/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.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=DEEPEST --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 language data_model -i ../../../trunk/examples/svcomp/array-examples/standard_copy3_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 14:18:40,013 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 14:18:40,017 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 14:18:40,057 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 14:18:40,058 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 14:18:40,059 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 14:18:40,061 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 14:18:40,063 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 14:18:40,065 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 14:18:40,066 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 14:18:40,068 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 14:18:40,069 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 14:18:40,070 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 14:18:40,071 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 14:18:40,072 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 14:18:40,073 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 14:18:40,074 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 14:18:40,076 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 14:18:40,091 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 14:18:40,094 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 14:18:40,095 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 14:18:40,097 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 14:18:40,098 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 14:18:40,099 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 14:18:40,102 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 14:18:40,103 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 14:18:40,103 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 14:18:40,104 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 14:18:40,105 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 14:18:40,106 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 14:18:40,106 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 14:18:40,107 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 14:18:40,108 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 14:18:40,109 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 14:18:40,110 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 14:18:40,111 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 14:18:40,111 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 14:18:40,112 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 14:18:40,112 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 14:18:40,113 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 14:18:40,114 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 14:18:40,115 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 [2020-10-27 14:18:40,143 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 14:18:40,144 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 14:18:40,145 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 14:18:40,146 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 14:18:40,146 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 14:18:40,146 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 14:18:40,147 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 14:18:40,147 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 14:18:40,147 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 14:18:40,147 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 14:18:40,148 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 14:18:40,148 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 14:18:40,148 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 14:18:40,148 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 14:18:40,148 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 14:18:40,149 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 14:18:40,149 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 14:18:40,149 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 14:18:40,149 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 14:18:40,150 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 14:18:40,150 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 14:18:40,150 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 14:18:40,150 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 14:18:40,151 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 14:18:40,151 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 14:18:40,151 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 14:18:40,151 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 14:18:40,152 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 14:18:40,152 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 14:18:40,152 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 14:18:40,558 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 14:18:40,589 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 14:18:40,593 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 14:18:40,595 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 14:18:40,596 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 14:18:40,598 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy3_ground-2.i [2020-10-27 14:18:40,691 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/53d837e51/a76ccee35d2b44c587337922e1c0d5dd/FLAG1a81eadb4 [2020-10-27 14:18:41,445 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 14:18:41,446 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_copy3_ground-2.i [2020-10-27 14:18:41,456 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/53d837e51/a76ccee35d2b44c587337922e1c0d5dd/FLAG1a81eadb4 [2020-10-27 14:18:41,787 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/53d837e51/a76ccee35d2b44c587337922e1c0d5dd [2020-10-27 14:18:41,790 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 14:18:41,797 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 14:18:41,799 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 14:18:41,800 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 14:18:41,803 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 14:18:41,804 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:18:41" (1/1) ... [2020-10-27 14:18:41,807 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d667cec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:18:41, skipping insertion in model container [2020-10-27 14:18:41,808 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:18:41" (1/1) ... [2020-10-27 14:18:41,816 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 14:18:41,831 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 14:18:42,007 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:18:42,016 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 14:18:42,040 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:18:42,056 INFO L208 MainTranslator]: Completed translation [2020-10-27 14:18:42,057 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:18:42 WrapperNode [2020-10-27 14:18:42,057 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 14:18:42,058 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 14:18:42,058 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 14:18:42,058 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 14:18:42,071 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:18:42" (1/1) ... [2020-10-27 14:18:42,071 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:18:42" (1/1) ... [2020-10-27 14:18:42,079 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:18:42" (1/1) ... [2020-10-27 14:18:42,080 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:18:42" (1/1) ... [2020-10-27 14:18:42,089 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:18:42" (1/1) ... [2020-10-27 14:18:42,095 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:18:42" (1/1) ... [2020-10-27 14:18:42,096 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:18:42" (1/1) ... [2020-10-27 14:18:42,099 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 14:18:42,100 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 14:18:42,100 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 14:18:42,101 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 14:18:42,101 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:18:42" (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 [2020-10-27 14:18:42,179 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 14:18:42,179 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 14:18:42,180 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 14:18:42,180 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 14:18:42,180 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 14:18:42,180 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 14:18:42,180 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 14:18:42,180 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 14:18:42,181 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 14:18:42,181 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 14:18:42,181 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 14:18:42,181 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 14:18:42,181 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 14:18:42,182 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 14:18:42,182 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 14:18:42,182 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 14:18:42,182 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 14:18:42,182 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 14:18:42,182 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 14:18:42,183 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 14:18:42,525 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 14:18:42,525 INFO L298 CfgBuilder]: Removed 5 assume(true) statements. [2020-10-27 14:18:42,527 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:18:42 BoogieIcfgContainer [2020-10-27 14:18:42,527 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 14:18:42,529 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 14:18:42,529 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 14:18:42,533 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 14:18:42,533 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 02:18:41" (1/3) ... [2020-10-27 14:18:42,534 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fbd62a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:18:42, skipping insertion in model container [2020-10-27 14:18:42,534 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:18:42" (2/3) ... [2020-10-27 14:18:42,535 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fbd62a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:18:42, skipping insertion in model container [2020-10-27 14:18:42,535 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:18:42" (3/3) ... [2020-10-27 14:18:42,537 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_copy3_ground-2.i [2020-10-27 14:18:42,549 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 14:18:42,555 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 14:18:42,569 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 14:18:42,597 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 14:18:42,598 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 14:18:42,598 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 14:18:42,598 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 14:18:42,598 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 14:18:42,598 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 14:18:42,599 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 14:18:42,599 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 14:18:42,618 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-10-27 14:18:42,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 14:18:42,625 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:18:42,625 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:18:42,626 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:18:42,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:18:42,633 INFO L82 PathProgramCache]: Analyzing trace with hash 2093384956, now seen corresponding path program 1 times [2020-10-27 14:18:42,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:18:42,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [722329281] [2020-10-27 14:18:42,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:18:42,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:18:42,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:42,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:42,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:43,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:43,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:18:43,400 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 14:18:43,400 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:18:43,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 574 [2020-10-27 14:18:43,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:18:43,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:18:43,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 14:18:43,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 14:18:43,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-27 14:18:43,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:18:43,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:18:43,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:43,530 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:18:43,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:18:43,531 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:18:43,531 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 14:18:43,531 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:18:43,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:18:43,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:18:43,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:18:43,532 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:18:43,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:18:43,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [722329281] [2020-10-27 14:18:43,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:18:43,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 14:18:43,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737914584] [2020-10-27 14:18:43,553 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 14:18:43,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:18:43,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 14:18:43,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 14:18:43,574 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 4 states. [2020-10-27 14:18:43,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:18:43,748 INFO L93 Difference]: Finished difference Result 71 states and 99 transitions. [2020-10-27 14:18:43,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 14:18:43,750 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-10-27 14:18:43,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:18:43,760 INFO L225 Difference]: With dead ends: 71 [2020-10-27 14:18:43,760 INFO L226 Difference]: Without dead ends: 36 [2020-10-27 14:18:43,765 INFO L677 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 [2020-10-27 14:18:43,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-27 14:18:43,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2020-10-27 14:18:43,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-27 14:18:43,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-10-27 14:18:43,816 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 21 [2020-10-27 14:18:43,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:18:43,817 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-10-27 14:18:43,817 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 14:18:43,817 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-10-27 14:18:43,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 14:18:43,819 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:18:43,819 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] [2020-10-27 14:18:43,819 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 14:18:43,820 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:18:43,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:18:43,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1785823484, now seen corresponding path program 1 times [2020-10-27 14:18:43,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:18:43,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2109816936] [2020-10-27 14:18:43,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:18:43,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:18:43,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:43,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:43,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:43,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:44,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:46,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:18:46,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 14:18:46,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:18:46,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2724 [2020-10-27 14:18:46,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:18:46,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 14:18:46,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 14:18:46,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 14:18:46,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:18:46,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:18:46,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:18:46,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:46,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:18:46,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:18:46,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:18:46,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 14:18:46,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:18:46,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:18:46,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:18:46,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:18:46,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-27 14:18:46,670 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 14:18:46,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2109816936] [2020-10-27 14:18:46,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:18:46,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 14:18:46,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62973419] [2020-10-27 14:18:46,673 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 14:18:46,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:18:46,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 14:18:46,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 14:18:46,677 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 5 states. [2020-10-27 14:18:46,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:18:46,883 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2020-10-27 14:18:46,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 14:18:46,885 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2020-10-27 14:18:46,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:18:46,886 INFO L225 Difference]: With dead ends: 63 [2020-10-27 14:18:46,886 INFO L226 Difference]: Without dead ends: 42 [2020-10-27 14:18:46,889 INFO L677 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 [2020-10-27 14:18:46,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-27 14:18:46,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2020-10-27 14:18:46,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-27 14:18:46,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2020-10-27 14:18:46,910 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 27 [2020-10-27 14:18:46,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:18:46,910 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2020-10-27 14:18:46,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 14:18:46,911 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2020-10-27 14:18:46,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 14:18:46,913 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:18:46,913 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:18:46,913 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 14:18:46,913 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:18:46,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:18:46,917 INFO L82 PathProgramCache]: Analyzing trace with hash -385887586, now seen corresponding path program 2 times [2020-10-27 14:18:46,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:18:46,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1456327696] [2020-10-27 14:18:46,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:18:46,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:18:46,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:46,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:46,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:47,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:48,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:51,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:18:51,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 14:18:51,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:18:51,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 14:18:51,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:18:51,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 14:18:51,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-27 14:18:51,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:18:51,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:18:52,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:18:52,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:18:52,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:52,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:18:52,063 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:18:52,063 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:18:52,063 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 14:18:52,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:18:52,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:18:52,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:18:52,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:18:52,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:18:52,073 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-27 14:18:52,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1456327696] [2020-10-27 14:18:52,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:18:52,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 14:18:52,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84907403] [2020-10-27 14:18:52,076 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 14:18:52,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:18:52,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 14:18:52,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 14:18:52,080 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 6 states. [2020-10-27 14:18:52,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:18:52,259 INFO L93 Difference]: Finished difference Result 73 states and 82 transitions. [2020-10-27 14:18:52,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 14:18:52,261 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2020-10-27 14:18:52,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:18:52,262 INFO L225 Difference]: With dead ends: 73 [2020-10-27 14:18:52,262 INFO L226 Difference]: Without dead ends: 48 [2020-10-27 14:18:52,263 INFO L677 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 [2020-10-27 14:18:52,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-27 14:18:52,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 45. [2020-10-27 14:18:52,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-27 14:18:52,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2020-10-27 14:18:52,279 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 33 [2020-10-27 14:18:52,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:18:52,280 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2020-10-27 14:18:52,280 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 14:18:52,282 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2020-10-27 14:18:52,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 14:18:52,284 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:18:52,285 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 14:18:52,285 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 14:18:52,285 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:18:52,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:18:52,286 INFO L82 PathProgramCache]: Analyzing trace with hash -1899345224, now seen corresponding path program 3 times [2020-10-27 14:18:52,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:18:52,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1393301537] [2020-10-27 14:18:52,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:18:52,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:18:52,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:52,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:52,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:52,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:54,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:57,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:18:57,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 14:18:57,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 14:18:57,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 14:18:57,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:18:57,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 14:18:57,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-27 14:18:57,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 14:18:57,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:18:57,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:18:57,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:18:57,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:57,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:18:57,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:18:57,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:18:57,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:18:57,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:18:57,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:18:57,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:18:57,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:18:57,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:18:57,412 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-27 14:18:57,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1393301537] [2020-10-27 14:18:57,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:18:57,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 14:18:57,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114103842] [2020-10-27 14:18:57,413 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 14:18:57,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:18:57,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 14:18:57,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 14:18:57,415 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 7 states. [2020-10-27 14:18:57,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:18:57,571 INFO L93 Difference]: Finished difference Result 83 states and 92 transitions. [2020-10-27 14:18:57,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 14:18:57,572 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 39 [2020-10-27 14:18:57,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:18:57,573 INFO L225 Difference]: With dead ends: 83 [2020-10-27 14:18:57,573 INFO L226 Difference]: Without dead ends: 54 [2020-10-27 14:18:57,574 INFO L677 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 [2020-10-27 14:18:57,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-27 14:18:57,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 51. [2020-10-27 14:18:57,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-27 14:18:57,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2020-10-27 14:18:57,582 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 39 [2020-10-27 14:18:57,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:18:57,582 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2020-10-27 14:18:57,582 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 14:18:57,583 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2020-10-27 14:18:57,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 14:18:57,584 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:18:57,584 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:18:57,584 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 14:18:57,584 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:18:57,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:18:57,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1337493330, now seen corresponding path program 4 times [2020-10-27 14:18:57,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:18:57,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1330273725] [2020-10-27 14:18:57,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:18:57,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:18:57,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:57,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:57,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:18:57,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:02,597 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:02,597 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 14:19:02,597 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:19:02,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 14:19:02,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:02,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 14:19:02,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-27 14:19:02,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 14:19:02,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:02,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:19:02,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:02,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:02,734 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:02,735 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:19:02,735 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:19:02,735 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 14:19:02,735 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:02,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:19:02,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:19:02,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:19:02,736 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:02,743 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-10-27 14:19:02,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1330273725] [2020-10-27 14:19:02,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:19:02,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 14:19:02,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85158368] [2020-10-27 14:19:02,745 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 14:19:02,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:19:02,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 14:19:02,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 14:19:02,747 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand 8 states. [2020-10-27 14:19:02,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:19:02,945 INFO L93 Difference]: Finished difference Result 93 states and 102 transitions. [2020-10-27 14:19:02,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 14:19:02,945 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 45 [2020-10-27 14:19:02,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:19:02,947 INFO L225 Difference]: With dead ends: 93 [2020-10-27 14:19:02,947 INFO L226 Difference]: Without dead ends: 60 [2020-10-27 14:19:02,950 INFO L677 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 [2020-10-27 14:19:02,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-27 14:19:02,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 57. [2020-10-27 14:19:02,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-27 14:19:02,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2020-10-27 14:19:02,967 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 45 [2020-10-27 14:19:02,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:19:02,967 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2020-10-27 14:19:02,967 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 14:19:02,967 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2020-10-27 14:19:02,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-27 14:19:02,972 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:19:02,972 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:19:02,973 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 14:19:02,973 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:19:02,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:19:02,974 INFO L82 PathProgramCache]: Analyzing trace with hash -1340266388, now seen corresponding path program 5 times [2020-10-27 14:19:02,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:19:02,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [52449909] [2020-10-27 14:19:02,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:19:02,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:03,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:03,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:03,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:03,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:08,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:08,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 14:19:08,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:19:08,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-27 14:19:08,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:08,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 14:19:08,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-27 14:19:08,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 14:19:08,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:08,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:19:08,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:08,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:08,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:08,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:19:08,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:19:08,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:19:08,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:08,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:19:08,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:19:08,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:19:08,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:08,126 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-10-27 14:19:08,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [52449909] [2020-10-27 14:19:08,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:19:08,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 14:19:08,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017648370] [2020-10-27 14:19:08,129 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 14:19:08,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:19:08,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 14:19:08,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 14:19:08,131 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand 9 states. [2020-10-27 14:19:08,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:19:08,329 INFO L93 Difference]: Finished difference Result 103 states and 112 transitions. [2020-10-27 14:19:08,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 14:19:08,330 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 51 [2020-10-27 14:19:08,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:19:08,331 INFO L225 Difference]: With dead ends: 103 [2020-10-27 14:19:08,332 INFO L226 Difference]: Without dead ends: 66 [2020-10-27 14:19:08,334 INFO L677 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 [2020-10-27 14:19:08,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-27 14:19:08,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 63. [2020-10-27 14:19:08,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-27 14:19:08,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 67 transitions. [2020-10-27 14:19:08,347 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 67 transitions. Word has length 51 [2020-10-27 14:19:08,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:19:08,347 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 67 transitions. [2020-10-27 14:19:08,347 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 14:19:08,348 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 67 transitions. [2020-10-27 14:19:08,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 14:19:08,352 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:19:08,352 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:19:08,352 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 14:19:08,352 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:19:08,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:19:08,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1445802490, now seen corresponding path program 6 times [2020-10-27 14:19:08,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:19:08,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2005489429] [2020-10-27 14:19:08,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:19:08,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:08,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:08,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:08,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:08,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:13,383 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:13,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-27 14:19:13,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:19:13,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 14:19:13,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:13,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 14:19:13,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-27 14:19:13,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 14:19:13,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:13,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:19:13,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:13,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:13,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:13,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:19:13,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:19:13,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 14:19:13,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:13,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:19:13,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:19:13,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:19:13,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:13,515 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-10-27 14:19:13,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2005489429] [2020-10-27 14:19:13,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:19:13,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 14:19:13,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537586383] [2020-10-27 14:19:13,519 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 14:19:13,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:19:13,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 14:19:13,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-27 14:19:13,521 INFO L87 Difference]: Start difference. First operand 63 states and 67 transitions. Second operand 10 states. [2020-10-27 14:19:13,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:19:13,748 INFO L93 Difference]: Finished difference Result 113 states and 122 transitions. [2020-10-27 14:19:13,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 14:19:13,749 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 57 [2020-10-27 14:19:13,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:19:13,751 INFO L225 Difference]: With dead ends: 113 [2020-10-27 14:19:13,751 INFO L226 Difference]: Without dead ends: 72 [2020-10-27 14:19:13,753 INFO L677 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 [2020-10-27 14:19:13,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-27 14:19:13,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 69. [2020-10-27 14:19:13,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-27 14:19:13,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 73 transitions. [2020-10-27 14:19:13,766 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 73 transitions. Word has length 57 [2020-10-27 14:19:13,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:19:13,766 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 73 transitions. [2020-10-27 14:19:13,766 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 14:19:13,766 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 73 transitions. [2020-10-27 14:19:13,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-27 14:19:13,770 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:19:13,770 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:19:13,770 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 14:19:13,771 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:19:13,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:19:13,773 INFO L82 PathProgramCache]: Analyzing trace with hash -432269280, now seen corresponding path program 7 times [2020-10-27 14:19:13,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:19:13,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [779145208] [2020-10-27 14:19:13,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:19:13,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:13,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:13,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:13,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:16,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:18,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:18,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 14:19:18,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:19:18,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-27 14:19:18,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:18,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 14:19:18,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-27 14:19:18,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 14:19:18,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:18,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:19:18,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:18,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:18,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:18,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:19:18,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:19:18,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:19:18,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:18,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:19:18,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:19:18,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:19:18,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:18,973 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2020-10-27 14:19:18,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [779145208] [2020-10-27 14:19:18,974 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:19:18,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 14:19:18,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892867739] [2020-10-27 14:19:18,975 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 14:19:18,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:19:18,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 14:19:18,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-27 14:19:18,978 INFO L87 Difference]: Start difference. First operand 69 states and 73 transitions. Second operand 11 states. [2020-10-27 14:19:19,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:19:19,158 INFO L93 Difference]: Finished difference Result 123 states and 132 transitions. [2020-10-27 14:19:19,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 14:19:19,159 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 63 [2020-10-27 14:19:19,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:19:19,162 INFO L225 Difference]: With dead ends: 123 [2020-10-27 14:19:19,162 INFO L226 Difference]: Without dead ends: 78 [2020-10-27 14:19:19,163 INFO L677 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 [2020-10-27 14:19:19,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-27 14:19:19,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 75. [2020-10-27 14:19:19,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-27 14:19:19,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 79 transitions. [2020-10-27 14:19:19,180 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 79 transitions. Word has length 63 [2020-10-27 14:19:19,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:19:19,182 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 79 transitions. [2020-10-27 14:19:19,182 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 14:19:19,182 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 79 transitions. [2020-10-27 14:19:19,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-27 14:19:19,184 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:19:19,185 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:19:19,185 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 14:19:19,186 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:19:19,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:19:19,187 INFO L82 PathProgramCache]: Analyzing trace with hash 2017699514, now seen corresponding path program 8 times [2020-10-27 14:19:19,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:19:19,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1713679338] [2020-10-27 14:19:19,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:19:19,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:19,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:19,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:19,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:22,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:24,208 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:24,208 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-27 14:19:24,208 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:19:24,208 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 14:19:24,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:24,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 14:19:24,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-27 14:19:24,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 14:19:24,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:24,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:19:24,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:24,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:24,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:24,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:19:24,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:19:24,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:19:24,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:24,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:19:24,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:19:24,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:19:24,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:24,405 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2020-10-27 14:19:24,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1713679338] [2020-10-27 14:19:24,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:19:24,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 14:19:24,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700542214] [2020-10-27 14:19:24,407 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 14:19:24,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:19:24,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 14:19:24,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:19:24,409 INFO L87 Difference]: Start difference. First operand 75 states and 79 transitions. Second operand 12 states. [2020-10-27 14:19:24,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:19:24,714 INFO L93 Difference]: Finished difference Result 133 states and 142 transitions. [2020-10-27 14:19:24,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 14:19:24,715 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 69 [2020-10-27 14:19:24,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:19:24,716 INFO L225 Difference]: With dead ends: 133 [2020-10-27 14:19:24,717 INFO L226 Difference]: Without dead ends: 84 [2020-10-27 14:19:24,717 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:19:24,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-27 14:19:24,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 81. [2020-10-27 14:19:24,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-27 14:19:24,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 85 transitions. [2020-10-27 14:19:24,726 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 85 transitions. Word has length 69 [2020-10-27 14:19:24,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:19:24,727 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 85 transitions. [2020-10-27 14:19:24,727 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 14:19:24,727 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 85 transitions. [2020-10-27 14:19:24,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-27 14:19:24,728 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:19:24,729 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:19:24,729 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 14:19:24,729 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:19:24,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:19:24,730 INFO L82 PathProgramCache]: Analyzing trace with hash 375134676, now seen corresponding path program 9 times [2020-10-27 14:19:24,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:19:24,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1109012827] [2020-10-27 14:19:24,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:19:24,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:24,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:24,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:24,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:28,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:29,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:29,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-27 14:19:29,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:19:29,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-27 14:19:29,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:29,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 14:19:29,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-27 14:19:29,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 14:19:29,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:29,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:19:29,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:29,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:29,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:29,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:19:29,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:19:29,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:19:29,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:29,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:19:29,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:19:29,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:19:29,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:29,946 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2020-10-27 14:19:29,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1109012827] [2020-10-27 14:19:29,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:19:29,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 14:19:29,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629647] [2020-10-27 14:19:29,951 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 14:19:29,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:19:29,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 14:19:29,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-27 14:19:29,953 INFO L87 Difference]: Start difference. First operand 81 states and 85 transitions. Second operand 13 states. [2020-10-27 14:19:30,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:19:30,438 INFO L93 Difference]: Finished difference Result 143 states and 152 transitions. [2020-10-27 14:19:30,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 14:19:30,439 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 75 [2020-10-27 14:19:30,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:19:30,440 INFO L225 Difference]: With dead ends: 143 [2020-10-27 14:19:30,440 INFO L226 Difference]: Without dead ends: 90 [2020-10-27 14:19:30,441 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-27 14:19:30,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-27 14:19:30,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 87. [2020-10-27 14:19:30,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-27 14:19:30,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 91 transitions. [2020-10-27 14:19:30,452 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 91 transitions. Word has length 75 [2020-10-27 14:19:30,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:19:30,454 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 91 transitions. [2020-10-27 14:19:30,454 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 14:19:30,455 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 91 transitions. [2020-10-27 14:19:30,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-27 14:19:30,456 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:19:30,457 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:19:30,457 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 14:19:30,457 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:19:30,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:19:30,458 INFO L82 PathProgramCache]: Analyzing trace with hash -729804434, now seen corresponding path program 10 times [2020-10-27 14:19:30,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:19:30,458 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1266651913] [2020-10-27 14:19:30,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:19:30,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:30,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:30,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:30,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:35,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:35,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:35,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-27 14:19:35,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:19:35,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-27 14:19:35,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:35,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 14:19:35,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 57 [2020-10-27 14:19:35,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 14:19:35,486 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:35,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:19:35,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:35,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:35,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:35,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:19:35,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:19:35,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:19:35,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:35,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:19:35,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:19:35,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:19:35,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:19:35,705 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2020-10-27 14:19:35,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1266651913] [2020-10-27 14:19:35,705 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:19:35,705 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 14:19:35,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334358034] [2020-10-27 14:19:35,706 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 14:19:35,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:19:35,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 14:19:35,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:19:35,708 INFO L87 Difference]: Start difference. First operand 87 states and 91 transitions. Second operand 14 states. [2020-10-27 14:19:36,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:19:36,058 INFO L93 Difference]: Finished difference Result 153 states and 162 transitions. [2020-10-27 14:19:36,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 14:19:36,059 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 81 [2020-10-27 14:19:36,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:19:36,060 INFO L225 Difference]: With dead ends: 153 [2020-10-27 14:19:36,061 INFO L226 Difference]: Without dead ends: 96 [2020-10-27 14:19:36,062 INFO L677 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 [2020-10-27 14:19:36,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-27 14:19:36,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 93. [2020-10-27 14:19:36,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-27 14:19:36,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 97 transitions. [2020-10-27 14:19:36,068 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 97 transitions. Word has length 81 [2020-10-27 14:19:36,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:19:36,069 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 97 transitions. [2020-10-27 14:19:36,069 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 14:19:36,069 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 97 transitions. [2020-10-27 14:19:36,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-27 14:19:36,070 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:19:36,070 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:19:36,070 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 14:19:36,070 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:19:36,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:19:36,071 INFO L82 PathProgramCache]: Analyzing trace with hash 1580346760, now seen corresponding path program 11 times [2020-10-27 14:19:36,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:19:36,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1969997267] [2020-10-27 14:19:36,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:19:36,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:36,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:36,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:36,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:40,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:41,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:41,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-27 14:19:41,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:19:41,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 14:19:41,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:41,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 14:19:41,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-10-27 14:19:41,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 14:19:41,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:41,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:19:41,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:41,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:41,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:41,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:19:41,285 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:19:41,285 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:19:41,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:41,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:19:41,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:19:41,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:19:41,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:41,296 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2020-10-27 14:19:41,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1969997267] [2020-10-27 14:19:41,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:19:41,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 14:19:41,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040789030] [2020-10-27 14:19:41,298 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 14:19:41,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:19:41,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 14:19:41,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-27 14:19:41,299 INFO L87 Difference]: Start difference. First operand 93 states and 97 transitions. Second operand 15 states. [2020-10-27 14:19:41,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:19:41,618 INFO L93 Difference]: Finished difference Result 163 states and 172 transitions. [2020-10-27 14:19:41,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 14:19:41,619 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 87 [2020-10-27 14:19:41,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:19:41,620 INFO L225 Difference]: With dead ends: 163 [2020-10-27 14:19:41,620 INFO L226 Difference]: Without dead ends: 102 [2020-10-27 14:19:41,622 INFO L677 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 [2020-10-27 14:19:41,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-27 14:19:41,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 99. [2020-10-27 14:19:41,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-27 14:19:41,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 103 transitions. [2020-10-27 14:19:41,635 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 103 transitions. Word has length 87 [2020-10-27 14:19:41,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:19:41,635 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 103 transitions. [2020-10-27 14:19:41,635 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 14:19:41,636 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 103 transitions. [2020-10-27 14:19:41,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-27 14:19:41,636 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:19:41,637 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:19:41,637 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 14:19:41,637 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:19:41,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:19:41,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1333981662, now seen corresponding path program 12 times [2020-10-27 14:19:41,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:19:41,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1785541238] [2020-10-27 14:19:41,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:19:41,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:41,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:41,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:41,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:46,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:46,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-27 14:19:46,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:19:46,684 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5034 [2020-10-27 14:19:46,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:46,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 14:19:46,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-27 14:19:46,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 14:19:46,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:46,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:19:46,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:46,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:46,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:46,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:19:46,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:19:46,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:19:46,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:46,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:19:46,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:19:46,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:19:46,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:46,917 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2020-10-27 14:19:46,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1785541238] [2020-10-27 14:19:46,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:19:46,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 14:19:46,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009133840] [2020-10-27 14:19:46,918 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 14:19:46,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:19:46,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 14:19:46,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:19:46,921 INFO L87 Difference]: Start difference. First operand 99 states and 103 transitions. Second operand 16 states. [2020-10-27 14:19:47,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:19:47,288 INFO L93 Difference]: Finished difference Result 173 states and 182 transitions. [2020-10-27 14:19:47,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 14:19:47,289 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 93 [2020-10-27 14:19:47,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:19:47,290 INFO L225 Difference]: With dead ends: 173 [2020-10-27 14:19:47,290 INFO L226 Difference]: Without dead ends: 108 [2020-10-27 14:19:47,292 INFO L677 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 [2020-10-27 14:19:47,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-27 14:19:47,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 105. [2020-10-27 14:19:47,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-27 14:19:47,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 109 transitions. [2020-10-27 14:19:47,300 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 109 transitions. Word has length 93 [2020-10-27 14:19:47,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:19:47,300 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 109 transitions. [2020-10-27 14:19:47,300 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 14:19:47,301 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 109 transitions. [2020-10-27 14:19:47,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-27 14:19:47,304 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:19:47,305 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:19:47,305 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 14:19:47,305 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:19:47,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:19:47,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1408455484, now seen corresponding path program 13 times [2020-10-27 14:19:47,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:19:47,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [597902562] [2020-10-27 14:19:47,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:19:47,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:47,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:47,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:47,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:52,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:52,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-27 14:19:52,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:19:52,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-27 14:19:52,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:52,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 14:19:52,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-27 14:19:52,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 14:19:52,331 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:52,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:19:52,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:52,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:52,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:52,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:19:52,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:19:52,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:19:52,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:52,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:19:52,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:19:52,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:19:52,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:52,568 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-10-27 14:19:52,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [597902562] [2020-10-27 14:19:52,569 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:19:52,569 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 14:19:52,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517209139] [2020-10-27 14:19:52,570 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 14:19:52,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:19:52,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 14:19:52,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-27 14:19:52,571 INFO L87 Difference]: Start difference. First operand 105 states and 109 transitions. Second operand 17 states. [2020-10-27 14:19:52,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:19:52,840 INFO L93 Difference]: Finished difference Result 183 states and 192 transitions. [2020-10-27 14:19:52,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 14:19:52,841 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 99 [2020-10-27 14:19:52,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:19:52,842 INFO L225 Difference]: With dead ends: 183 [2020-10-27 14:19:52,842 INFO L226 Difference]: Without dead ends: 114 [2020-10-27 14:19:52,843 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-27 14:19:52,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-27 14:19:52,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 111. [2020-10-27 14:19:52,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-27 14:19:52,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 115 transitions. [2020-10-27 14:19:52,849 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 115 transitions. Word has length 99 [2020-10-27 14:19:52,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:19:52,850 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 115 transitions. [2020-10-27 14:19:52,850 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 14:19:52,850 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 115 transitions. [2020-10-27 14:19:52,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-27 14:19:52,851 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:19:52,851 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:19:52,851 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 14:19:52,851 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:19:52,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:19:52,852 INFO L82 PathProgramCache]: Analyzing trace with hash 380607702, now seen corresponding path program 14 times [2020-10-27 14:19:52,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:19:52,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1069142211] [2020-10-27 14:19:52,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:19:52,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:52,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:52,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:52,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:57,889 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:57,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-27 14:19:57,890 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:19:57,890 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-27 14:19:57,890 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:57,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 14:19:57,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-27 14:19:57,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 14:19:57,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:58,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:19:58,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:58,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:58,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:19:58,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:19:58,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:19:58,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:19:58,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:19:58,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:19:58,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:19:58,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:19:58,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:19:58,180 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-10-27 14:19:58,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1069142211] [2020-10-27 14:19:58,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:19:58,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 14:19:58,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205671419] [2020-10-27 14:19:58,182 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 14:19:58,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:19:58,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 14:19:58,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-27 14:19:58,183 INFO L87 Difference]: Start difference. First operand 111 states and 115 transitions. Second operand 18 states. [2020-10-27 14:19:58,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:19:58,536 INFO L93 Difference]: Finished difference Result 193 states and 202 transitions. [2020-10-27 14:19:58,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 14:19:58,537 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 105 [2020-10-27 14:19:58,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:19:58,538 INFO L225 Difference]: With dead ends: 193 [2020-10-27 14:19:58,538 INFO L226 Difference]: Without dead ends: 120 [2020-10-27 14:19:58,539 INFO L677 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 [2020-10-27 14:19:58,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-27 14:19:58,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 117. [2020-10-27 14:19:58,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-27 14:19:58,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 121 transitions. [2020-10-27 14:19:58,545 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 121 transitions. Word has length 105 [2020-10-27 14:19:58,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:19:58,545 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 121 transitions. [2020-10-27 14:19:58,545 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 14:19:58,545 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 121 transitions. [2020-10-27 14:19:58,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-27 14:19:58,546 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:19:58,546 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:19:58,547 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 14:19:58,547 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:19:58,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:19:58,547 INFO L82 PathProgramCache]: Analyzing trace with hash 1179945712, now seen corresponding path program 15 times [2020-10-27 14:19:58,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:19:58,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [385171258] [2020-10-27 14:19:58,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:19:58,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:19:58,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:58,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:19:58,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:03,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:03,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-27 14:20:03,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:20:03,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5054 [2020-10-27 14:20:03,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:03,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 14:20:03,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-27 14:20:03,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 14:20:03,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:03,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:20:03,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:03,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:03,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:03,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:20:03,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:20:03,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:20:03,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:03,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:20:03,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:20:03,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:20:03,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:03,911 INFO L134 CoverageAnalysis]: Checked inductivity of 675 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2020-10-27 14:20:03,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [385171258] [2020-10-27 14:20:03,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:20:03,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 14:20:03,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279037284] [2020-10-27 14:20:03,913 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 14:20:03,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:20:03,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 14:20:03,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-27 14:20:03,914 INFO L87 Difference]: Start difference. First operand 117 states and 121 transitions. Second operand 19 states. [2020-10-27 14:20:04,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:20:04,319 INFO L93 Difference]: Finished difference Result 203 states and 212 transitions. [2020-10-27 14:20:04,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 14:20:04,319 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 111 [2020-10-27 14:20:04,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:20:04,320 INFO L225 Difference]: With dead ends: 203 [2020-10-27 14:20:04,320 INFO L226 Difference]: Without dead ends: 126 [2020-10-27 14:20:04,321 INFO L677 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 [2020-10-27 14:20:04,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-27 14:20:04,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 123. [2020-10-27 14:20:04,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-27 14:20:04,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 127 transitions. [2020-10-27 14:20:04,328 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 127 transitions. Word has length 111 [2020-10-27 14:20:04,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:20:04,328 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 127 transitions. [2020-10-27 14:20:04,328 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 14:20:04,328 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 127 transitions. [2020-10-27 14:20:04,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-27 14:20:04,330 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:20:04,330 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:20:04,330 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 14:20:04,330 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:20:04,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:20:04,331 INFO L82 PathProgramCache]: Analyzing trace with hash 1779219850, now seen corresponding path program 16 times [2020-10-27 14:20:04,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:20:04,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1955346844] [2020-10-27 14:20:04,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:20:04,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:04,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:04,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:04,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:09,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:09,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-27 14:20:09,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:20:09,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5101 [2020-10-27 14:20:09,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:09,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 14:20:09,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-27 14:20:09,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 14:20:09,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:09,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:20:09,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:09,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:09,750 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:09,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:20:09,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:20:09,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:20:09,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:09,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:20:09,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:20:09,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:20:09,751 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:09,761 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 512 trivial. 0 not checked. [2020-10-27 14:20:09,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1955346844] [2020-10-27 14:20:09,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:20:09,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 14:20:09,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905687173] [2020-10-27 14:20:09,762 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 14:20:09,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:20:09,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 14:20:09,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:20:09,764 INFO L87 Difference]: Start difference. First operand 123 states and 127 transitions. Second operand 20 states. [2020-10-27 14:20:10,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:20:10,138 INFO L93 Difference]: Finished difference Result 213 states and 222 transitions. [2020-10-27 14:20:10,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 14:20:10,138 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 117 [2020-10-27 14:20:10,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:20:10,140 INFO L225 Difference]: With dead ends: 213 [2020-10-27 14:20:10,140 INFO L226 Difference]: Without dead ends: 132 [2020-10-27 14:20:10,140 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:20:10,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-27 14:20:10,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 129. [2020-10-27 14:20:10,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-27 14:20:10,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 133 transitions. [2020-10-27 14:20:10,147 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 133 transitions. Word has length 117 [2020-10-27 14:20:10,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:20:10,147 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 133 transitions. [2020-10-27 14:20:10,148 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 14:20:10,148 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 133 transitions. [2020-10-27 14:20:10,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-27 14:20:10,149 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:20:10,149 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:20:10,149 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 14:20:10,149 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:20:10,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:20:10,150 INFO L82 PathProgramCache]: Analyzing trace with hash 2089473188, now seen corresponding path program 17 times [2020-10-27 14:20:10,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:20:10,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [528375123] [2020-10-27 14:20:10,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:20:10,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:10,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:10,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:10,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:15,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:15,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 133 [2020-10-27 14:20:15,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:20:15,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-27 14:20:15,186 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:15,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 14:20:15,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-27 14:20:15,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 14:20:15,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:15,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:20:15,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:15,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:15,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:15,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:20:15,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:20:15,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:20:15,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:15,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:20:15,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:20:15,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:20:15,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:15,533 INFO L134 CoverageAnalysis]: Checked inductivity of 867 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 578 trivial. 0 not checked. [2020-10-27 14:20:15,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [528375123] [2020-10-27 14:20:15,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:20:15,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 14:20:15,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406347900] [2020-10-27 14:20:15,534 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 14:20:15,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:20:15,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 14:20:15,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-27 14:20:15,536 INFO L87 Difference]: Start difference. First operand 129 states and 133 transitions. Second operand 21 states. [2020-10-27 14:20:15,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:20:15,980 INFO L93 Difference]: Finished difference Result 223 states and 232 transitions. [2020-10-27 14:20:15,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 14:20:15,981 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 123 [2020-10-27 14:20:15,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:20:15,982 INFO L225 Difference]: With dead ends: 223 [2020-10-27 14:20:15,982 INFO L226 Difference]: Without dead ends: 138 [2020-10-27 14:20:15,984 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-27 14:20:15,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-27 14:20:15,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 135. [2020-10-27 14:20:15,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-27 14:20:15,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 139 transitions. [2020-10-27 14:20:15,994 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 139 transitions. Word has length 123 [2020-10-27 14:20:15,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:20:15,994 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 139 transitions. [2020-10-27 14:20:15,994 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 14:20:15,994 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 139 transitions. [2020-10-27 14:20:15,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-10-27 14:20:15,998 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:20:15,998 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:20:15,999 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 14:20:15,999 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:20:15,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:20:15,999 INFO L82 PathProgramCache]: Analyzing trace with hash -1509330882, now seen corresponding path program 18 times [2020-10-27 14:20:16,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:20:16,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1536379265] [2020-10-27 14:20:16,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:20:16,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:16,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:16,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:16,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:21,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:21,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 139 [2020-10-27 14:20:21,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:20:21,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 14:20:21,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:21,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 14:20:21,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-27 14:20:21,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 14:20:21,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:21,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:20:21,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:21,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:21,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:21,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:20:21,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:20:21,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:20:21,390 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:21,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:20:21,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:20:21,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:20:21,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:21,401 INFO L134 CoverageAnalysis]: Checked inductivity of 972 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2020-10-27 14:20:21,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1536379265] [2020-10-27 14:20:21,402 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:20:21,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 14:20:21,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529696955] [2020-10-27 14:20:21,402 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 14:20:21,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:20:21,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 14:20:21,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-27 14:20:21,404 INFO L87 Difference]: Start difference. First operand 135 states and 139 transitions. Second operand 22 states. [2020-10-27 14:20:21,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:20:21,856 INFO L93 Difference]: Finished difference Result 233 states and 242 transitions. [2020-10-27 14:20:21,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 14:20:21,856 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 129 [2020-10-27 14:20:21,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:20:21,858 INFO L225 Difference]: With dead ends: 233 [2020-10-27 14:20:21,858 INFO L226 Difference]: Without dead ends: 144 [2020-10-27 14:20:21,859 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-27 14:20:21,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-27 14:20:21,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 141. [2020-10-27 14:20:21,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-27 14:20:21,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 145 transitions. [2020-10-27 14:20:21,866 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 145 transitions. Word has length 129 [2020-10-27 14:20:21,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:20:21,866 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 145 transitions. [2020-10-27 14:20:21,866 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 14:20:21,867 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 145 transitions. [2020-10-27 14:20:21,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-10-27 14:20:21,868 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:20:21,868 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:20:21,868 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 14:20:21,868 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:20:21,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:20:21,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1984639064, now seen corresponding path program 19 times [2020-10-27 14:20:21,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:20:21,869 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [83790065] [2020-10-27 14:20:21,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:20:21,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:21,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:21,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:21,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:26,933 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:26,934 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 145 [2020-10-27 14:20:26,934 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:20:26,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5053 [2020-10-27 14:20:26,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:26,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 14:20:26,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-27 14:20:26,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 14:20:26,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:27,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:20:27,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:27,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:27,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:27,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:20:27,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:20:27,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:20:27,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:27,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:20:27,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:20:27,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:20:27,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:27,343 INFO L134 CoverageAnalysis]: Checked inductivity of 1083 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 722 trivial. 0 not checked. [2020-10-27 14:20:27,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [83790065] [2020-10-27 14:20:27,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:20:27,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 14:20:27,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421456406] [2020-10-27 14:20:27,344 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 14:20:27,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:20:27,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 14:20:27,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-27 14:20:27,345 INFO L87 Difference]: Start difference. First operand 141 states and 145 transitions. Second operand 23 states. [2020-10-27 14:20:27,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:20:27,867 INFO L93 Difference]: Finished difference Result 243 states and 252 transitions. [2020-10-27 14:20:27,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 14:20:27,868 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 135 [2020-10-27 14:20:27,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:20:27,869 INFO L225 Difference]: With dead ends: 243 [2020-10-27 14:20:27,870 INFO L226 Difference]: Without dead ends: 150 [2020-10-27 14:20:27,871 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-27 14:20:27,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-27 14:20:27,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 147. [2020-10-27 14:20:27,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-27 14:20:27,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 151 transitions. [2020-10-27 14:20:27,878 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 151 transitions. Word has length 135 [2020-10-27 14:20:27,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:20:27,878 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 151 transitions. [2020-10-27 14:20:27,878 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 14:20:27,878 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 151 transitions. [2020-10-27 14:20:27,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-10-27 14:20:27,880 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:20:27,880 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:20:27,880 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 14:20:27,880 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:20:27,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:20:27,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1634028302, now seen corresponding path program 20 times [2020-10-27 14:20:27,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:20:27,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [381376302] [2020-10-27 14:20:27,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:20:27,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:27,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:27,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:27,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:32,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:32,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 151 [2020-10-27 14:20:32,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:20:32,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 14:20:32,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:32,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 14:20:32,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-10-27 14:20:32,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 14:20:32,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:33,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:20:33,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:33,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:33,313 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:33,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:20:33,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:20:33,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:20:33,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:33,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:20:33,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:20:33,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:20:33,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:33,334 INFO L134 CoverageAnalysis]: Checked inductivity of 1200 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 800 trivial. 0 not checked. [2020-10-27 14:20:33,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [381376302] [2020-10-27 14:20:33,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:20:33,336 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 14:20:33,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576713760] [2020-10-27 14:20:33,337 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 14:20:33,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:20:33,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 14:20:33,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-27 14:20:33,339 INFO L87 Difference]: Start difference. First operand 147 states and 151 transitions. Second operand 24 states. [2020-10-27 14:20:33,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:20:33,855 INFO L93 Difference]: Finished difference Result 253 states and 262 transitions. [2020-10-27 14:20:33,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 14:20:33,860 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 141 [2020-10-27 14:20:33,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:20:33,862 INFO L225 Difference]: With dead ends: 253 [2020-10-27 14:20:33,862 INFO L226 Difference]: Without dead ends: 156 [2020-10-27 14:20:33,863 INFO L677 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 [2020-10-27 14:20:33,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-10-27 14:20:33,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 153. [2020-10-27 14:20:33,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-10-27 14:20:33,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 157 transitions. [2020-10-27 14:20:33,877 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 157 transitions. Word has length 141 [2020-10-27 14:20:33,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:20:33,877 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 157 transitions. [2020-10-27 14:20:33,877 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 14:20:33,877 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 157 transitions. [2020-10-27 14:20:33,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-10-27 14:20:33,879 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:20:33,879 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:20:33,879 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 14:20:33,880 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:20:33,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:20:33,880 INFO L82 PathProgramCache]: Analyzing trace with hash 734699020, now seen corresponding path program 21 times [2020-10-27 14:20:33,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:20:33,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1670775914] [2020-10-27 14:20:33,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:20:33,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:33,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:33,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:33,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:38,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:38,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 157 [2020-10-27 14:20:38,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:20:38,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5073 [2020-10-27 14:20:38,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:38,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 14:20:38,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 57 [2020-10-27 14:20:38,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 14:20:38,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:39,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:20:39,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:39,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:39,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:39,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:20:39,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:20:39,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:20:39,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:39,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:20:39,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:20:39,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:20:39,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:39,450 INFO L134 CoverageAnalysis]: Checked inductivity of 1323 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 882 trivial. 0 not checked. [2020-10-27 14:20:39,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1670775914] [2020-10-27 14:20:39,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:20:39,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 14:20:39,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599609845] [2020-10-27 14:20:39,451 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 14:20:39,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:20:39,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 14:20:39,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-27 14:20:39,453 INFO L87 Difference]: Start difference. First operand 153 states and 157 transitions. Second operand 25 states. [2020-10-27 14:20:39,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:20:39,927 INFO L93 Difference]: Finished difference Result 263 states and 272 transitions. [2020-10-27 14:20:39,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 14:20:39,931 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 147 [2020-10-27 14:20:39,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:20:39,932 INFO L225 Difference]: With dead ends: 263 [2020-10-27 14:20:39,932 INFO L226 Difference]: Without dead ends: 162 [2020-10-27 14:20:39,933 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-27 14:20:39,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-27 14:20:39,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 159. [2020-10-27 14:20:39,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-27 14:20:39,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 163 transitions. [2020-10-27 14:20:39,947 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 163 transitions. Word has length 147 [2020-10-27 14:20:39,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:20:39,949 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 163 transitions. [2020-10-27 14:20:39,949 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 14:20:39,949 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 163 transitions. [2020-10-27 14:20:39,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-10-27 14:20:39,951 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:20:39,951 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:20:39,951 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 14:20:39,951 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:20:39,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:20:39,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1077250982, now seen corresponding path program 22 times [2020-10-27 14:20:39,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:20:39,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [69311537] [2020-10-27 14:20:39,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:20:39,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:39,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:39,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:40,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:45,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:45,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 163 [2020-10-27 14:20:45,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:20:45,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5040 [2020-10-27 14:20:45,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:45,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 14:20:45,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 59 [2020-10-27 14:20:45,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-27 14:20:45,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:45,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:20:45,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:45,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:45,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:45,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:20:45,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:20:45,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:20:45,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:45,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:20:45,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:20:45,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:20:45,513 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:45,528 INFO L134 CoverageAnalysis]: Checked inductivity of 1452 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 968 trivial. 0 not checked. [2020-10-27 14:20:45,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [69311537] [2020-10-27 14:20:45,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:20:45,529 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-27 14:20:45,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843990287] [2020-10-27 14:20:45,529 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-27 14:20:45,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:20:45,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-27 14:20:45,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-27 14:20:45,531 INFO L87 Difference]: Start difference. First operand 159 states and 163 transitions. Second operand 26 states. [2020-10-27 14:20:46,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:20:46,101 INFO L93 Difference]: Finished difference Result 273 states and 282 transitions. [2020-10-27 14:20:46,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 14:20:46,101 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 153 [2020-10-27 14:20:46,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:20:46,103 INFO L225 Difference]: With dead ends: 273 [2020-10-27 14:20:46,103 INFO L226 Difference]: Without dead ends: 168 [2020-10-27 14:20:46,104 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-27 14:20:46,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-10-27 14:20:46,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 165. [2020-10-27 14:20:46,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-27 14:20:46,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 169 transitions. [2020-10-27 14:20:46,124 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 169 transitions. Word has length 153 [2020-10-27 14:20:46,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:20:46,124 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 169 transitions. [2020-10-27 14:20:46,124 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-27 14:20:46,124 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 169 transitions. [2020-10-27 14:20:46,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-10-27 14:20:46,129 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:20:46,129 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:20:46,129 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 14:20:46,129 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:20:46,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:20:46,130 INFO L82 PathProgramCache]: Analyzing trace with hash 1304305088, now seen corresponding path program 23 times [2020-10-27 14:20:46,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:20:46,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [923160726] [2020-10-27 14:20:46,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:20:46,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:46,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:46,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:46,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:51,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:51,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 169 [2020-10-27 14:20:51,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:20:51,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5112 [2020-10-27 14:20:51,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:51,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-27 14:20:51,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-10-27 14:20:51,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-27 14:20:51,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:51,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:20:51,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:51,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:51,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:51,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:20:51,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:20:51,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:20:51,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:51,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:20:51,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:20:51,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:20:51,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:51,790 INFO L134 CoverageAnalysis]: Checked inductivity of 1587 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 1058 trivial. 0 not checked. [2020-10-27 14:20:51,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [923160726] [2020-10-27 14:20:51,791 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:20:51,791 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-27 14:20:51,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564901827] [2020-10-27 14:20:51,792 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-27 14:20:51,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:20:51,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-27 14:20:51,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-27 14:20:51,793 INFO L87 Difference]: Start difference. First operand 165 states and 169 transitions. Second operand 27 states. [2020-10-27 14:20:52,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:20:52,386 INFO L93 Difference]: Finished difference Result 283 states and 292 transitions. [2020-10-27 14:20:52,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 14:20:52,386 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 159 [2020-10-27 14:20:52,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:20:52,388 INFO L225 Difference]: With dead ends: 283 [2020-10-27 14:20:52,388 INFO L226 Difference]: Without dead ends: 174 [2020-10-27 14:20:52,389 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-27 14:20:52,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-10-27 14:20:52,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 171. [2020-10-27 14:20:52,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-10-27 14:20:52,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 175 transitions. [2020-10-27 14:20:52,397 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 175 transitions. Word has length 159 [2020-10-27 14:20:52,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:20:52,397 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 175 transitions. [2020-10-27 14:20:52,397 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-27 14:20:52,397 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 175 transitions. [2020-10-27 14:20:52,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-10-27 14:20:52,399 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:20:52,399 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:20:52,400 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 14:20:52,400 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:20:52,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:20:52,400 INFO L82 PathProgramCache]: Analyzing trace with hash -808520614, now seen corresponding path program 24 times [2020-10-27 14:20:52,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:20:52,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1399257337] [2020-10-27 14:20:52,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:20:52,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:52,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:52,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:52,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:57,452 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:57,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 175 [2020-10-27 14:20:57,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:20:57,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5037 [2020-10-27 14:20:57,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:57,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 14:20:57,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 63 [2020-10-27 14:20:57,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 14:20:57,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:57,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:20:58,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:58,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:58,003 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:20:58,004 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:20:58,004 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:20:58,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:20:58,004 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:20:58,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:20:58,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:20:58,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:20:58,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:20:58,032 INFO L134 CoverageAnalysis]: Checked inductivity of 1728 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 1152 trivial. 0 not checked. [2020-10-27 14:20:58,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1399257337] [2020-10-27 14:20:58,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:20:58,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-27 14:20:58,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426938064] [2020-10-27 14:20:58,034 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-27 14:20:58,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:20:58,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-27 14:20:58,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-27 14:20:58,035 INFO L87 Difference]: Start difference. First operand 171 states and 175 transitions. Second operand 28 states. [2020-10-27 14:20:58,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:20:58,615 INFO L93 Difference]: Finished difference Result 293 states and 302 transitions. [2020-10-27 14:20:58,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 14:20:58,621 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 165 [2020-10-27 14:20:58,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:20:58,623 INFO L225 Difference]: With dead ends: 293 [2020-10-27 14:20:58,623 INFO L226 Difference]: Without dead ends: 180 [2020-10-27 14:20:58,624 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-27 14:20:58,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-27 14:20:58,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 177. [2020-10-27 14:20:58,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-10-27 14:20:58,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 181 transitions. [2020-10-27 14:20:58,631 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 181 transitions. Word has length 165 [2020-10-27 14:20:58,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:20:58,631 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 181 transitions. [2020-10-27 14:20:58,631 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-27 14:20:58,631 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 181 transitions. [2020-10-27 14:20:58,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-10-27 14:20:58,632 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:20:58,632 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:20:58,633 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 14:20:58,633 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:20:58,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:20:58,633 INFO L82 PathProgramCache]: Analyzing trace with hash -2057654412, now seen corresponding path program 25 times [2020-10-27 14:20:58,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:20:58,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1944875082] [2020-10-27 14:20:58,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:20:58,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:20:58,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:58,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:20:58,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:03,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:03,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 181 [2020-10-27 14:21:03,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:21:03,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5043 [2020-10-27 14:21:03,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:03,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-27 14:21:03,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 65 [2020-10-27 14:21:03,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-27 14:21:03,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:04,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:21:04,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:04,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:04,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:04,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:21:04,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:21:04,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:21:04,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:04,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:21:04,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:21:04,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:21:04,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:04,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1875 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 1250 trivial. 0 not checked. [2020-10-27 14:21:04,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1944875082] [2020-10-27 14:21:04,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:21:04,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-27 14:21:04,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74983331] [2020-10-27 14:21:04,334 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-27 14:21:04,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:21:04,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-27 14:21:04,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-27 14:21:04,335 INFO L87 Difference]: Start difference. First operand 177 states and 181 transitions. Second operand 29 states. [2020-10-27 14:21:04,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:21:04,829 INFO L93 Difference]: Finished difference Result 303 states and 312 transitions. [2020-10-27 14:21:04,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 14:21:04,830 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 171 [2020-10-27 14:21:04,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:21:04,831 INFO L225 Difference]: With dead ends: 303 [2020-10-27 14:21:04,831 INFO L226 Difference]: Without dead ends: 186 [2020-10-27 14:21:04,832 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-27 14:21:04,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-27 14:21:04,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 183. [2020-10-27 14:21:04,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-10-27 14:21:04,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 187 transitions. [2020-10-27 14:21:04,840 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 187 transitions. Word has length 171 [2020-10-27 14:21:04,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:21:04,840 INFO L481 AbstractCegarLoop]: Abstraction has 183 states and 187 transitions. [2020-10-27 14:21:04,840 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-27 14:21:04,840 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 187 transitions. [2020-10-27 14:21:04,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-10-27 14:21:04,841 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:21:04,841 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:21:04,842 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 14:21:04,842 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:21:04,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:21:04,845 INFO L82 PathProgramCache]: Analyzing trace with hash 719056654, now seen corresponding path program 26 times [2020-10-27 14:21:04,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:21:04,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1198285151] [2020-10-27 14:21:04,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:21:04,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:04,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:04,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:04,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:09,867 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:09,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 187 [2020-10-27 14:21:09,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:21:09,868 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-27 14:21:09,868 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:09,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-27 14:21:09,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 67 [2020-10-27 14:21:09,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-27 14:21:09,868 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:10,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:21:10,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:10,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:10,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:10,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:21:10,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:21:10,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:21:10,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:10,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:21:10,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:21:10,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:21:10,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:10,586 INFO L134 CoverageAnalysis]: Checked inductivity of 2028 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 1352 trivial. 0 not checked. [2020-10-27 14:21:10,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1198285151] [2020-10-27 14:21:10,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:21:10,587 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-27 14:21:10,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395813917] [2020-10-27 14:21:10,587 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-27 14:21:10,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:21:10,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-27 14:21:10,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-27 14:21:10,588 INFO L87 Difference]: Start difference. First operand 183 states and 187 transitions. Second operand 30 states. [2020-10-27 14:21:11,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:21:11,086 INFO L93 Difference]: Finished difference Result 313 states and 322 transitions. [2020-10-27 14:21:11,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-27 14:21:11,086 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 177 [2020-10-27 14:21:11,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:21:11,088 INFO L225 Difference]: With dead ends: 313 [2020-10-27 14:21:11,088 INFO L226 Difference]: Without dead ends: 192 [2020-10-27 14:21:11,089 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-27 14:21:11,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-27 14:21:11,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 189. [2020-10-27 14:21:11,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-10-27 14:21:11,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 193 transitions. [2020-10-27 14:21:11,097 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 193 transitions. Word has length 177 [2020-10-27 14:21:11,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:21:11,098 INFO L481 AbstractCegarLoop]: Abstraction has 189 states and 193 transitions. [2020-10-27 14:21:11,098 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-27 14:21:11,098 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 193 transitions. [2020-10-27 14:21:11,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2020-10-27 14:21:11,099 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:21:11,099 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:21:11,099 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 14:21:11,100 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:21:11,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:21:11,100 INFO L82 PathProgramCache]: Analyzing trace with hash -1269476568, now seen corresponding path program 27 times [2020-10-27 14:21:11,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:21:11,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [366292476] [2020-10-27 14:21:11,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:21:11,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:11,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:11,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:11,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:16,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:16,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 193 [2020-10-27 14:21:16,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:21:16,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5076 [2020-10-27 14:21:16,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:16,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-27 14:21:16,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 69 [2020-10-27 14:21:16,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-27 14:21:16,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:16,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:21:16,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:16,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:16,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:16,849 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:21:16,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:21:16,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:21:16,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:16,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:21:16,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:21:16,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:21:16,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:16,880 INFO L134 CoverageAnalysis]: Checked inductivity of 2187 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 1458 trivial. 0 not checked. [2020-10-27 14:21:16,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [366292476] [2020-10-27 14:21:16,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:21:16,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-27 14:21:16,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811716814] [2020-10-27 14:21:16,881 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-27 14:21:16,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:21:16,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-27 14:21:16,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-27 14:21:16,882 INFO L87 Difference]: Start difference. First operand 189 states and 193 transitions. Second operand 31 states. [2020-10-27 14:21:17,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:21:17,455 INFO L93 Difference]: Finished difference Result 323 states and 332 transitions. [2020-10-27 14:21:17,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 14:21:17,456 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 183 [2020-10-27 14:21:17,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:21:17,458 INFO L225 Difference]: With dead ends: 323 [2020-10-27 14:21:17,458 INFO L226 Difference]: Without dead ends: 198 [2020-10-27 14:21:17,460 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-27 14:21:17,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-10-27 14:21:17,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 195. [2020-10-27 14:21:17,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-10-27 14:21:17,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 199 transitions. [2020-10-27 14:21:17,467 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 199 transitions. Word has length 183 [2020-10-27 14:21:17,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:21:17,468 INFO L481 AbstractCegarLoop]: Abstraction has 195 states and 199 transitions. [2020-10-27 14:21:17,468 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-27 14:21:17,468 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 199 transitions. [2020-10-27 14:21:17,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-10-27 14:21:17,469 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:21:17,469 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:21:17,469 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 14:21:17,470 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:21:17,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:21:17,470 INFO L82 PathProgramCache]: Analyzing trace with hash 122780610, now seen corresponding path program 28 times [2020-10-27 14:21:17,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:21:17,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [141288639] [2020-10-27 14:21:17,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:21:17,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:17,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:17,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:17,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:22,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:22,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 199 [2020-10-27 14:21:22,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:21:22,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5157 [2020-10-27 14:21:22,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:22,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-27 14:21:22,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 71 [2020-10-27 14:21:22,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-27 14:21:22,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:23,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:21:23,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:23,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:23,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:23,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:21:23,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:21:23,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:21:23,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:23,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:21:23,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:21:23,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:21:23,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:23,453 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 1568 trivial. 0 not checked. [2020-10-27 14:21:23,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [141288639] [2020-10-27 14:21:23,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:21:23,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-27 14:21:23,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297703093] [2020-10-27 14:21:23,455 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-27 14:21:23,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:21:23,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-27 14:21:23,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-27 14:21:23,456 INFO L87 Difference]: Start difference. First operand 195 states and 199 transitions. Second operand 32 states. [2020-10-27 14:21:24,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:21:24,164 INFO L93 Difference]: Finished difference Result 333 states and 342 transitions. [2020-10-27 14:21:24,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 14:21:24,165 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 189 [2020-10-27 14:21:24,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:21:24,166 INFO L225 Difference]: With dead ends: 333 [2020-10-27 14:21:24,166 INFO L226 Difference]: Without dead ends: 204 [2020-10-27 14:21:24,169 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-27 14:21:24,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-10-27 14:21:24,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 201. [2020-10-27 14:21:24,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2020-10-27 14:21:24,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 205 transitions. [2020-10-27 14:21:24,180 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 205 transitions. Word has length 189 [2020-10-27 14:21:24,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:21:24,181 INFO L481 AbstractCegarLoop]: Abstraction has 201 states and 205 transitions. [2020-10-27 14:21:24,181 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-27 14:21:24,181 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 205 transitions. [2020-10-27 14:21:24,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-10-27 14:21:24,183 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:21:24,183 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:21:24,183 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 14:21:24,184 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:21:24,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:21:24,184 INFO L82 PathProgramCache]: Analyzing trace with hash 887294172, now seen corresponding path program 29 times [2020-10-27 14:21:24,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:21:24,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [530902533] [2020-10-27 14:21:24,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:21:24,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:24,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:24,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:24,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:29,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:29,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 205 [2020-10-27 14:21:29,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:21:29,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-27 14:21:29,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:29,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-27 14:21:29,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-27 14:21:29,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-27 14:21:29,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:30,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:21:30,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:30,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:30,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:30,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:21:30,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:21:30,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:21:30,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:30,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:21:30,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:21:30,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:21:30,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:30,042 INFO L134 CoverageAnalysis]: Checked inductivity of 2523 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 1682 trivial. 0 not checked. [2020-10-27 14:21:30,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [530902533] [2020-10-27 14:21:30,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:21:30,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-27 14:21:30,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333943195] [2020-10-27 14:21:30,044 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-27 14:21:30,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:21:30,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-27 14:21:30,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 14:21:30,045 INFO L87 Difference]: Start difference. First operand 201 states and 205 transitions. Second operand 33 states. [2020-10-27 14:21:30,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:21:30,780 INFO L93 Difference]: Finished difference Result 343 states and 352 transitions. [2020-10-27 14:21:30,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-27 14:21:30,780 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 195 [2020-10-27 14:21:30,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:21:30,782 INFO L225 Difference]: With dead ends: 343 [2020-10-27 14:21:30,783 INFO L226 Difference]: Without dead ends: 210 [2020-10-27 14:21:30,785 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 14:21:30,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-10-27 14:21:30,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 207. [2020-10-27 14:21:30,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-10-27 14:21:30,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 211 transitions. [2020-10-27 14:21:30,793 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 211 transitions. Word has length 195 [2020-10-27 14:21:30,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:21:30,793 INFO L481 AbstractCegarLoop]: Abstraction has 207 states and 211 transitions. [2020-10-27 14:21:30,793 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-27 14:21:30,793 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 211 transitions. [2020-10-27 14:21:30,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-10-27 14:21:30,794 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:21:30,795 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:21:30,795 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 14:21:30,795 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:21:30,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:21:30,795 INFO L82 PathProgramCache]: Analyzing trace with hash 866425462, now seen corresponding path program 30 times [2020-10-27 14:21:30,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:21:30,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1578458447] [2020-10-27 14:21:30,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:21:30,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:30,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:30,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:30,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:35,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:35,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 211 [2020-10-27 14:21:35,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:21:35,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-27 14:21:35,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:35,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-27 14:21:35,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 75 [2020-10-27 14:21:35,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-27 14:21:35,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:36,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:21:36,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:36,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:36,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:36,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:21:36,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:21:36,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:21:36,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:36,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:21:36,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:21:36,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:21:36,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:36,699 INFO L134 CoverageAnalysis]: Checked inductivity of 2700 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 1800 trivial. 0 not checked. [2020-10-27 14:21:36,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1578458447] [2020-10-27 14:21:36,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:21:36,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-27 14:21:36,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56981814] [2020-10-27 14:21:36,700 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-27 14:21:36,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:21:36,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-27 14:21:36,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 14:21:36,701 INFO L87 Difference]: Start difference. First operand 207 states and 211 transitions. Second operand 34 states. [2020-10-27 14:21:37,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:21:37,377 INFO L93 Difference]: Finished difference Result 353 states and 362 transitions. [2020-10-27 14:21:37,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-27 14:21:37,377 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 201 [2020-10-27 14:21:37,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:21:37,379 INFO L225 Difference]: With dead ends: 353 [2020-10-27 14:21:37,379 INFO L226 Difference]: Without dead ends: 216 [2020-10-27 14:21:37,381 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 14:21:37,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-27 14:21:37,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 213. [2020-10-27 14:21:37,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2020-10-27 14:21:37,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 217 transitions. [2020-10-27 14:21:37,390 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 217 transitions. Word has length 201 [2020-10-27 14:21:37,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:21:37,390 INFO L481 AbstractCegarLoop]: Abstraction has 213 states and 217 transitions. [2020-10-27 14:21:37,390 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-27 14:21:37,390 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 217 transitions. [2020-10-27 14:21:37,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2020-10-27 14:21:37,391 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:21:37,392 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:21:37,392 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-27 14:21:37,393 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:21:37,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:21:37,394 INFO L82 PathProgramCache]: Analyzing trace with hash 431542416, now seen corresponding path program 31 times [2020-10-27 14:21:37,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:21:37,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1770303026] [2020-10-27 14:21:37,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:21:37,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:37,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:37,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:37,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:42,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:42,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 217 [2020-10-27 14:21:42,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:21:42,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5229 [2020-10-27 14:21:42,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:42,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-27 14:21:42,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 77 [2020-10-27 14:21:42,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-27 14:21:42,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:43,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:21:43,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:43,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:43,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:43,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:21:43,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:21:43,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:21:43,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:43,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:21:43,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:21:43,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:21:43,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:43,541 INFO L134 CoverageAnalysis]: Checked inductivity of 2883 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 1922 trivial. 0 not checked. [2020-10-27 14:21:43,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1770303026] [2020-10-27 14:21:43,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:21:43,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-27 14:21:43,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331656846] [2020-10-27 14:21:43,542 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-27 14:21:43,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:21:43,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-27 14:21:43,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 14:21:43,543 INFO L87 Difference]: Start difference. First operand 213 states and 217 transitions. Second operand 35 states. [2020-10-27 14:21:44,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:21:44,154 INFO L93 Difference]: Finished difference Result 363 states and 372 transitions. [2020-10-27 14:21:44,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-27 14:21:44,155 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 207 [2020-10-27 14:21:44,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:21:44,158 INFO L225 Difference]: With dead ends: 363 [2020-10-27 14:21:44,158 INFO L226 Difference]: Without dead ends: 222 [2020-10-27 14:21:44,160 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 14:21:44,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-10-27 14:21:44,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 219. [2020-10-27 14:21:44,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2020-10-27 14:21:44,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 223 transitions. [2020-10-27 14:21:44,172 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 223 transitions. Word has length 207 [2020-10-27 14:21:44,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:21:44,172 INFO L481 AbstractCegarLoop]: Abstraction has 219 states and 223 transitions. [2020-10-27 14:21:44,172 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-27 14:21:44,172 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 223 transitions. [2020-10-27 14:21:44,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2020-10-27 14:21:44,174 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:21:44,174 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:21:44,174 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-27 14:21:44,174 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:21:44,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:21:44,175 INFO L82 PathProgramCache]: Analyzing trace with hash -691385558, now seen corresponding path program 32 times [2020-10-27 14:21:44,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:21:44,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [950996456] [2020-10-27 14:21:44,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:21:44,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:44,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:44,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:44,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:49,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:49,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 223 [2020-10-27 14:21:49,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:21:49,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5204 [2020-10-27 14:21:49,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:49,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-27 14:21:49,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 79 [2020-10-27 14:21:49,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-27 14:21:49,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:50,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:21:50,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:50,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:50,323 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:50,323 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:21:50,323 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:21:50,323 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:21:50,323 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:50,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:21:50,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:21:50,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:21:50,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:50,348 INFO L134 CoverageAnalysis]: Checked inductivity of 3072 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 2048 trivial. 0 not checked. [2020-10-27 14:21:50,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [950996456] [2020-10-27 14:21:50,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:21:50,349 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-27 14:21:50,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394245243] [2020-10-27 14:21:50,350 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-27 14:21:50,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:21:50,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-27 14:21:50,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 14:21:50,351 INFO L87 Difference]: Start difference. First operand 219 states and 223 transitions. Second operand 36 states. [2020-10-27 14:21:51,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:21:51,060 INFO L93 Difference]: Finished difference Result 373 states and 382 transitions. [2020-10-27 14:21:51,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-27 14:21:51,061 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 213 [2020-10-27 14:21:51,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:21:51,062 INFO L225 Difference]: With dead ends: 373 [2020-10-27 14:21:51,063 INFO L226 Difference]: Without dead ends: 228 [2020-10-27 14:21:51,064 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 14:21:51,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-10-27 14:21:51,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 225. [2020-10-27 14:21:51,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2020-10-27 14:21:51,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 229 transitions. [2020-10-27 14:21:51,072 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 229 transitions. Word has length 213 [2020-10-27 14:21:51,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:21:51,073 INFO L481 AbstractCegarLoop]: Abstraction has 225 states and 229 transitions. [2020-10-27 14:21:51,073 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-27 14:21:51,073 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 229 transitions. [2020-10-27 14:21:51,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2020-10-27 14:21:51,074 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:21:51,075 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:21:51,075 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-27 14:21:51,075 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:21:51,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:21:51,075 INFO L82 PathProgramCache]: Analyzing trace with hash 1846258244, now seen corresponding path program 33 times [2020-10-27 14:21:51,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:21:51,076 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1683543661] [2020-10-27 14:21:51,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:21:51,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:51,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:51,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:51,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:57,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:57,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 229 [2020-10-27 14:21:57,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:21:57,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6010 [2020-10-27 14:21:57,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:57,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-27 14:21:57,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 81 [2020-10-27 14:21:57,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-27 14:21:57,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:58,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:21:58,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:58,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:58,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:21:58,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:21:58,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:21:58,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:21:58,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:21:58,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:21:58,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:21:58,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:21:58,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:21:58,104 INFO L134 CoverageAnalysis]: Checked inductivity of 3267 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 2178 trivial. 0 not checked. [2020-10-27 14:21:58,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1683543661] [2020-10-27 14:21:58,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:21:58,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-27 14:21:58,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228016580] [2020-10-27 14:21:58,106 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-27 14:21:58,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:21:58,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-27 14:21:58,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 14:21:58,107 INFO L87 Difference]: Start difference. First operand 225 states and 229 transitions. Second operand 37 states. [2020-10-27 14:21:58,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:21:58,938 INFO L93 Difference]: Finished difference Result 383 states and 392 transitions. [2020-10-27 14:21:58,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-27 14:21:58,938 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 219 [2020-10-27 14:21:58,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:21:58,940 INFO L225 Difference]: With dead ends: 383 [2020-10-27 14:21:58,940 INFO L226 Difference]: Without dead ends: 234 [2020-10-27 14:21:58,941 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 14:21:58,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-10-27 14:21:58,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 231. [2020-10-27 14:21:58,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2020-10-27 14:21:58,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 235 transitions. [2020-10-27 14:21:58,950 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 235 transitions. Word has length 219 [2020-10-27 14:21:58,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:21:58,950 INFO L481 AbstractCegarLoop]: Abstraction has 231 states and 235 transitions. [2020-10-27 14:21:58,950 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-27 14:21:58,950 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 235 transitions. [2020-10-27 14:21:58,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2020-10-27 14:21:58,952 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:21:58,952 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:21:58,952 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-27 14:21:58,952 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:21:58,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:21:58,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1338536482, now seen corresponding path program 34 times [2020-10-27 14:21:58,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:21:58,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1801370673] [2020-10-27 14:21:58,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:21:58,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:21:58,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:59,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:21:59,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:04,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:04,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 235 [2020-10-27 14:22:04,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:22:04,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5576 [2020-10-27 14:22:04,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:04,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-27 14:22:04,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 83 [2020-10-27 14:22:04,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-27 14:22:04,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:22:05,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:22:05,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:05,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:05,509 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:05,509 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:22:05,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:22:05,509 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:22:05,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:05,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:22:05,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:22:05,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:22:05,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:22:05,537 INFO L134 CoverageAnalysis]: Checked inductivity of 3468 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 2312 trivial. 0 not checked. [2020-10-27 14:22:05,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1801370673] [2020-10-27 14:22:05,538 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:22:05,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-27 14:22:05,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020518297] [2020-10-27 14:22:05,538 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-27 14:22:05,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:22:05,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-27 14:22:05,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 14:22:05,540 INFO L87 Difference]: Start difference. First operand 231 states and 235 transitions. Second operand 38 states. [2020-10-27 14:22:06,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:22:06,381 INFO L93 Difference]: Finished difference Result 393 states and 402 transitions. [2020-10-27 14:22:06,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-27 14:22:06,382 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 225 [2020-10-27 14:22:06,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:22:06,384 INFO L225 Difference]: With dead ends: 393 [2020-10-27 14:22:06,384 INFO L226 Difference]: Without dead ends: 240 [2020-10-27 14:22:06,385 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 14:22:06,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-10-27 14:22:06,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 237. [2020-10-27 14:22:06,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2020-10-27 14:22:06,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 241 transitions. [2020-10-27 14:22:06,395 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 241 transitions. Word has length 225 [2020-10-27 14:22:06,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:22:06,395 INFO L481 AbstractCegarLoop]: Abstraction has 237 states and 241 transitions. [2020-10-27 14:22:06,395 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-27 14:22:06,395 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 241 transitions. [2020-10-27 14:22:06,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2020-10-27 14:22:06,397 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:22:06,397 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:22:06,397 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-27 14:22:06,397 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:22:06,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:22:06,398 INFO L82 PathProgramCache]: Analyzing trace with hash 1972409848, now seen corresponding path program 35 times [2020-10-27 14:22:06,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:22:06,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [236296191] [2020-10-27 14:22:06,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:22:06,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:06,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:06,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:06,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:11,713 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:11,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 241 [2020-10-27 14:22:11,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:22:11,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5297 [2020-10-27 14:22:11,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:11,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-27 14:22:11,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 85 [2020-10-27 14:22:11,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-27 14:22:11,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:22:12,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:22:12,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:12,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:12,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:12,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:22:12,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:22:12,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:22:12,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:12,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:22:12,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:22:12,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:22:12,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:22:12,773 INFO L134 CoverageAnalysis]: Checked inductivity of 3675 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2020-10-27 14:22:12,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [236296191] [2020-10-27 14:22:12,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:22:12,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-27 14:22:12,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437610193] [2020-10-27 14:22:12,774 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-27 14:22:12,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:22:12,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-27 14:22:12,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 14:22:12,775 INFO L87 Difference]: Start difference. First operand 237 states and 241 transitions. Second operand 39 states. [2020-10-27 14:22:13,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:22:13,474 INFO L93 Difference]: Finished difference Result 403 states and 412 transitions. [2020-10-27 14:22:13,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-27 14:22:13,475 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 231 [2020-10-27 14:22:13,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:22:13,477 INFO L225 Difference]: With dead ends: 403 [2020-10-27 14:22:13,477 INFO L226 Difference]: Without dead ends: 246 [2020-10-27 14:22:13,478 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 14:22:13,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-10-27 14:22:13,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 243. [2020-10-27 14:22:13,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2020-10-27 14:22:13,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 247 transitions. [2020-10-27 14:22:13,487 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 247 transitions. Word has length 231 [2020-10-27 14:22:13,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:22:13,488 INFO L481 AbstractCegarLoop]: Abstraction has 243 states and 247 transitions. [2020-10-27 14:22:13,488 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-27 14:22:13,488 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 247 transitions. [2020-10-27 14:22:13,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2020-10-27 14:22:13,489 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:22:13,490 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:22:13,490 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-27 14:22:13,490 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:22:13,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:22:13,491 INFO L82 PathProgramCache]: Analyzing trace with hash 1474388626, now seen corresponding path program 36 times [2020-10-27 14:22:13,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:22:13,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1079057580] [2020-10-27 14:22:13,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:22:13,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:13,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:13,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:13,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:18,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:18,621 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 247 [2020-10-27 14:22:18,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:22:18,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5113 [2020-10-27 14:22:18,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:18,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-27 14:22:18,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 87 [2020-10-27 14:22:18,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-27 14:22:18,621 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:22:19,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:22:19,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:19,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:19,750 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:19,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:22:19,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:22:19,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:22:19,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:19,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:22:19,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:22:19,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:22:19,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:22:19,796 INFO L134 CoverageAnalysis]: Checked inductivity of 3888 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 2592 trivial. 0 not checked. [2020-10-27 14:22:19,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1079057580] [2020-10-27 14:22:19,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:22:19,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-27 14:22:19,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406652747] [2020-10-27 14:22:19,797 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-27 14:22:19,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:22:19,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-27 14:22:19,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-27 14:22:19,799 INFO L87 Difference]: Start difference. First operand 243 states and 247 transitions. Second operand 40 states. [2020-10-27 14:22:20,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:22:20,692 INFO L93 Difference]: Finished difference Result 413 states and 422 transitions. [2020-10-27 14:22:20,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-27 14:22:20,693 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 237 [2020-10-27 14:22:20,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:22:20,695 INFO L225 Difference]: With dead ends: 413 [2020-10-27 14:22:20,695 INFO L226 Difference]: Without dead ends: 252 [2020-10-27 14:22:20,697 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-27 14:22:20,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-10-27 14:22:20,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 249. [2020-10-27 14:22:20,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2020-10-27 14:22:20,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 253 transitions. [2020-10-27 14:22:20,705 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 253 transitions. Word has length 237 [2020-10-27 14:22:20,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:22:20,706 INFO L481 AbstractCegarLoop]: Abstraction has 249 states and 253 transitions. [2020-10-27 14:22:20,706 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-27 14:22:20,706 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 253 transitions. [2020-10-27 14:22:20,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2020-10-27 14:22:20,707 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:22:20,708 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:22:20,708 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-27 14:22:20,708 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:22:20,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:22:20,708 INFO L82 PathProgramCache]: Analyzing trace with hash -327380052, now seen corresponding path program 37 times [2020-10-27 14:22:20,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:22:20,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1963799910] [2020-10-27 14:22:20,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:22:20,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:22:20,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:20,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:20,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:22:25,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:22:25,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 253 [2020-10-27 14:22:25,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:22:25,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5194 [2020-10-27 14:22:25,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:22:25,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-27 14:22:25,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 89 [2020-10-27 14:22:25,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-27 14:22:25,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0