48,921 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2020-10-13 23:31:48,921 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [23067277] [2020-10-13 23:31:48,922 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:31:48,922 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 23:31:48,922 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565334115] [2020-10-13 23:31:48,922 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 23:31:48,923 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:31:48,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 23:31:48,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 23:31:48,923 INFO L87 Difference]: Start difference. First operand 138 states and 146 transitions. Second operand 8 states. [2020-10-13 23:31:49,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:31:49,024 INFO L93 Difference]: Finished difference Result 264 states and 280 transitions. [2020-10-13 23:31:49,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 23:31:49,025 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 133 [2020-10-13 23:31:49,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:31:49,027 INFO L225 Difference]: With dead ends: 264 [2020-10-13 23:31:49,027 INFO L226 Difference]: Without dead ends: 141 [2020-10-13 23:31:49,028 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 [2020-10-13 23:31:49,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-13 23:31:49,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 140. [2020-10-13 23:31:49,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-13 23:31:49,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 148 transitions. [2020-10-13 23:31:49,036 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 148 transitions. Word has length 133 [2020-10-13 23:31:49,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:31:49,036 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 148 transitions. [2020-10-13 23:31:49,036 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 23:31:49,036 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 148 transitions. [2020-10-13 23:31:49,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-10-13 23:31:49,038 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:31:49,038 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:31:49,038 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 23:31:49,039 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:31:49,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:31:49,039 INFO L82 PathProgramCache]: Analyzing trace with hash -1047433870, now seen corresponding path program 11 times [2020-10-13 23:31:49,039 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:31:49,039 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1798352186] [2020-10-13 23:31:49,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:31:49,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:49,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:49,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:49,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:49,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:49,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:53,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:54,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:54,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 143 [2020-10-13 23:31:54,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:31:54,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-13 23:31:54,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:54,064 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:54,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 23:31:54,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 71 [2020-10-13 23:31:54,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 23:31:54,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:31:54,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:31:54,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:54,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:54,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:54,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:31:54,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:31:54,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:31:54,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:54,152 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:54,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:31:54,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:31:54,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:31:54,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:31:54,162 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 319 trivial. 0 not checked. [2020-10-13 23:31:54,163 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1798352186] [2020-10-13 23:31:54,163 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:31:54,163 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 23:31:54,163 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455854998] [2020-10-13 23:31:54,164 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 23:31:54,164 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:31:54,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 23:31:54,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 23:31:54,165 INFO L87 Difference]: Start difference. First operand 140 states and 148 transitions. Second operand 11 states. [2020-10-13 23:31:54,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:31:54,579 INFO L93 Difference]: Finished difference Result 268 states and 289 transitions. [2020-10-13 23:31:54,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 23:31:54,580 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 135 [2020-10-13 23:31:54,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:31:54,581 INFO L225 Difference]: With dead ends: 268 [2020-10-13 23:31:54,581 INFO L226 Difference]: Without dead ends: 161 [2020-10-13 23:31:54,582 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 [2020-10-13 23:31:54,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-13 23:31:54,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 154. [2020-10-13 23:31:54,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-13 23:31:54,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 162 transitions. [2020-10-13 23:31:54,592 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 162 transitions. Word has length 135 [2020-10-13 23:31:54,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:31:54,592 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 162 transitions. [2020-10-13 23:31:54,593 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 23:31:54,593 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 162 transitions. [2020-10-13 23:31:54,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-10-13 23:31:54,594 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:31:54,594 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:31:54,594 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 23:31:54,595 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:31:54,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:31:54,595 INFO L82 PathProgramCache]: Analyzing trace with hash 1700887236, now seen corresponding path program 12 times [2020-10-13 23:31:54,595 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:31:54,595 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [194947089] [2020-10-13 23:31:54,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:31:54,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:54,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:54,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:54,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:54,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:54,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:59,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:59,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 157 [2020-10-13 23:31:59,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:31:59,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-13 23:31:59,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:59,640 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:59,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 23:31:59,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:31:59,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 23:31:59,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:31:59,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:31:59,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:59,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:59,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:31:59,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:31:59,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:31:59,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:31:59,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:31:59,703 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:31:59,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:31:59,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:31:59,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:31:59,703 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:31:59,713 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 448 trivial. 0 not checked. [2020-10-13 23:31:59,714 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [194947089] [2020-10-13 23:31:59,714 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:31:59,714 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 23:31:59,714 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48817174] [2020-10-13 23:31:59,715 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 23:31:59,715 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:31:59,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 23:31:59,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 23:31:59,715 INFO L87 Difference]: Start difference. First operand 154 states and 162 transitions. Second operand 9 states. [2020-10-13 23:31:59,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:31:59,841 INFO L93 Difference]: Finished difference Result 294 states and 310 transitions. [2020-10-13 23:31:59,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 23:31:59,842 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 149 [2020-10-13 23:31:59,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:31:59,844 INFO L225 Difference]: With dead ends: 294 [2020-10-13 23:31:59,844 INFO L226 Difference]: Without dead ends: 157 [2020-10-13 23:31:59,846 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 [2020-10-13 23:31:59,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-10-13 23:31:59,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 156. [2020-10-13 23:31:59,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-13 23:31:59,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 164 transitions. [2020-10-13 23:31:59,853 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 164 transitions. Word has length 149 [2020-10-13 23:31:59,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:31:59,853 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 164 transitions. [2020-10-13 23:31:59,853 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 23:31:59,853 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 164 transitions. [2020-10-13 23:31:59,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-10-13 23:31:59,855 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:31:59,855 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:31:59,855 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 23:31:59,856 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:31:59,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:31:59,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1160981858, now seen corresponding path program 13 times [2020-10-13 23:31:59,856 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:31:59,857 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [454696268] [2020-10-13 23:31:59,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:31:59,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:31:59,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:59,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:59,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:59,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:31:59,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:04,906 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:04,906 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 159 [2020-10-13 23:32:04,907 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:32:04,907 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5037 [2020-10-13 23:32:04,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:04,907 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:04,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 23:32:04,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-10-13 23:32:04,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 23:32:04,907 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:05,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:32:05,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:05,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:05,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:05,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:32:05,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:32:05,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:32:05,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:05,013 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:05,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:32:05,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:32:05,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:32:05,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:05,027 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2020-10-13 23:32:05,028 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [454696268] [2020-10-13 23:32:05,028 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:32:05,028 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 23:32:05,028 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475589523] [2020-10-13 23:32:05,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 23:32:05,029 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:32:05,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 23:32:05,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:32:05,030 INFO L87 Difference]: Start difference. First operand 156 states and 164 transitions. Second operand 12 states. [2020-10-13 23:32:05,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:32:05,437 INFO L93 Difference]: Finished difference Result 296 states and 317 transitions. [2020-10-13 23:32:05,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 23:32:05,438 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 151 [2020-10-13 23:32:05,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:32:05,440 INFO L225 Difference]: With dead ends: 296 [2020-10-13 23:32:05,440 INFO L226 Difference]: Without dead ends: 177 [2020-10-13 23:32:05,441 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:32:05,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-13 23:32:05,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 170. [2020-10-13 23:32:05,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-10-13 23:32:05,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 178 transitions. [2020-10-13 23:32:05,449 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 178 transitions. Word has length 151 [2020-10-13 23:32:05,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:32:05,449 INFO L479 AbstractCegarLoop]: Abstraction has 170 states and 178 transitions. [2020-10-13 23:32:05,449 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 23:32:05,449 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 178 transitions. [2020-10-13 23:32:05,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-10-13 23:32:05,454 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:32:05,454 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:32:05,454 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 23:32:05,455 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:32:05,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:32:05,455 INFO L82 PathProgramCache]: Analyzing trace with hash 1831933620, now seen corresponding path program 14 times [2020-10-13 23:32:05,455 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:32:05,455 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [976728134] [2020-10-13 23:32:05,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:32:05,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:05,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:05,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:05,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:05,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:05,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:10,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:10,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 173 [2020-10-13 23:32:10,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:32:10,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5071 [2020-10-13 23:32:10,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:10,544 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:10,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 23:32:10,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 85 [2020-10-13 23:32:10,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 23:32:10,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:10,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:32:10,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:10,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:10,667 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:10,667 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:32:10,667 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:32:10,667 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:32:10,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:10,668 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:10,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:32:10,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:32:10,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:32:10,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:10,680 INFO L134 CoverageAnalysis]: Checked inductivity of 603 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 522 trivial. 0 not checked. [2020-10-13 23:32:10,680 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [976728134] [2020-10-13 23:32:10,681 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:32:10,681 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 23:32:10,681 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442875418] [2020-10-13 23:32:10,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 23:32:10,682 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:32:10,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 23:32:10,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 23:32:10,682 INFO L87 Difference]: Start difference. First operand 170 states and 178 transitions. Second operand 13 states. [2020-10-13 23:32:11,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:32:11,110 INFO L93 Difference]: Finished difference Result 322 states and 343 transitions. [2020-10-13 23:32:11,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 23:32:11,114 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 165 [2020-10-13 23:32:11,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:32:11,116 INFO L225 Difference]: With dead ends: 322 [2020-10-13 23:32:11,116 INFO L226 Difference]: Without dead ends: 191 [2020-10-13 23:32:11,117 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 23:32:11,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-10-13 23:32:11,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 184. [2020-10-13 23:32:11,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-10-13 23:32:11,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 192 transitions. [2020-10-13 23:32:11,126 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 192 transitions. Word has length 165 [2020-10-13 23:32:11,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:32:11,126 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 192 transitions. [2020-10-13 23:32:11,126 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 23:32:11,126 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 192 transitions. [2020-10-13 23:32:11,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2020-10-13 23:32:11,128 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:32:11,128 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:32:11,129 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 23:32:11,129 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:32:11,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:32:11,129 INFO L82 PathProgramCache]: Analyzing trace with hash -1183856506, now seen corresponding path program 15 times [2020-10-13 23:32:11,129 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:32:11,130 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [354974938] [2020-10-13 23:32:11,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:32:11,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:11,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:11,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:11,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:11,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:11,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:16,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:16,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 187 [2020-10-13 23:32:16,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:32:16,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5062 [2020-10-13 23:32:16,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:16,205 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:16,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 23:32:16,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:32:16,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 23:32:16,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:16,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:32:16,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:16,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:16,279 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:16,279 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:32:16,279 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:32:16,280 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:32:16,280 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:16,280 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:16,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:32:16,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:32:16,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:32:16,281 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:16,294 INFO L134 CoverageAnalysis]: Checked inductivity of 736 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 700 trivial. 0 not checked. [2020-10-13 23:32:16,295 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [354974938] [2020-10-13 23:32:16,295 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:32:16,295 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 23:32:16,295 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024219631] [2020-10-13 23:32:16,296 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 23:32:16,296 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:32:16,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 23:32:16,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:32:16,296 INFO L87 Difference]: Start difference. First operand 184 states and 192 transitions. Second operand 10 states. [2020-10-13 23:32:16,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:32:16,399 INFO L93 Difference]: Finished difference Result 352 states and 368 transitions. [2020-10-13 23:32:16,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 23:32:16,400 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 179 [2020-10-13 23:32:16,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:32:16,402 INFO L225 Difference]: With dead ends: 352 [2020-10-13 23:32:16,402 INFO L226 Difference]: Without dead ends: 187 [2020-10-13 23:32:16,403 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 [2020-10-13 23:32:16,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-10-13 23:32:16,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 186. [2020-10-13 23:32:16,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-10-13 23:32:16,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 194 transitions. [2020-10-13 23:32:16,410 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 194 transitions. Word has length 179 [2020-10-13 23:32:16,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:32:16,411 INFO L479 AbstractCegarLoop]: Abstraction has 186 states and 194 transitions. [2020-10-13 23:32:16,411 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 23:32:16,411 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 194 transitions. [2020-10-13 23:32:16,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-10-13 23:32:16,412 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:32:16,412 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:32:16,412 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 23:32:16,413 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:32:16,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:32:16,413 INFO L82 PathProgramCache]: Analyzing trace with hash -1737911644, now seen corresponding path program 16 times [2020-10-13 23:32:16,413 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:32:16,413 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1704110683] [2020-10-13 23:32:16,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:32:16,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:16,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:16,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:16,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:16,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:16,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:21,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:21,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 189 [2020-10-13 23:32:21,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:32:21,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5275 [2020-10-13 23:32:21,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:21,704 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:21,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 23:32:21,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-13 23:32:21,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 23:32:21,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:21,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:32:21,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:21,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:21,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:21,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:32:21,855 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:32:21,855 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:32:21,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:21,856 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:21,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:32:21,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:32:21,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:32:21,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:21,873 INFO L134 CoverageAnalysis]: Checked inductivity of 749 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 649 trivial. 0 not checked. [2020-10-13 23:32:21,873 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1704110683] [2020-10-13 23:32:21,873 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:32:21,874 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 23:32:21,874 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495596943] [2020-10-13 23:32:21,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 23:32:21,874 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:32:21,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 23:32:21,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:32:21,875 INFO L87 Difference]: Start difference. First operand 186 states and 194 transitions. Second operand 14 states. [2020-10-13 23:32:22,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:32:22,341 INFO L93 Difference]: Finished difference Result 350 states and 371 transitions. [2020-10-13 23:32:22,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 23:32:22,342 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 181 [2020-10-13 23:32:22,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:32:22,343 INFO L225 Difference]: With dead ends: 350 [2020-10-13 23:32:22,344 INFO L226 Difference]: Without dead ends: 207 [2020-10-13 23:32:22,344 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 [2020-10-13 23:32:22,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-13 23:32:22,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 200. [2020-10-13 23:32:22,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-10-13 23:32:22,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 208 transitions. [2020-10-13 23:32:22,354 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 208 transitions. Word has length 181 [2020-10-13 23:32:22,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:32:22,354 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 208 transitions. [2020-10-13 23:32:22,354 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 23:32:22,354 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 208 transitions. [2020-10-13 23:32:22,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-10-13 23:32:22,356 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:32:22,356 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:32:22,356 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 23:32:22,356 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:32:22,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:32:22,357 INFO L82 PathProgramCache]: Analyzing trace with hash -293789578, now seen corresponding path program 17 times [2020-10-13 23:32:22,357 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:32:22,357 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1470916164] [2020-10-13 23:32:22,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:32:22,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:22,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:22,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:22,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:22,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:22,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:27,520 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:27,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 203 [2020-10-13 23:32:27,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:32:27,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5148 [2020-10-13 23:32:27,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:27,521 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:27,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 23:32:27,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:32:27,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 23:32:27,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:27,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:32:27,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:27,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:27,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:27,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:32:27,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:32:27,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:32:27,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:27,609 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:27,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:32:27,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:32:27,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:32:27,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:27,631 INFO L134 CoverageAnalysis]: Checked inductivity of 896 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 847 trivial. 0 not checked. [2020-10-13 23:32:27,632 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1470916164] [2020-10-13 23:32:27,632 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:32:27,632 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 23:32:27,632 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85160904] [2020-10-13 23:32:27,633 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 23:32:27,633 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:32:27,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 23:32:27,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 23:32:27,634 INFO L87 Difference]: Start difference. First operand 200 states and 208 transitions. Second operand 11 states. [2020-10-13 23:32:27,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:32:27,764 INFO L93 Difference]: Finished difference Result 382 states and 398 transitions. [2020-10-13 23:32:27,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 23:32:27,765 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 195 [2020-10-13 23:32:27,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:32:27,769 INFO L225 Difference]: With dead ends: 382 [2020-10-13 23:32:27,769 INFO L226 Difference]: Without dead ends: 203 [2020-10-13 23:32:27,770 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 [2020-10-13 23:32:27,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-10-13 23:32:27,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 202. [2020-10-13 23:32:27,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-10-13 23:32:27,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 210 transitions. [2020-10-13 23:32:27,786 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 210 transitions. Word has length 195 [2020-10-13 23:32:27,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:32:27,787 INFO L479 AbstractCegarLoop]: Abstraction has 202 states and 210 transitions. [2020-10-13 23:32:27,787 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 23:32:27,787 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 210 transitions. [2020-10-13 23:32:27,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2020-10-13 23:32:27,788 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:32:27,789 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:32:27,789 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 23:32:27,789 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:32:27,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:32:27,789 INFO L82 PathProgramCache]: Analyzing trace with hash 948629140, now seen corresponding path program 18 times [2020-10-13 23:32:27,789 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:32:27,790 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [15363936] [2020-10-13 23:32:27,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:32:27,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:27,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:27,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:27,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:27,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:27,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:32,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:32,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 205 [2020-10-13 23:32:32,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:32:32,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5153 [2020-10-13 23:32:32,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:32,956 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:32,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 23:32:32,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 101 [2020-10-13 23:32:32,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 23:32:32,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:33,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:32:33,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:33,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:33,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:33,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:32:33,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:32:33,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:32:33,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:33,112 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:33,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:32:33,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:32:33,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:32:33,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:33,129 INFO L134 CoverageAnalysis]: Checked inductivity of 911 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 790 trivial. 0 not checked. [2020-10-13 23:32:33,129 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [15363936] [2020-10-13 23:32:33,129 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:32:33,129 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 23:32:33,129 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137726381] [2020-10-13 23:32:33,130 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 23:32:33,130 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:32:33,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 23:32:33,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 23:32:33,131 INFO L87 Difference]: Start difference. First operand 202 states and 210 transitions. Second operand 15 states. [2020-10-13 23:32:33,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:32:33,672 INFO L93 Difference]: Finished difference Result 378 states and 399 transitions. [2020-10-13 23:32:33,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 23:32:33,673 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 197 [2020-10-13 23:32:33,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:32:33,674 INFO L225 Difference]: With dead ends: 378 [2020-10-13 23:32:33,674 INFO L226 Difference]: Without dead ends: 223 [2020-10-13 23:32:33,675 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 [2020-10-13 23:32:33,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-10-13 23:32:33,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 216. [2020-10-13 23:32:33,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-10-13 23:32:33,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 224 transitions. [2020-10-13 23:32:33,684 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 224 transitions. Word has length 197 [2020-10-13 23:32:33,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:32:33,684 INFO L479 AbstractCegarLoop]: Abstraction has 216 states and 224 transitions. [2020-10-13 23:32:33,684 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 23:32:33,685 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 224 transitions. [2020-10-13 23:32:33,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2020-10-13 23:32:33,686 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:32:33,686 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:32:33,686 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 23:32:33,686 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:32:33,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:32:33,687 INFO L82 PathProgramCache]: Analyzing trace with hash -293906330, now seen corresponding path program 19 times [2020-10-13 23:32:33,687 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:32:33,687 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1682859867] [2020-10-13 23:32:33,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:32:33,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:33,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:33,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:33,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:33,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:33,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:38,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:38,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 219 [2020-10-13 23:32:38,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:32:38,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5056 [2020-10-13 23:32:38,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:38,758 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:38,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 23:32:38,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-10-13 23:32:38,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 23:32:38,759 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:38,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:32:38,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:38,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:38,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:38,917 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:32:38,917 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:32:38,917 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:32:38,917 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:38,917 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:38,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:32:38,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:32:38,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:32:38,918 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:38,947 INFO L134 CoverageAnalysis]: Checked inductivity of 1072 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 928 trivial. 0 not checked. [2020-10-13 23:32:38,947 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1682859867] [2020-10-13 23:32:38,947 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:32:38,947 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 23:32:38,948 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366121720] [2020-10-13 23:32:38,948 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 23:32:38,948 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:32:38,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 23:32:38,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:32:38,949 INFO L87 Difference]: Start difference. First operand 216 states and 224 transitions. Second operand 16 states. [2020-10-13 23:32:39,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:32:39,522 INFO L93 Difference]: Finished difference Result 404 states and 425 transitions. [2020-10-13 23:32:39,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 23:32:39,523 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 211 [2020-10-13 23:32:39,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:32:39,525 INFO L225 Difference]: With dead ends: 404 [2020-10-13 23:32:39,525 INFO L226 Difference]: Without dead ends: 237 [2020-10-13 23:32:39,526 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 [2020-10-13 23:32:39,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-10-13 23:32:39,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 230. [2020-10-13 23:32:39,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 230 states. [2020-10-13 23:32:39,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 238 transitions. [2020-10-13 23:32:39,539 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 238 transitions. Word has length 211 [2020-10-13 23:32:39,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:32:39,540 INFO L479 AbstractCegarLoop]: Abstraction has 230 states and 238 transitions. [2020-10-13 23:32:39,540 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 23:32:39,540 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 238 transitions. [2020-10-13 23:32:39,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2020-10-13 23:32:39,541 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:32:39,541 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:32:39,542 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 23:32:39,542 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:32:39,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:32:39,542 INFO L82 PathProgramCache]: Analyzing trace with hash 1227991736, now seen corresponding path program 20 times [2020-10-13 23:32:39,542 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:32:39,543 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1012814739] [2020-10-13 23:32:39,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:32:39,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:39,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:39,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:39,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:39,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:39,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:44,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:44,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 233 [2020-10-13 23:32:44,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:32:44,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-13 23:32:44,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:44,570 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:44,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 23:32:44,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:32:44,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 23:32:44,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:44,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:32:44,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:44,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:44,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:44,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:32:44,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:32:44,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:32:44,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:44,664 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:44,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:32:44,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:32:44,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:32:44,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:44,684 INFO L134 CoverageAnalysis]: Checked inductivity of 1247 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 1183 trivial. 0 not checked. [2020-10-13 23:32:44,684 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1012814739] [2020-10-13 23:32:44,684 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:32:44,684 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 23:32:44,685 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603669492] [2020-10-13 23:32:44,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 23:32:44,685 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:32:44,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 23:32:44,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:32:44,686 INFO L87 Difference]: Start difference. First operand 230 states and 238 transitions. Second operand 12 states. [2020-10-13 23:32:44,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:32:44,837 INFO L93 Difference]: Finished difference Result 440 states and 456 transitions. [2020-10-13 23:32:44,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 23:32:44,838 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 225 [2020-10-13 23:32:44,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:32:44,840 INFO L225 Difference]: With dead ends: 440 [2020-10-13 23:32:44,840 INFO L226 Difference]: Without dead ends: 233 [2020-10-13 23:32:44,842 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:32:44,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-13 23:32:44,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 232. [2020-10-13 23:32:44,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-10-13 23:32:44,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 240 transitions. [2020-10-13 23:32:44,851 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 240 transitions. Word has length 225 [2020-10-13 23:32:44,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:32:44,851 INFO L479 AbstractCegarLoop]: Abstraction has 232 states and 240 transitions. [2020-10-13 23:32:44,851 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 23:32:44,851 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 240 transitions. [2020-10-13 23:32:44,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2020-10-13 23:32:44,853 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:32:44,853 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:32:44,853 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 23:32:44,853 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:32:44,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:32:44,854 INFO L82 PathProgramCache]: Analyzing trace with hash 48918614, now seen corresponding path program 21 times [2020-10-13 23:32:44,854 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:32:44,854 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1346679398] [2020-10-13 23:32:44,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:32:44,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:44,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:44,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:44,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:44,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:45,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:49,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:49,998 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 235 [2020-10-13 23:32:49,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:32:49,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5129 [2020-10-13 23:32:49,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:49,999 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:49,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 23:32:49,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 59 [2020-10-13 23:32:49,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 23:32:49,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:50,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:32:50,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:50,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:50,173 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:50,173 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:32:50,173 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:32:50,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:32:50,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:50,173 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:50,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:32:50,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:32:50,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:32:50,174 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:50,193 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 1095 trivial. 0 not checked. [2020-10-13 23:32:50,194 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1346679398] [2020-10-13 23:32:50,194 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:32:50,194 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 23:32:50,194 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915063709] [2020-10-13 23:32:50,195 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 23:32:50,195 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:32:50,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 23:32:50,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 23:32:50,196 INFO L87 Difference]: Start difference. First operand 232 states and 240 transitions. Second operand 17 states. [2020-10-13 23:32:50,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:32:50,792 INFO L93 Difference]: Finished difference Result 432 states and 453 transitions. [2020-10-13 23:32:50,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 23:32:50,793 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 227 [2020-10-13 23:32:50,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:32:50,795 INFO L225 Difference]: With dead ends: 432 [2020-10-13 23:32:50,795 INFO L226 Difference]: Without dead ends: 253 [2020-10-13 23:32:50,796 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 [2020-10-13 23:32:50,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-10-13 23:32:50,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 246. [2020-10-13 23:32:50,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2020-10-13 23:32:50,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 254 transitions. [2020-10-13 23:32:50,805 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 254 transitions. Word has length 227 [2020-10-13 23:32:50,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:32:50,805 INFO L479 AbstractCegarLoop]: Abstraction has 246 states and 254 transitions. [2020-10-13 23:32:50,805 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 23:32:50,805 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 254 transitions. [2020-10-13 23:32:50,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-10-13 23:32:50,807 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:32:50,807 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:32:50,809 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 23:32:50,810 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:32:50,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:32:50,811 INFO L82 PathProgramCache]: Analyzing trace with hash -1360748888, now seen corresponding path program 22 times [2020-10-13 23:32:50,811 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:32:50,811 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1272971651] [2020-10-13 23:32:50,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:32:50,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:50,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:50,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:50,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:50,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:50,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:56,017 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:56,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 249 [2020-10-13 23:32:56,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:32:56,018 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5192 [2020-10-13 23:32:56,018 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:56,018 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:56,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 23:32:56,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:32:56,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 23:32:56,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:56,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:32:56,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:56,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:56,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:32:56,129 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:32:56,129 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:32:56,129 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:32:56,129 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:32:56,129 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:32:56,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:32:56,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:32:56,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:32:56,130 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:32:56,151 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 1372 trivial. 0 not checked. [2020-10-13 23:32:56,152 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1272971651] [2020-10-13 23:32:56,152 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:32:56,152 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 23:32:56,152 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408169504] [2020-10-13 23:32:56,152 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 23:32:56,152 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:32:56,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 23:32:56,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 23:32:56,153 INFO L87 Difference]: Start difference. First operand 246 states and 254 transitions. Second operand 13 states. [2020-10-13 23:32:56,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:32:56,306 INFO L93 Difference]: Finished difference Result 470 states and 486 transitions. [2020-10-13 23:32:56,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 23:32:56,306 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 241 [2020-10-13 23:32:56,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:32:56,308 INFO L225 Difference]: With dead ends: 470 [2020-10-13 23:32:56,308 INFO L226 Difference]: Without dead ends: 249 [2020-10-13 23:32:56,309 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 23:32:56,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2020-10-13 23:32:56,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 248. [2020-10-13 23:32:56,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 248 states. [2020-10-13 23:32:56,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 256 transitions. [2020-10-13 23:32:56,318 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 256 transitions. Word has length 241 [2020-10-13 23:32:56,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:32:56,318 INFO L479 AbstractCegarLoop]: Abstraction has 248 states and 256 transitions. [2020-10-13 23:32:56,318 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 23:32:56,319 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 256 transitions. [2020-10-13 23:32:56,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2020-10-13 23:32:56,320 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:32:56,320 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:32:56,321 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 23:32:56,321 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:32:56,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:32:56,321 INFO L82 PathProgramCache]: Analyzing trace with hash 2034919494, now seen corresponding path program 23 times [2020-10-13 23:32:56,322 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:32:56,322 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [917747075] [2020-10-13 23:32:56,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:32:56,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:32:56,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:56,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:56,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:56,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:32:56,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:01,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:01,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 251 [2020-10-13 23:33:01,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:33:01,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5045 [2020-10-13 23:33:01,390 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:01,390 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:01,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 23:33:01,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 93 [2020-10-13 23:33:01,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 23:33:01,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:01,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:33:01,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:01,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:01,598 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:01,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:33:01,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:33:01,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:33:01,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:01,598 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:01,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:33:01,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:33:01,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:33:01,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:01,622 INFO L134 CoverageAnalysis]: Checked inductivity of 1472 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2020-10-13 23:33:01,622 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [917747075] [2020-10-13 23:33:01,622 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:33:01,622 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 23:33:01,623 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607820066] [2020-10-13 23:33:01,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 23:33:01,623 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:33:01,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 23:33:01,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:33:01,624 INFO L87 Difference]: Start difference. First operand 248 states and 256 transitions. Second operand 18 states. [2020-10-13 23:33:02,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:33:02,252 INFO L93 Difference]: Finished difference Result 460 states and 481 transitions. [2020-10-13 23:33:02,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 23:33:02,253 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 243 [2020-10-13 23:33:02,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:33:02,255 INFO L225 Difference]: With dead ends: 460 [2020-10-13 23:33:02,255 INFO L226 Difference]: Without dead ends: 269 [2020-10-13 23:33:02,257 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 [2020-10-13 23:33:02,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-10-13 23:33:02,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 262. [2020-10-13 23:33:02,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-10-13 23:33:02,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 270 transitions. [2020-10-13 23:33:02,266 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 270 transitions. Word has length 243 [2020-10-13 23:33:02,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:33:02,266 INFO L479 AbstractCegarLoop]: Abstraction has 262 states and 270 transitions. [2020-10-13 23:33:02,266 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 23:33:02,266 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 270 transitions. [2020-10-13 23:33:02,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2020-10-13 23:33:02,268 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:33:02,268 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:33:02,268 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 23:33:02,268 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:33:02,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:33:02,270 INFO L82 PathProgramCache]: Analyzing trace with hash 445674136, now seen corresponding path program 24 times [2020-10-13 23:33:02,270 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:33:02,271 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [459713821] [2020-10-13 23:33:02,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:33:02,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:02,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:02,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:02,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:02,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:02,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:07,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:07,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 265 [2020-10-13 23:33:07,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:33:07,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5245 [2020-10-13 23:33:07,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:07,543 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:07,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 23:33:07,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:33:07,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 23:33:07,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:07,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:33:07,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:07,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:07,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:07,690 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:33:07,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:33:07,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:33:07,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:07,690 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:07,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:33:07,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:33:07,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:33:07,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:07,715 INFO L134 CoverageAnalysis]: Checked inductivity of 1675 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 1575 trivial. 0 not checked. [2020-10-13 23:33:07,715 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [459713821] [2020-10-13 23:33:07,716 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:33:07,716 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 23:33:07,716 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909115401] [2020-10-13 23:33:07,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 23:33:07,716 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:33:07,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 23:33:07,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:33:07,717 INFO L87 Difference]: Start difference. First operand 262 states and 270 transitions. Second operand 14 states. [2020-10-13 23:33:07,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:33:07,878 INFO L93 Difference]: Finished difference Result 500 states and 516 transitions. [2020-10-13 23:33:07,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 23:33:07,879 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 257 [2020-10-13 23:33:07,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:33:07,880 INFO L225 Difference]: With dead ends: 500 [2020-10-13 23:33:07,880 INFO L226 Difference]: Without dead ends: 265 [2020-10-13 23:33:07,881 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 [2020-10-13 23:33:07,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-10-13 23:33:07,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 264. [2020-10-13 23:33:07,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-10-13 23:33:07,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 272 transitions. [2020-10-13 23:33:07,891 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 272 transitions. Word has length 257 [2020-10-13 23:33:07,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:33:07,891 INFO L479 AbstractCegarLoop]: Abstraction has 264 states and 272 transitions. [2020-10-13 23:33:07,892 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 23:33:07,892 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 272 transitions. [2020-10-13 23:33:07,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2020-10-13 23:33:07,893 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:33:07,893 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:33:07,894 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 23:33:07,894 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:33:07,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:33:07,894 INFO L82 PathProgramCache]: Analyzing trace with hash -1558495178, now seen corresponding path program 25 times [2020-10-13 23:33:07,894 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:33:07,895 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [563762272] [2020-10-13 23:33:07,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:33:07,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:07,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:07,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:08,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:08,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:08,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:12,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:12,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 267 [2020-10-13 23:33:12,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:33:12,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-13 23:33:12,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:12,943 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:12,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 23:33:12,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 67 [2020-10-13 23:33:12,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 23:33:12,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:13,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:33:13,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:13,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:13,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:13,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:33:13,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:33:13,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:33:13,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:13,173 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:13,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:33:13,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:33:13,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:33:13,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:13,198 INFO L134 CoverageAnalysis]: Checked inductivity of 1696 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 1471 trivial. 0 not checked. [2020-10-13 23:33:13,199 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [563762272] [2020-10-13 23:33:13,199 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:33:13,199 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 23:33:13,199 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146039946] [2020-10-13 23:33:13,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 23:33:13,200 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:33:13,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 23:33:13,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 23:33:13,200 INFO L87 Difference]: Start difference. First operand 264 states and 272 transitions. Second operand 19 states. [2020-10-13 23:33:13,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:33:13,785 INFO L93 Difference]: Finished difference Result 488 states and 509 transitions. [2020-10-13 23:33:13,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 23:33:13,786 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 259 [2020-10-13 23:33:13,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:33:13,788 INFO L225 Difference]: With dead ends: 488 [2020-10-13 23:33:13,788 INFO L226 Difference]: Without dead ends: 285 [2020-10-13 23:33:13,789 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 [2020-10-13 23:33:13,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2020-10-13 23:33:13,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 278. [2020-10-13 23:33:13,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2020-10-13 23:33:13,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 286 transitions. [2020-10-13 23:33:13,797 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 286 transitions. Word has length 259 [2020-10-13 23:33:13,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:33:13,798 INFO L479 AbstractCegarLoop]: Abstraction has 278 states and 286 transitions. [2020-10-13 23:33:13,798 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 23:33:13,798 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 286 transitions. [2020-10-13 23:33:13,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2020-10-13 23:33:13,800 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:33:13,800 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:33:13,800 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 23:33:13,800 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:33:13,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:33:13,801 INFO L82 PathProgramCache]: Analyzing trace with hash -776657272, now seen corresponding path program 26 times [2020-10-13 23:33:13,801 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:33:13,801 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2046981190] [2020-10-13 23:33:13,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:33:13,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:13,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:13,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:13,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:14,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:14,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:19,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:19,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 281 [2020-10-13 23:33:19,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:33:19,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5322 [2020-10-13 23:33:19,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:19,146 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:19,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 23:33:19,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 103 [2020-10-13 23:33:19,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 23:33:19,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:19,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:33:19,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:19,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:19,521 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:19,521 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:33:19,521 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:33:19,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:33:19,522 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:19,522 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:19,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:33:19,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:33:19,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:33:19,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:33:19,607 INFO L134 CoverageAnalysis]: Checked inductivity of 1913 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 1657 trivial. 0 not checked. [2020-10-13 23:33:19,608 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2046981190] [2020-10-13 23:33:19,608 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:33:19,608 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 23:33:19,609 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350831570] [2020-10-13 23:33:19,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 23:33:19,610 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:33:19,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 23:33:19,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 23:33:19,611 INFO L87 Difference]: Start difference. First operand 278 states and 286 transitions. Second operand 20 states. [2020-10-13 23:33:20,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:33:20,375 INFO L93 Difference]: Finished difference Result 514 states and 535 transitions. [2020-10-13 23:33:20,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 23:33:20,375 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 273 [2020-10-13 23:33:20,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:33:20,377 INFO L225 Difference]: With dead ends: 514 [2020-10-13 23:33:20,377 INFO L226 Difference]: Without dead ends: 299 [2020-10-13 23:33:20,378 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 23:33:20,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2020-10-13 23:33:20,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 292. [2020-10-13 23:33:20,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 292 states. [2020-10-13 23:33:20,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 300 transitions. [2020-10-13 23:33:20,388 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 300 transitions. Word has length 273 [2020-10-13 23:33:20,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:33:20,388 INFO L479 AbstractCegarLoop]: Abstraction has 292 states and 300 transitions. [2020-10-13 23:33:20,389 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 23:33:20,389 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 300 transitions. [2020-10-13 23:33:20,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2020-10-13 23:33:20,391 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:33:20,391 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:33:20,391 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 23:33:20,391 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:33:20,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:33:20,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1388385626, now seen corresponding path program 27 times [2020-10-13 23:33:20,392 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:33:20,392 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1077540102] [2020-10-13 23:33:20,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:33:20,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:20,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:20,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:20,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:20,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:20,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:25,747 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:25,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 295 [2020-10-13 23:33:25,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:33:25,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5333 [2020-10-13 23:33:25,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:25,748 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:25,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 23:33:25,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:33:25,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 23:33:25,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:25,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:33:25,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:25,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:25,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:25,917 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:33:25,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:33:25,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:33:25,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:25,919 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:25,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:33:25,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:33:25,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:33:25,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:33:26,023 INFO L134 CoverageAnalysis]: Checked inductivity of 2144 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 2023 trivial. 0 not checked. [2020-10-13 23:33:26,024 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1077540102] [2020-10-13 23:33:26,024 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:33:26,024 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 23:33:26,024 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758611458] [2020-10-13 23:33:26,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 23:33:26,025 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:33:26,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 23:33:26,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 23:33:26,026 INFO L87 Difference]: Start difference. First operand 292 states and 300 transitions. Second operand 15 states. [2020-10-13 23:33:26,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:33:26,213 INFO L93 Difference]: Finished difference Result 558 states and 574 transitions. [2020-10-13 23:33:26,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 23:33:26,213 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 287 [2020-10-13 23:33:26,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:33:26,215 INFO L225 Difference]: With dead ends: 558 [2020-10-13 23:33:26,215 INFO L226 Difference]: Without dead ends: 295 [2020-10-13 23:33:26,216 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 [2020-10-13 23:33:26,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2020-10-13 23:33:26,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 294. [2020-10-13 23:33:26,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2020-10-13 23:33:26,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 302 transitions. [2020-10-13 23:33:26,227 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 302 transitions. Word has length 287 [2020-10-13 23:33:26,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:33:26,228 INFO L479 AbstractCegarLoop]: Abstraction has 294 states and 302 transitions. [2020-10-13 23:33:26,228 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 23:33:26,228 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 302 transitions. [2020-10-13 23:33:26,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2020-10-13 23:33:26,230 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:33:26,230 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:33:26,230 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 23:33:26,230 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:33:26,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:33:26,231 INFO L82 PathProgramCache]: Analyzing trace with hash 500349560, now seen corresponding path program 28 times [2020-10-13 23:33:26,231 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:33:26,231 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1219349866] [2020-10-13 23:33:26,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:33:26,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:26,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:26,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:26,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:26,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:26,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:31,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:31,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 297 [2020-10-13 23:33:31,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:33:31,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5127 [2020-10-13 23:33:31,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:31,382 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:31,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 23:33:31,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-13 23:33:31,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 23:33:31,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:31,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:33:31,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:31,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:31,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:31,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:33:31,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:33:31,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:33:31,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:31,663 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:31,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:33:31,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:33:31,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:33:31,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:31,696 INFO L134 CoverageAnalysis]: Checked inductivity of 2167 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 1878 trivial. 0 not checked. [2020-10-13 23:33:31,696 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1219349866] [2020-10-13 23:33:31,696 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:33:31,696 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 23:33:31,697 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410865307] [2020-10-13 23:33:31,697 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 23:33:31,697 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:33:31,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 23:33:31,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 23:33:31,698 INFO L87 Difference]: Start difference. First operand 294 states and 302 transitions. Second operand 21 states. [2020-10-13 23:33:32,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:33:32,426 INFO L93 Difference]: Finished difference Result 542 states and 563 transitions. [2020-10-13 23:33:32,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 23:33:32,426 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 289 [2020-10-13 23:33:32,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:33:32,428 INFO L225 Difference]: With dead ends: 542 [2020-10-13 23:33:32,428 INFO L226 Difference]: Without dead ends: 315 [2020-10-13 23:33:32,430 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 [2020-10-13 23:33:32,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2020-10-13 23:33:32,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 308. [2020-10-13 23:33:32,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 308 states. [2020-10-13 23:33:32,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 316 transitions. [2020-10-13 23:33:32,440 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 316 transitions. Word has length 289 [2020-10-13 23:33:32,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:33:32,440 INFO L479 AbstractCegarLoop]: Abstraction has 308 states and 316 transitions. [2020-10-13 23:33:32,440 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 23:33:32,440 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 316 transitions. [2020-10-13 23:33:32,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2020-10-13 23:33:32,442 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:33:32,442 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:33:32,443 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-13 23:33:32,443 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:33:32,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:33:32,444 INFO L82 PathProgramCache]: Analyzing trace with hash -749107894, now seen corresponding path program 29 times [2020-10-13 23:33:32,444 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:33:32,444 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1684129918] [2020-10-13 23:33:32,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:33:32,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:32,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:32,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:32,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:32,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:32,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:37,760 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:37,760 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 311 [2020-10-13 23:33:37,760 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:33:37,760 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5292 [2020-10-13 23:33:37,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:37,760 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:37,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 23:33:37,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:33:37,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 23:33:37,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:37,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:33:37,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:37,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:37,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:37,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:33:37,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:33:37,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:33:37,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:37,933 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:37,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:33:37,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:33:37,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:33:37,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:37,966 INFO L134 CoverageAnalysis]: Checked inductivity of 2412 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 2268 trivial. 0 not checked. [2020-10-13 23:33:37,967 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1684129918] [2020-10-13 23:33:37,967 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:33:37,967 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 23:33:37,967 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773453055] [2020-10-13 23:33:37,968 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 23:33:37,968 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:33:37,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 23:33:37,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:33:37,968 INFO L87 Difference]: Start difference. First operand 308 states and 316 transitions. Second operand 16 states. [2020-10-13 23:33:38,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:33:38,123 INFO L93 Difference]: Finished difference Result 588 states and 604 transitions. [2020-10-13 23:33:38,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 23:33:38,124 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 303 [2020-10-13 23:33:38,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:33:38,125 INFO L225 Difference]: With dead ends: 588 [2020-10-13 23:33:38,125 INFO L226 Difference]: Without dead ends: 311 [2020-10-13 23:33:38,126 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 [2020-10-13 23:33:38,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2020-10-13 23:33:38,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 310. [2020-10-13 23:33:38,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 310 states. [2020-10-13 23:33:38,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 318 transitions. [2020-10-13 23:33:38,135 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 318 transitions. Word has length 303 [2020-10-13 23:33:38,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:33:38,135 INFO L479 AbstractCegarLoop]: Abstraction has 310 states and 318 transitions. [2020-10-13 23:33:38,135 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 23:33:38,135 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 318 transitions. [2020-10-13 23:33:38,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2020-10-13 23:33:38,137 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:33:38,137 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:33:38,138 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-13 23:33:38,138 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:33:38,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:33:38,139 INFO L82 PathProgramCache]: Analyzing trace with hash 1281961576, now seen corresponding path program 30 times [2020-10-13 23:33:38,139 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:33:38,140 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1365938300] [2020-10-13 23:33:38,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:33:38,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:38,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:38,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:38,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:38,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:38,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:43,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:43,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 313 [2020-10-13 23:33:43,413 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:33:43,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5240 [2020-10-13 23:33:43,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:43,413 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:43,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 23:33:43,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 77 [2020-10-13 23:33:43,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 23:33:43,414 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:43,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:33:43,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:43,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:43,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:43,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:33:43,720 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:33:43,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:33:43,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:43,720 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:43,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:33:43,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:33:43,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:33:43,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:43,756 INFO L134 CoverageAnalysis]: Checked inductivity of 2437 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 2113 trivial. 0 not checked. [2020-10-13 23:33:43,757 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1365938300] [2020-10-13 23:33:43,757 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:33:43,757 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 23:33:43,757 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640080046] [2020-10-13 23:33:43,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 23:33:43,759 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:33:43,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 23:33:43,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 23:33:43,759 INFO L87 Difference]: Start difference. First operand 310 states and 318 transitions. Second operand 22 states. [2020-10-13 23:33:44,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:33:44,453 INFO L93 Difference]: Finished difference Result 570 states and 591 transitions. [2020-10-13 23:33:44,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 23:33:44,454 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 305 [2020-10-13 23:33:44,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:33:44,456 INFO L225 Difference]: With dead ends: 570 [2020-10-13 23:33:44,457 INFO L226 Difference]: Without dead ends: 331 [2020-10-13 23:33:44,458 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 [2020-10-13 23:33:44,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2020-10-13 23:33:44,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 324. [2020-10-13 23:33:44,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 324 states. [2020-10-13 23:33:44,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 332 transitions. [2020-10-13 23:33:44,468 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 332 transitions. Word has length 305 [2020-10-13 23:33:44,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:33:44,468 INFO L479 AbstractCegarLoop]: Abstraction has 324 states and 332 transitions. [2020-10-13 23:33:44,468 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 23:33:44,468 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 332 transitions. [2020-10-13 23:33:44,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2020-10-13 23:33:44,470 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:33:44,471 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:33:44,471 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-13 23:33:44,471 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:33:44,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:33:44,471 INFO L82 PathProgramCache]: Analyzing trace with hash -1670195910, now seen corresponding path program 31 times [2020-10-13 23:33:44,472 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:33:44,472 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [288714188] [2020-10-13 23:33:44,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:33:44,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:44,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:44,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:44,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:44,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:44,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:50,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:50,004 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 327 [2020-10-13 23:33:50,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:33:50,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5507 [2020-10-13 23:33:50,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:50,005 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:50,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 23:33:50,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 79 [2020-10-13 23:33:50,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 23:33:50,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:50,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:33:50,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:50,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:50,338 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:50,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:33:50,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:33:50,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:33:50,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:50,340 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:50,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:33:50,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:33:50,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:33:50,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:50,379 INFO L134 CoverageAnalysis]: Checked inductivity of 2696 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 2335 trivial. 0 not checked. [2020-10-13 23:33:50,379 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [288714188] [2020-10-13 23:33:50,379 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:33:50,379 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 23:33:50,380 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501212232] [2020-10-13 23:33:50,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 23:33:50,380 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:33:50,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 23:33:50,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 23:33:50,381 INFO L87 Difference]: Start difference. First operand 324 states and 332 transitions. Second operand 23 states. [2020-10-13 23:33:51,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:33:51,190 INFO L93 Difference]: Finished difference Result 596 states and 617 transitions. [2020-10-13 23:33:51,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 23:33:51,191 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 319 [2020-10-13 23:33:51,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:33:51,194 INFO L225 Difference]: With dead ends: 596 [2020-10-13 23:33:51,194 INFO L226 Difference]: Without dead ends: 345 [2020-10-13 23:33:51,195 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 [2020-10-13 23:33:51,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2020-10-13 23:33:51,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 338. [2020-10-13 23:33:51,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 338 states. [2020-10-13 23:33:51,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 346 transitions. [2020-10-13 23:33:51,205 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 346 transitions. Word has length 319 [2020-10-13 23:33:51,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:33:51,205 INFO L479 AbstractCegarLoop]: Abstraction has 338 states and 346 transitions. [2020-10-13 23:33:51,205 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 23:33:51,205 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 346 transitions. [2020-10-13 23:33:51,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-10-13 23:33:51,207 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:33:51,208 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:33:51,208 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-13 23:33:51,208 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:33:51,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:33:51,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1598268556, now seen corresponding path program 32 times [2020-10-13 23:33:51,209 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:33:51,209 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1767610358] [2020-10-13 23:33:51,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:33:51,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:51,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:51,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:51,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:51,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:51,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:56,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:56,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 341 [2020-10-13 23:33:56,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:33:56,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5191 [2020-10-13 23:33:56,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:56,424 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:56,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 23:33:56,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:33:56,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 23:33:56,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:56,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:33:56,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:56,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:56,603 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:33:56,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:33:56,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:33:56,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:33:56,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:33:56,604 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:33:56,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:33:56,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:33:56,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:33:56,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:33:56,643 INFO L134 CoverageAnalysis]: Checked inductivity of 2969 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 2800 trivial. 0 not checked. [2020-10-13 23:33:56,644 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1767610358] [2020-10-13 23:33:56,644 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:33:56,644 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 23:33:56,644 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410725978] [2020-10-13 23:33:56,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 23:33:56,645 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:33:56,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 23:33:56,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 23:33:56,645 INFO L87 Difference]: Start difference. First operand 338 states and 346 transitions. Second operand 17 states. [2020-10-13 23:33:56,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:33:56,827 INFO L93 Difference]: Finished difference Result 646 states and 662 transitions. [2020-10-13 23:33:56,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 23:33:56,828 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 333 [2020-10-13 23:33:56,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:33:56,830 INFO L225 Difference]: With dead ends: 646 [2020-10-13 23:33:56,830 INFO L226 Difference]: Without dead ends: 341 [2020-10-13 23:33:56,831 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 [2020-10-13 23:33:56,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2020-10-13 23:33:56,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 340. [2020-10-13 23:33:56,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 340 states. [2020-10-13 23:33:56,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 348 transitions. [2020-10-13 23:33:56,840 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 348 transitions. Word has length 333 [2020-10-13 23:33:56,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:33:56,841 INFO L479 AbstractCegarLoop]: Abstraction has 340 states and 348 transitions. [2020-10-13 23:33:56,841 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 23:33:56,841 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 348 transitions. [2020-10-13 23:33:56,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2020-10-13 23:33:56,843 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:33:56,843 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:33:56,843 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-13 23:33:56,844 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:33:56,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:33:56,844 INFO L82 PathProgramCache]: Analyzing trace with hash -208861910, now seen corresponding path program 33 times [2020-10-13 23:33:56,844 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:33:56,844 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [852299930] [2020-10-13 23:33:56,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:33:56,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:33:56,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:56,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:57,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:57,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:33:57,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:01,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:01,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 343 [2020-10-13 23:34:01,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:34:01,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-13 23:34:01,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:01,896 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:01,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 23:34:01,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-13 23:34:01,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 23:34:01,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:34:02,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:34:02,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:02,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:02,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:02,242 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:34:02,242 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:02,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:34:02,242 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:02,242 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:02,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:34:02,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:34:02,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:34:02,243 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:34:02,284 INFO L134 CoverageAnalysis]: Checked inductivity of 2996 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 2596 trivial. 0 not checked. [2020-10-13 23:34:02,284 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [852299930] [2020-10-13 23:34:02,284 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:34:02,284 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 23:34:02,284 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582634850] [2020-10-13 23:34:02,285 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 23:34:02,285 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:34:02,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 23:34:02,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 23:34:02,286 INFO L87 Difference]: Start difference. First operand 340 states and 348 transitions. Second operand 24 states. [2020-10-13 23:34:03,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:34:03,134 INFO L93 Difference]: Finished difference Result 624 states and 645 transitions. [2020-10-13 23:34:03,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 23:34:03,135 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 335 [2020-10-13 23:34:03,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:34:03,137 INFO L225 Difference]: With dead ends: 624 [2020-10-13 23:34:03,137 INFO L226 Difference]: Without dead ends: 361 [2020-10-13 23:34:03,139 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 23:34:03,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2020-10-13 23:34:03,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 354. [2020-10-13 23:34:03,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 354 states. [2020-10-13 23:34:03,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 362 transitions. [2020-10-13 23:34:03,147 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 362 transitions. Word has length 335 [2020-10-13 23:34:03,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:34:03,148 INFO L479 AbstractCegarLoop]: Abstraction has 354 states and 362 transitions. [2020-10-13 23:34:03,148 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 23:34:03,148 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 362 transitions. [2020-10-13 23:34:03,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 350 [2020-10-13 23:34:03,150 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:34:03,150 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:34:03,150 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-13 23:34:03,151 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:34:03,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:34:03,151 INFO L82 PathProgramCache]: Analyzing trace with hash -1010323332, now seen corresponding path program 34 times [2020-10-13 23:34:03,151 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:34:03,151 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [436592104] [2020-10-13 23:34:03,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:34:03,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:03,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:03,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:03,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:03,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:03,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:08,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:08,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 357 [2020-10-13 23:34:08,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:34:08,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5335 [2020-10-13 23:34:08,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:08,514 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:08,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 23:34:08,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:34:08,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 23:34:08,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:34:08,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:34:08,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:08,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:08,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:08,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:34:08,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:08,753 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:34:08,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:08,754 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:08,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:34:08,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:34:08,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:34:08,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:34:08,829 INFO L134 CoverageAnalysis]: Checked inductivity of 3283 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 3087 trivial. 0 not checked. [2020-10-13 23:34:08,831 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [436592104] [2020-10-13 23:34:08,831 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:34:08,831 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 23:34:08,832 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473165267] [2020-10-13 23:34:08,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 23:34:08,834 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:34:08,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 23:34:08,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:34:08,835 INFO L87 Difference]: Start difference. First operand 354 states and 362 transitions. Second operand 18 states. [2020-10-13 23:34:09,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:34:09,012 INFO L93 Difference]: Finished difference Result 676 states and 692 transitions. [2020-10-13 23:34:09,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 23:34:09,012 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 349 [2020-10-13 23:34:09,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:34:09,015 INFO L225 Difference]: With dead ends: 676 [2020-10-13 23:34:09,016 INFO L226 Difference]: Without dead ends: 357 [2020-10-13 23:34:09,017 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:34:09,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2020-10-13 23:34:09,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 356. [2020-10-13 23:34:09,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 356 states. [2020-10-13 23:34:09,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 364 transitions. [2020-10-13 23:34:09,025 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 364 transitions. Word has length 349 [2020-10-13 23:34:09,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:34:09,025 INFO L479 AbstractCegarLoop]: Abstraction has 356 states and 364 transitions. [2020-10-13 23:34:09,025 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 23:34:09,025 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 364 transitions. [2020-10-13 23:34:09,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2020-10-13 23:34:09,027 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:34:09,028 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:34:09,028 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-13 23:34:09,028 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:34:09,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:34:09,028 INFO L82 PathProgramCache]: Analyzing trace with hash 573052186, now seen corresponding path program 35 times [2020-10-13 23:34:09,029 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:34:09,029 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1780002714] [2020-10-13 23:34:09,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:34:09,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:09,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:09,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:09,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:09,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:09,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:14,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:14,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 359 [2020-10-13 23:34:14,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:34:14,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 23:34:14,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:14,056 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:14,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 23:34:14,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 131 [2020-10-13 23:34:14,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 23:34:14,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:34:14,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:34:14,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:14,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:14,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:14,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:34:14,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:14,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:34:14,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:14,444 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:14,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:34:14,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:34:14,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:34:14,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:34:14,492 INFO L134 CoverageAnalysis]: Checked inductivity of 3312 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 2871 trivial. 0 not checked. [2020-10-13 23:34:14,493 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1780002714] [2020-10-13 23:34:14,493 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:34:14,493 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 23:34:14,493 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506313100] [2020-10-13 23:34:14,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 23:34:14,494 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:34:14,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 23:34:14,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 23:34:14,494 INFO L87 Difference]: Start difference. First operand 356 states and 364 transitions. Second operand 25 states. [2020-10-13 23:34:15,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:34:15,369 INFO L93 Difference]: Finished difference Result 652 states and 673 transitions. [2020-10-13 23:34:15,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 23:34:15,369 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 351 [2020-10-13 23:34:15,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:34:15,371 INFO L225 Difference]: With dead ends: 652 [2020-10-13 23:34:15,371 INFO L226 Difference]: Without dead ends: 377 [2020-10-13 23:34:15,372 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 [2020-10-13 23:34:15,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2020-10-13 23:34:15,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 370. [2020-10-13 23:34:15,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 370 states. [2020-10-13 23:34:15,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 378 transitions. [2020-10-13 23:34:15,380 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 378 transitions. Word has length 351 [2020-10-13 23:34:15,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:34:15,381 INFO L479 AbstractCegarLoop]: Abstraction has 370 states and 378 transitions. [2020-10-13 23:34:15,381 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 23:34:15,381 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 378 transitions. [2020-10-13 23:34:15,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 366 [2020-10-13 23:34:15,383 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:34:15,384 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:34:15,384 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-13 23:34:15,384 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:34:15,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:34:15,384 INFO L82 PathProgramCache]: Analyzing trace with hash -1277911956, now seen corresponding path program 36 times [2020-10-13 23:34:15,384 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:34:15,385 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [185118066] [2020-10-13 23:34:15,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:34:15,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:15,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:15,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:15,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:15,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:15,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:20,420 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:20,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 373 [2020-10-13 23:34:20,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:34:20,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-13 23:34:20,421 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:20,421 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:20,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 23:34:20,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 23:34:20,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 23:34:20,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:34:20,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:34:20,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:20,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:20,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:20,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:34:20,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:20,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:34:20,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:20,652 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:20,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:34:20,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:34:20,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:34:20,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:34:20,736 INFO L134 CoverageAnalysis]: Checked inductivity of 3613 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 3388 trivial. 0 not checked. [2020-10-13 23:34:20,737 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [185118066] [2020-10-13 23:34:20,737 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:34:20,737 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 23:34:20,737 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683383565] [2020-10-13 23:34:20,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 23:34:20,738 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:34:20,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 23:34:20,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 23:34:20,739 INFO L87 Difference]: Start difference. First operand 370 states and 378 transitions. Second operand 19 states. [2020-10-13 23:34:20,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:34:20,892 INFO L93 Difference]: Finished difference Result 706 states and 722 transitions. [2020-10-13 23:34:20,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 23:34:20,892 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 365 [2020-10-13 23:34:20,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:34:20,895 INFO L225 Difference]: With dead ends: 706 [2020-10-13 23:34:20,895 INFO L226 Difference]: Without dead ends: 373 [2020-10-13 23:34:20,897 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 23:34:20,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2020-10-13 23:34:20,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 372. [2020-10-13 23:34:20,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 372 states. [2020-10-13 23:34:20,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 380 transitions. [2020-10-13 23:34:20,905 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 380 transitions. Word has length 365 [2020-10-13 23:34:20,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:34:20,905 INFO L479 AbstractCegarLoop]: Abstraction has 372 states and 380 transitions. [2020-10-13 23:34:20,905 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 23:34:20,906 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 380 transitions. [2020-10-13 23:34:20,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 368 [2020-10-13 23:34:20,908 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:34:20,908 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:34:20,908 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-13 23:34:20,908 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:34:20,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:34:20,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1975780618, now seen corresponding path program 37 times [2020-10-13 23:34:20,909 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:34:20,909 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [363829040] [2020-10-13 23:34:20,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:34:20,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:20,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:21,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:21,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:21,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:21,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:26,436 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:26,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 375 [2020-10-13 23:34:26,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:34:26,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5502 [2020-10-13 23:34:26,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:26,437 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:26,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 23:34:26,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 183 [2020-10-13 23:34:26,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-13 23:34:26,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:34:26,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:34:26,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:26,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:26,857 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:34:26,857 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:34:26,857 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:34:26,857 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:34:26,858 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:34:26,858 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:34:26,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:34:26,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:34:26,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:34:26,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:34:26,912 INFO L134 CoverageAnalysis]: Checked inductivity of 3644 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 3160 trivial. 0 not checked. [2020-10-13 23:34:26,912 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [363829040] [2020-10-13 23:34:26,912 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:34:26,912 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 23:34:26,913 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84776859] [2020-10-13 23:34:26,913 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 23:34:26,913 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:34:26,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 23:34:26,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 23:34:26,914 INFO L87 Difference]: Start difference. First operand 372 states and 380 transitions. Second operand 26 states. [2020-10-13 23:34:27,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:34:27,845 INFO L93 Difference]: Finished difference Result 680 states and 701 transitions. [2020-10-13 23:34:27,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 23:34:27,846 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 367 [2020-10-13 23:34:27,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:34:27,848 INFO L225 Difference]: With dead ends: 680 [2020-10-13 23:34:27,848 INFO L226 Difference]: Without dead ends: 393 [2020-10-13 23:34:27,850 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 [2020-10-13 23:34:27,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2020-10-13 23:34:27,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 386. [2020-10-13 23:34:27,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 386 states. [2020-10-13 23:34:27,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 394 transitions. [2020-10-13 23:34:27,859 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 394 transitions. Word has length 367 [2020-10-13 23:34:27,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:34:27,859 INFO L479 AbstractCegarLoop]: Abstraction has 386 states and 394 transitions. [2020-10-13 23:34:27,860 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 23:34:27,860 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 394 transitions. [2020-10-13 23:34:27,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 382 [2020-10-13 23:34:27,862 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:34:27,862 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:34:27,862 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-13 23:34:27,863 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:34:27,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:34:27,863 INFO L82 PathProgramCache]: Analyzing trace with hash 1894410332, now seen corresponding path program 38 times [2020-10-13 23:34:27,863 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:34:27,864 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1933783092] [2020-10-13 23:34:27,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:34:27,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:34:27,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:27,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:28,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:28,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:34:28,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking...