/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=SHALLOWEST --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-lopstr16/flag_loopdep.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 19:48:37,228 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 19:48:37,232 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 19:48:37,271 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 19:48:37,272 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 19:48:37,274 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 19:48:37,275 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 19:48:37,278 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 19:48:37,281 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 19:48:37,282 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 19:48:37,283 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 19:48:37,285 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 19:48:37,286 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 19:48:37,287 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 19:48:37,288 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 19:48:37,290 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 19:48:37,291 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 19:48:37,292 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 19:48:37,295 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 19:48:37,307 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 19:48:37,309 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 19:48:37,311 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 19:48:37,313 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 19:48:37,314 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 19:48:37,317 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 19:48:37,318 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 19:48:37,318 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 19:48:37,319 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 19:48:37,320 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 19:48:37,321 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 19:48:37,321 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 19:48:37,322 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 19:48:37,323 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 19:48:37,324 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 19:48:37,325 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 19:48:37,326 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 19:48:37,327 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 19:48:37,327 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 19:48:37,327 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 19:48:37,329 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 19:48:37,330 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 19:48:37,331 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 [2020-10-26 19:48:37,371 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 19:48:37,372 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 19:48:37,376 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 19:48:37,377 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 19:48:37,377 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 19:48:37,377 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 19:48:37,378 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 19:48:37,380 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 19:48:37,380 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 19:48:37,380 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 19:48:37,381 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 19:48:37,382 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 19:48:37,382 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 19:48:37,382 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 19:48:37,383 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 19:48:37,383 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 19:48:37,383 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 19:48:37,383 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 19:48:37,384 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 19:48:37,384 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 19:48:37,384 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 19:48:37,384 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 19:48:37,385 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 19:48:37,385 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 19:48:37,385 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 19:48:37,385 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 19:48:37,386 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 19:48:37,386 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 19:48:37,386 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 19:48:37,386 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 19:48:37,894 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 19:48:37,931 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 19:48:37,935 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 19:48:37,937 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 19:48:37,938 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 19:48:37,940 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-lopstr16/flag_loopdep.i [2020-10-26 19:48:38,052 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c9b12c8fd/0e3f7723a16c441db51b2f3e38cc8f9a/FLAGe3e07ae2f [2020-10-26 19:48:38,758 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 19:48:38,759 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-lopstr16/flag_loopdep.i [2020-10-26 19:48:38,768 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c9b12c8fd/0e3f7723a16c441db51b2f3e38cc8f9a/FLAGe3e07ae2f [2020-10-26 19:48:39,121 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c9b12c8fd/0e3f7723a16c441db51b2f3e38cc8f9a [2020-10-26 19:48:39,125 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 19:48:39,135 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 19:48:39,138 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 19:48:39,138 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 19:48:39,145 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 19:48:39,146 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:48:39" (1/1) ... [2020-10-26 19:48:39,151 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ef2ac8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:48:39, skipping insertion in model container [2020-10-26 19:48:39,151 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:48:39" (1/1) ... [2020-10-26 19:48:39,162 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 19:48:39,184 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 19:48:39,384 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:48:39,396 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 19:48:39,422 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:48:39,443 INFO L208 MainTranslator]: Completed translation [2020-10-26 19:48:39,444 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:48:39 WrapperNode [2020-10-26 19:48:39,444 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 19:48:39,446 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 19:48:39,446 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 19:48:39,446 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 19:48:39,458 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:48:39" (1/1) ... [2020-10-26 19:48:39,459 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:48:39" (1/1) ... [2020-10-26 19:48:39,470 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:48:39" (1/1) ... [2020-10-26 19:48:39,470 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:48:39" (1/1) ... [2020-10-26 19:48:39,481 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:48:39" (1/1) ... [2020-10-26 19:48:39,488 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:48:39" (1/1) ... [2020-10-26 19:48:39,491 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:48:39" (1/1) ... [2020-10-26 19:48:39,494 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 19:48:39,495 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 19:48:39,496 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 19:48:39,496 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 19:48:39,497 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:48:39" (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 [2020-10-26 19:48:39,615 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 19:48:39,615 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 19:48:39,615 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 19:48:39,616 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-26 19:48:39,616 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2020-10-26 19:48:39,617 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 19:48:39,617 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 19:48:39,617 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 19:48:39,618 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-26 19:48:39,618 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-26 19:48:39,618 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 19:48:39,618 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 19:48:39,618 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-26 19:48:39,618 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-26 19:48:39,619 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_pointer [2020-10-26 19:48:39,619 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-26 19:48:39,619 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-26 19:48:39,619 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-26 19:48:39,619 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 19:48:39,619 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-26 19:48:39,620 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 19:48:39,620 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 19:48:39,620 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 19:48:39,620 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 19:48:39,620 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 19:48:39,621 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 19:48:40,107 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 19:48:40,107 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-26 19:48:40,109 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:48:40 BoogieIcfgContainer [2020-10-26 19:48:40,109 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 19:48:40,111 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 19:48:40,112 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 19:48:40,115 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 19:48:40,115 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 07:48:39" (1/3) ... [2020-10-26 19:48:40,116 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64b0b537 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:48:40, skipping insertion in model container [2020-10-26 19:48:40,116 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:48:39" (2/3) ... [2020-10-26 19:48:40,116 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64b0b537 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:48:40, skipping insertion in model container [2020-10-26 19:48:40,117 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:48:40" (3/3) ... [2020-10-26 19:48:40,118 INFO L111 eAbstractionObserver]: Analyzing ICFG flag_loopdep.i [2020-10-26 19:48:40,128 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 19:48:40,133 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 19:48:40,147 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 19:48:40,176 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 19:48:40,176 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 19:48:40,176 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 19:48:40,177 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 19:48:40,177 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 19:48:40,177 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 19:48:40,177 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 19:48:40,177 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 19:48:40,196 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-10-26 19:48:40,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-26 19:48:40,203 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:48:40,204 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] [2020-10-26 19:48:40,205 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:48:40,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:48:40,211 INFO L82 PathProgramCache]: Analyzing trace with hash -1917384497, now seen corresponding path program 1 times [2020-10-26 19:48:40,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:48:40,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [946607644] [2020-10-26 19:48:40,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:48:40,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:40,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:40,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:40,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:40,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-26 19:48:40,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:48:40,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 415 [2020-10-26 19:48:40,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:40,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:48:40,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-26 19:48:40,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:48:40,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-26 19:48:40,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:48:40,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:40,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:40,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:40,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:48:40,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:48:40,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-26 19:48:40,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:40,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:48:40,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:48:40,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:48:40,894 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:48:40,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:48:40,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:40,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:40,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:40,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:48:40,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:48:40,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:48:40,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:40,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:48:40,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-26 19:48:40,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:48:40,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:48:40,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:48:40,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [946607644] [2020-10-26 19:48:40,948 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:48:40,949 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 19:48:40,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63117011] [2020-10-26 19:48:40,955 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 19:48:40,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:48:40,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 19:48:40,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 19:48:40,974 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 4 states. [2020-10-26 19:48:41,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:48:41,167 INFO L93 Difference]: Finished difference Result 66 states and 86 transitions. [2020-10-26 19:48:41,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-26 19:48:41,169 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-10-26 19:48:41,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:48:41,180 INFO L225 Difference]: With dead ends: 66 [2020-10-26 19:48:41,180 INFO L226 Difference]: Without dead ends: 33 [2020-10-26 19:48:41,184 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:48:41,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-26 19:48:41,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2020-10-26 19:48:41,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-26 19:48:41,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-10-26 19:48:41,235 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 22 [2020-10-26 19:48:41,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:48:41,235 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-10-26 19:48:41,235 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 19:48:41,236 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-10-26 19:48:41,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-26 19:48:41,237 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:48:41,237 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] [2020-10-26 19:48:41,238 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 19:48:41,238 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:48:41,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:48:41,239 INFO L82 PathProgramCache]: Analyzing trace with hash 1115967253, now seen corresponding path program 1 times [2020-10-26 19:48:41,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:48:41,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1574423689] [2020-10-26 19:48:41,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:48:41,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:41,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:41,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:41,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:41,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-26 19:48:41,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:48:41,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 340 [2020-10-26 19:48:41,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:41,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 19:48:41,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:48:41,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-26 19:48:41,612 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-26 19:48:41,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:48:41,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:41,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:41,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:41,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:48:41,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:48:41,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-26 19:48:41,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:41,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:48:41,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:48:41,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:48:41,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:48:41,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:48:41,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:41,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:41,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:41,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:48:41,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:48:41,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-26 19:48:41,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:41,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 19:48:41,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:48:41,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:48:41,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:48:41,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:48:41,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1574423689] [2020-10-26 19:48:41,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:48:41,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 19:48:41,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208013423] [2020-10-26 19:48:41,863 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 19:48:41,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:48:41,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 19:48:41,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-26 19:48:41,865 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 6 states. [2020-10-26 19:48:42,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:48:42,119 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2020-10-26 19:48:42,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 19:48:42,120 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-10-26 19:48:42,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:48:42,121 INFO L225 Difference]: With dead ends: 52 [2020-10-26 19:48:42,121 INFO L226 Difference]: Without dead ends: 32 [2020-10-26 19:48:42,123 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-26 19:48:42,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-26 19:48:42,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2020-10-26 19:48:42,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-26 19:48:42,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-10-26 19:48:42,133 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 22 [2020-10-26 19:48:42,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:48:42,134 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-10-26 19:48:42,134 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 19:48:42,134 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-10-26 19:48:42,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-26 19:48:42,135 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:48:42,135 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] [2020-10-26 19:48:42,135 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 19:48:42,136 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:48:42,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:48:42,136 INFO L82 PathProgramCache]: Analyzing trace with hash -891180873, now seen corresponding path program 1 times [2020-10-26 19:48:42,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:48:42,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [194003063] [2020-10-26 19:48:42,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:48:42,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:42,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:42,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:42,456 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:42,459 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-26 19:48:42,459 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:48:42,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 300 [2020-10-26 19:48:42,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:42,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 19:48:42,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:48:42,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:48:42,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:48:42,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:48:42,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:42,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:42,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:42,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:48:42,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:48:42,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:48:42,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:42,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:48:42,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:48:42,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:48:42,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:48:42,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:48:42,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:42,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:42,562 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:42,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-26 19:48:42,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:48:42,563 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-26 19:48:42,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:42,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 19:48:42,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:48:42,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-26 19:48:42,564 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:48:42,653 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:48:42,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [194003063] [2020-10-26 19:48:42,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:48:42,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 19:48:42,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661654816] [2020-10-26 19:48:42,655 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 19:48:42,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:48:42,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 19:48:42,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-26 19:48:42,656 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 7 states. [2020-10-26 19:48:42,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:48:42,895 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2020-10-26 19:48:42,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 19:48:42,895 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-10-26 19:48:42,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:48:42,897 INFO L225 Difference]: With dead ends: 54 [2020-10-26 19:48:42,897 INFO L226 Difference]: Without dead ends: 34 [2020-10-26 19:48:42,898 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:48:42,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-26 19:48:42,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-10-26 19:48:42,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-26 19:48:42,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-10-26 19:48:42,906 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 24 [2020-10-26 19:48:42,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:48:42,906 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-10-26 19:48:42,907 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 19:48:42,907 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-10-26 19:48:42,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-26 19:48:42,908 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:48:42,908 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:48:42,908 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 19:48:42,908 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:48:42,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:48:42,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1320214055, now seen corresponding path program 2 times [2020-10-26 19:48:42,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:48:42,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [51751478] [2020-10-26 19:48:42,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:48:42,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:42,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:42,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:43,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:43,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-26 19:48:43,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:48:43,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 300 [2020-10-26 19:48:43,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:43,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:48:43,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:48:43,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-26 19:48:43,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:48:43,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:48:43,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:43,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:43,272 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:43,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:48:43,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:48:43,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:48:43,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:43,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:48:43,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:48:43,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:48:43,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:48:43,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:48:43,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:43,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:43,342 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:43,343 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-26 19:48:43,343 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:48:43,343 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-10-26 19:48:43,343 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:43,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:48:43,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:48:43,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-26 19:48:43,344 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:48:43,400 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:48:43,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [51751478] [2020-10-26 19:48:43,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:48:43,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 19:48:43,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038636059] [2020-10-26 19:48:43,402 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 19:48:43,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:48:43,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 19:48:43,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-26 19:48:43,403 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 8 states. [2020-10-26 19:48:43,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:48:43,619 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2020-10-26 19:48:43,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 19:48:43,620 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2020-10-26 19:48:43,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:48:43,621 INFO L225 Difference]: With dead ends: 56 [2020-10-26 19:48:43,621 INFO L226 Difference]: Without dead ends: 36 [2020-10-26 19:48:43,622 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:48:43,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-26 19:48:43,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-10-26 19:48:43,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-26 19:48:43,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-10-26 19:48:43,630 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 26 [2020-10-26 19:48:43,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:48:43,630 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-10-26 19:48:43,630 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 19:48:43,630 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-10-26 19:48:43,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-26 19:48:43,631 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:48:43,632 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:48:43,632 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 19:48:43,632 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:48:43,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:48:43,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1304241541, now seen corresponding path program 3 times [2020-10-26 19:48:43,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:48:43,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1324768126] [2020-10-26 19:48:43,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:48:43,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:43,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:43,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:44,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:44,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-26 19:48:44,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:48:44,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 402 [2020-10-26 19:48:44,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:44,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 19:48:44,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:48:44,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-26 19:48:44,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:48:44,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:48:44,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:44,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:44,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:44,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:48:44,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:48:44,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:48:44,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:44,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:48:44,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:48:44,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:48:44,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:48:44,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:48:44,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:44,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:44,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:44,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-26 19:48:44,269 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:48:44,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 118 [2020-10-26 19:48:44,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:44,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 19:48:44,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:48:44,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 19:48:44,270 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:48:44,321 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:48:44,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1324768126] [2020-10-26 19:48:44,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:48:44,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-26 19:48:44,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811710461] [2020-10-26 19:48:44,323 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-26 19:48:44,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:48:44,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-26 19:48:44,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-26 19:48:44,324 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 9 states. [2020-10-26 19:48:44,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:48:44,513 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2020-10-26 19:48:44,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 19:48:44,514 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-10-26 19:48:44,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:48:44,515 INFO L225 Difference]: With dead ends: 58 [2020-10-26 19:48:44,515 INFO L226 Difference]: Without dead ends: 38 [2020-10-26 19:48:44,516 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:48:44,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-26 19:48:44,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-10-26 19:48:44,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-26 19:48:44,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2020-10-26 19:48:44,524 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 28 [2020-10-26 19:48:44,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:48:44,524 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2020-10-26 19:48:44,524 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-26 19:48:44,524 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2020-10-26 19:48:44,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-26 19:48:44,525 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:48:44,526 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:48:44,526 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 19:48:44,526 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:48:44,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:48:44,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1160442525, now seen corresponding path program 4 times [2020-10-26 19:48:44,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:48:44,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [570076939] [2020-10-26 19:48:44,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:48:44,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:44,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:44,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:45,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:45,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-26 19:48:45,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:48:45,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 469 [2020-10-26 19:48:45,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:45,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-26 19:48:45,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:48:45,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 19:48:45,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:48:45,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:48:45,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:45,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:45,057 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:45,057 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:48:45,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:48:45,057 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:48:45,058 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:45,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:48:45,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:48:45,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:48:45,058 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:48:45,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:48:45,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:45,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:45,186 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:45,186 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-26 19:48:45,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:48:45,186 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 101 [2020-10-26 19:48:45,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:45,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-26 19:48:45,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:48:45,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-26 19:48:45,188 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:48:45,253 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:48:45,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [570076939] [2020-10-26 19:48:45,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:48:45,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 19:48:45,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926204968] [2020-10-26 19:48:45,255 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 19:48:45,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:48:45,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 19:48:45,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:48:45,256 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 10 states. [2020-10-26 19:48:45,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:48:45,459 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2020-10-26 19:48:45,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 19:48:45,460 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2020-10-26 19:48:45,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:48:45,461 INFO L225 Difference]: With dead ends: 60 [2020-10-26 19:48:45,461 INFO L226 Difference]: Without dead ends: 40 [2020-10-26 19:48:45,462 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:48:45,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-26 19:48:45,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-10-26 19:48:45,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-26 19:48:45,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2020-10-26 19:48:45,468 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 30 [2020-10-26 19:48:45,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:48:45,469 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2020-10-26 19:48:45,469 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 19:48:45,469 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2020-10-26 19:48:45,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-26 19:48:45,470 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:48:45,470 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:48:45,471 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 19:48:45,471 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:48:45,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:48:45,472 INFO L82 PathProgramCache]: Analyzing trace with hash -1100117441, now seen corresponding path program 5 times [2020-10-26 19:48:45,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:48:45,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [38274617] [2020-10-26 19:48:45,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:48:45,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:45,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:45,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:46,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:46,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-26 19:48:46,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:48:46,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 606 [2020-10-26 19:48:46,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:46,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:48:46,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:48:46,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-26 19:48:46,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:48:46,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:48:46,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:46,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:46,143 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:46,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:48:46,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:48:46,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:48:46,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:46,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:48:46,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:48:46,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:48:46,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:48:46,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:48:46,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:46,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:46,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:46,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-26 19:48:46,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:48:46,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 133 [2020-10-26 19:48:46,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:46,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:48:46,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:48:46,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 19:48:46,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:48:46,388 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:48:46,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [38274617] [2020-10-26 19:48:46,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:48:46,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-26 19:48:46,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537971313] [2020-10-26 19:48:46,390 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-26 19:48:46,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:48:46,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-26 19:48:46,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:48:46,392 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 11 states. [2020-10-26 19:48:46,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:48:46,639 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2020-10-26 19:48:46,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 19:48:46,640 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2020-10-26 19:48:46,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:48:46,641 INFO L225 Difference]: With dead ends: 62 [2020-10-26 19:48:46,641 INFO L226 Difference]: Without dead ends: 42 [2020-10-26 19:48:46,642 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:48:46,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-26 19:48:46,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-10-26 19:48:46,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-26 19:48:46,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2020-10-26 19:48:46,649 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 32 [2020-10-26 19:48:46,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:48:46,650 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2020-10-26 19:48:46,650 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-26 19:48:46,650 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2020-10-26 19:48:46,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-26 19:48:46,651 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:48:46,651 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:48:46,651 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 19:48:46,652 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:48:46,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:48:46,652 INFO L82 PathProgramCache]: Analyzing trace with hash -244792991, now seen corresponding path program 6 times [2020-10-26 19:48:46,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:48:46,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [966697576] [2020-10-26 19:48:46,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:48:46,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:46,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:46,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:47,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:47,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-26 19:48:47,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:48:47,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 712 [2020-10-26 19:48:47,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:47,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 19:48:47,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:48:47,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 19:48:47,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:48:47,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:48:47,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:47,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:47,429 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:47,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:48:47,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:48:47,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:48:47,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:47,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:48:47,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:48:47,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:48:47,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:48:47,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:48:47,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:47,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:47,634 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:47,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-26 19:48:47,635 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:48:47,635 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 173 [2020-10-26 19:48:47,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:47,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 19:48:47,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:48:47,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 19:48:47,636 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:48:47,930 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:48:47,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [966697576] [2020-10-26 19:48:47,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:48:47,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-26 19:48:47,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837291653] [2020-10-26 19:48:47,932 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 19:48:47,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:48:47,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 19:48:47,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:48:47,933 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 12 states. [2020-10-26 19:48:48,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:48:48,184 INFO L93 Difference]: Finished difference Result 64 states and 72 transitions. [2020-10-26 19:48:48,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 19:48:48,185 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 34 [2020-10-26 19:48:48,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:48:48,186 INFO L225 Difference]: With dead ends: 64 [2020-10-26 19:48:48,186 INFO L226 Difference]: Without dead ends: 44 [2020-10-26 19:48:48,189 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:48:48,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-26 19:48:48,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-10-26 19:48:48,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-26 19:48:48,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2020-10-26 19:48:48,202 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 34 [2020-10-26 19:48:48,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:48:48,203 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2020-10-26 19:48:48,203 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 19:48:48,203 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2020-10-26 19:48:48,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-26 19:48:48,205 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:48:48,206 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:48:48,206 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 19:48:48,206 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:48:48,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:48:48,207 INFO L82 PathProgramCache]: Analyzing trace with hash 1383249923, now seen corresponding path program 7 times [2020-10-26 19:48:48,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:48:48,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1000817107] [2020-10-26 19:48:48,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:48:48,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:48,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:48,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:49,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:49,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-26 19:48:49,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:48:49,139 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 896 [2020-10-26 19:48:49,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:49,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:48:49,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:48:49,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 19:48:49,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 19:48:49,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:48:49,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:49,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:49,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:49,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:48:49,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:48:49,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:48:49,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:49,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:48:49,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:48:49,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:48:49,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:48:49,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:48:49,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:49,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:49,448 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:49,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-26 19:48:49,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:48:49,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 214 [2020-10-26 19:48:49,449 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:49,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:48:49,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:48:49,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 19:48:49,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:48:49,573 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:48:49,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1000817107] [2020-10-26 19:48:49,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:48:49,574 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-26 19:48:49,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311036261] [2020-10-26 19:48:49,576 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-26 19:48:49,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:48:49,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-26 19:48:49,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:48:49,581 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 13 states. [2020-10-26 19:48:49,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:48:49,788 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2020-10-26 19:48:49,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 19:48:49,789 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2020-10-26 19:48:49,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:48:49,790 INFO L225 Difference]: With dead ends: 66 [2020-10-26 19:48:49,790 INFO L226 Difference]: Without dead ends: 46 [2020-10-26 19:48:49,791 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:48:49,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-26 19:48:49,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-10-26 19:48:49,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-26 19:48:49,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2020-10-26 19:48:49,802 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 36 [2020-10-26 19:48:49,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:48:49,802 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2020-10-26 19:48:49,804 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-26 19:48:49,805 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2020-10-26 19:48:49,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-26 19:48:49,806 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:48:49,806 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:48:49,806 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 19:48:49,806 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:48:49,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:48:49,808 INFO L82 PathProgramCache]: Analyzing trace with hash -1730572763, now seen corresponding path program 8 times [2020-10-26 19:48:49,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:48:49,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [31741702] [2020-10-26 19:48:49,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:48:49,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:49,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:49,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:50,963 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:50,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-26 19:48:50,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:48:50,964 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1133 [2020-10-26 19:48:50,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:50,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 19:48:50,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:48:50,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 19:48:50,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:48:51,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:48:51,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:51,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:51,011 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:51,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:48:51,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:48:51,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:48:51,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:51,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:48:51,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:48:51,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:48:51,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:48:51,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:48:51,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:51,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:51,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:51,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-26 19:48:51,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:48:51,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 277 [2020-10-26 19:48:51,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:51,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 19:48:51,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:48:51,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 19:48:51,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:48:51,663 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:48:51,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [31741702] [2020-10-26 19:48:51,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:48:51,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-26 19:48:51,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721123874] [2020-10-26 19:48:51,666 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-26 19:48:51,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:48:51,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-26 19:48:51,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:48:51,667 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 14 states. [2020-10-26 19:48:51,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:48:51,960 INFO L93 Difference]: Finished difference Result 68 states and 76 transitions. [2020-10-26 19:48:51,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-26 19:48:51,960 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 38 [2020-10-26 19:48:51,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:48:51,961 INFO L225 Difference]: With dead ends: 68 [2020-10-26 19:48:51,961 INFO L226 Difference]: Without dead ends: 48 [2020-10-26 19:48:51,962 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:48:51,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-26 19:48:51,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2020-10-26 19:48:51,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-26 19:48:51,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2020-10-26 19:48:51,969 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 38 [2020-10-26 19:48:51,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:48:51,969 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2020-10-26 19:48:51,969 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-26 19:48:51,969 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2020-10-26 19:48:51,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-26 19:48:51,970 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:48:51,970 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:48:51,970 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 19:48:51,971 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:48:51,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:48:51,971 INFO L82 PathProgramCache]: Analyzing trace with hash -521968697, now seen corresponding path program 9 times [2020-10-26 19:48:51,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:48:51,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [583437578] [2020-10-26 19:48:51,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:48:51,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:52,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:52,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:53,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:53,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-26 19:48:53,139 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:48:53,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1146 [2020-10-26 19:48:53,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:53,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 19:48:53,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:48:53,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 19:48:53,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:48:53,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:48:53,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:53,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:53,220 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:53,221 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:48:53,221 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:48:53,221 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 19:48:53,221 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:53,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:48:53,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:48:53,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:48:53,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:48:53,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:48:53,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:53,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:53,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:53,562 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-26 19:48:53,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:48:53,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 312 [2020-10-26 19:48:53,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:53,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 19:48:53,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:48:53,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-26 19:48:53,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:48:53,757 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:48:53,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [583437578] [2020-10-26 19:48:53,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:48:53,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-26 19:48:53,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954866676] [2020-10-26 19:48:53,759 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-26 19:48:53,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:48:53,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-26 19:48:53,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:48:53,760 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 15 states. [2020-10-26 19:48:54,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:48:54,085 INFO L93 Difference]: Finished difference Result 70 states and 78 transitions. [2020-10-26 19:48:54,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-26 19:48:54,086 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 40 [2020-10-26 19:48:54,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:48:54,087 INFO L225 Difference]: With dead ends: 70 [2020-10-26 19:48:54,087 INFO L226 Difference]: Without dead ends: 50 [2020-10-26 19:48:54,090 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:48:54,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-26 19:48:54,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2020-10-26 19:48:54,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-26 19:48:54,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2020-10-26 19:48:54,109 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 40 [2020-10-26 19:48:54,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:48:54,109 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2020-10-26 19:48:54,110 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-26 19:48:54,110 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2020-10-26 19:48:54,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-26 19:48:54,114 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:48:54,114 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:48:54,114 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 19:48:54,114 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:48:54,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:48:54,118 INFO L82 PathProgramCache]: Analyzing trace with hash 1305368809, now seen corresponding path program 10 times [2020-10-26 19:48:54,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:48:54,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1029552569] [2020-10-26 19:48:54,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:48:54,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:54,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:54,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:55,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:55,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-26 19:48:55,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:48:55,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1439 [2020-10-26 19:48:55,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:55,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-26 19:48:55,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:48:55,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-26 19:48:55,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:48:55,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:48:55,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:55,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:55,644 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:55,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:48:55,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:48:55,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:48:55,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:55,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:48:55,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:48:55,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:48:55,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:48:55,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:48:55,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:55,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:56,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:56,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-26 19:48:56,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:48:56,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 331 [2020-10-26 19:48:56,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:56,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-26 19:48:56,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:48:56,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-26 19:48:56,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:48:56,444 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:48:56,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1029552569] [2020-10-26 19:48:56,445 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:48:56,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-26 19:48:56,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966166650] [2020-10-26 19:48:56,446 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 19:48:56,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:48:56,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 19:48:56,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:48:56,447 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand 16 states. [2020-10-26 19:48:56,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:48:56,770 INFO L93 Difference]: Finished difference Result 72 states and 80 transitions. [2020-10-26 19:48:56,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-26 19:48:56,771 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 42 [2020-10-26 19:48:56,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:48:56,772 INFO L225 Difference]: With dead ends: 72 [2020-10-26 19:48:56,772 INFO L226 Difference]: Without dead ends: 52 [2020-10-26 19:48:56,773 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=118, Invalid=224, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:48:56,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-26 19:48:56,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-10-26 19:48:56,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-26 19:48:56,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2020-10-26 19:48:56,781 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 42 [2020-10-26 19:48:56,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:48:56,782 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2020-10-26 19:48:56,782 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 19:48:56,782 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2020-10-26 19:48:56,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-26 19:48:56,783 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:48:56,783 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:48:56,783 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 19:48:56,783 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:48:56,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:48:56,784 INFO L82 PathProgramCache]: Analyzing trace with hash 735088011, now seen corresponding path program 11 times [2020-10-26 19:48:56,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:48:56,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1494653071] [2020-10-26 19:48:56,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:48:56,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:56,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:56,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:58,325 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:58,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-26 19:48:58,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:48:58,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1517 [2020-10-26 19:48:58,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:58,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:48:58,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:48:58,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-26 19:48:58,327 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:48:58,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:48:58,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:58,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:58,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:58,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:48:58,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:48:58,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:48:58,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:58,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:48:58,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:48:58,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:48:58,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:48:58,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:48:58,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:58,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:58,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:48:58,837 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-26 19:48:58,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:48:58,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 391 [2020-10-26 19:48:58,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:48:58,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:48:58,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:48:58,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-26 19:48:58,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:48:59,050 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:48:59,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1494653071] [2020-10-26 19:48:59,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:48:59,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-26 19:48:59,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938836955] [2020-10-26 19:48:59,051 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-26 19:48:59,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:48:59,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-26 19:48:59,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:48:59,053 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand 17 states. [2020-10-26 19:48:59,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:48:59,378 INFO L93 Difference]: Finished difference Result 74 states and 82 transitions. [2020-10-26 19:48:59,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-26 19:48:59,378 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 44 [2020-10-26 19:48:59,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:48:59,379 INFO L225 Difference]: With dead ends: 74 [2020-10-26 19:48:59,380 INFO L226 Difference]: Without dead ends: 54 [2020-10-26 19:48:59,381 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:48:59,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-26 19:48:59,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2020-10-26 19:48:59,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-26 19:48:59,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2020-10-26 19:48:59,388 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 44 [2020-10-26 19:48:59,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:48:59,388 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2020-10-26 19:48:59,388 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-26 19:48:59,389 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2020-10-26 19:48:59,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-26 19:48:59,389 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:48:59,389 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:48:59,390 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 19:48:59,390 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:48:59,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:48:59,390 INFO L82 PathProgramCache]: Analyzing trace with hash -1843912275, now seen corresponding path program 12 times [2020-10-26 19:48:59,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:48:59,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1363591139] [2020-10-26 19:48:59,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:48:59,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:48:59,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:48:59,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:00,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:49:00,893 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-26 19:49:00,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:49:00,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1480 [2020-10-26 19:49:00,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:49:00,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-26 19:49:00,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:49:00,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-26 19:49:00,894 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:49:00,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:49:00,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:49:00,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:00,928 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:49:00,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:49:00,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:49:00,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:49:00,929 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:49:00,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:49:00,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:49:00,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:49:00,930 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:49:00,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:49:00,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:49:00,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:01,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:49:01,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-26 19:49:01,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:49:01,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 436 [2020-10-26 19:49:01,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:49:01,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-26 19:49:01,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:49:01,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 19:49:01,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:49:01,590 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:49:01,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1363591139] [2020-10-26 19:49:01,591 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:49:01,591 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-26 19:49:01,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111081900] [2020-10-26 19:49:01,592 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-26 19:49:01,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:49:01,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-26 19:49:01,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:49:01,594 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand 18 states. [2020-10-26 19:49:01,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:49:01,824 INFO L93 Difference]: Finished difference Result 76 states and 84 transitions. [2020-10-26 19:49:01,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-26 19:49:01,824 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 46 [2020-10-26 19:49:01,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:49:01,825 INFO L225 Difference]: With dead ends: 76 [2020-10-26 19:49:01,825 INFO L226 Difference]: Without dead ends: 56 [2020-10-26 19:49:01,826 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=137, Invalid=283, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:49:01,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-26 19:49:01,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2020-10-26 19:49:01,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-26 19:49:01,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2020-10-26 19:49:01,836 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 46 [2020-10-26 19:49:01,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:49:01,837 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2020-10-26 19:49:01,837 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-26 19:49:01,837 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2020-10-26 19:49:01,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-26 19:49:01,838 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:49:01,838 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:49:01,838 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-26 19:49:01,839 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:49:01,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:49:01,839 INFO L82 PathProgramCache]: Analyzing trace with hash -2067057329, now seen corresponding path program 13 times [2020-10-26 19:49:01,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:49:01,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1375751057] [2020-10-26 19:49:01,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:49:01,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:49:01,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:01,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:03,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:49:03,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-26 19:49:03,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:49:03,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1666 [2020-10-26 19:49:03,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:49:03,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-26 19:49:03,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:49:03,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 19:49:03,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:49:03,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:49:03,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:49:03,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:03,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:49:03,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:49:03,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:49:03,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:49:03,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:49:03,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:49:03,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:49:03,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:49:03,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:49:03,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:49:03,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:49:03,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:04,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:49:04,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-26 19:49:04,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:49:04,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 536 [2020-10-26 19:49:04,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:49:04,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-26 19:49:04,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:49:04,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-26 19:49:04,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:49:04,398 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:49:04,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1375751057] [2020-10-26 19:49:04,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:49:04,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-26 19:49:04,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163809163] [2020-10-26 19:49:04,399 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-26 19:49:04,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:49:04,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-26 19:49:04,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:49:04,400 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand 19 states. [2020-10-26 19:49:04,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:49:04,702 INFO L93 Difference]: Finished difference Result 78 states and 86 transitions. [2020-10-26 19:49:04,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-26 19:49:04,703 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 48 [2020-10-26 19:49:04,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:49:04,704 INFO L225 Difference]: With dead ends: 78 [2020-10-26 19:49:04,704 INFO L226 Difference]: Without dead ends: 58 [2020-10-26 19:49:04,706 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=153, Invalid=309, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:49:04,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-26 19:49:04,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2020-10-26 19:49:04,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-26 19:49:04,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2020-10-26 19:49:04,713 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 48 [2020-10-26 19:49:04,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:49:04,713 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2020-10-26 19:49:04,713 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-26 19:49:04,713 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2020-10-26 19:49:04,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-26 19:49:04,714 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:49:04,714 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:49:04,714 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-26 19:49:04,715 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:49:04,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:49:04,715 INFO L82 PathProgramCache]: Analyzing trace with hash -1761089423, now seen corresponding path program 14 times [2020-10-26 19:49:04,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:49:04,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1455555613] [2020-10-26 19:49:04,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:49:04,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:49:04,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:04,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:06,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:49:06,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-26 19:49:06,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:49:06,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1744 [2020-10-26 19:49:06,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:49:06,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 19:49:06,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:49:06,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-26 19:49:06,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:49:06,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:49:06,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:49:06,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:06,538 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:49:06,538 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:49:06,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:49:06,539 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:49:06,539 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:49:06,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:49:06,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:49:06,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:49:06,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:49:06,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:49:06,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:49:06,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:07,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:49:07,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-26 19:49:07,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:49:07,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 494 [2020-10-26 19:49:07,071 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:49:07,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 19:49:07,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:49:07,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-26 19:49:07,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:49:07,740 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:49:07,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1455555613] [2020-10-26 19:49:07,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:49:07,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-26 19:49:07,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807137194] [2020-10-26 19:49:07,745 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-26 19:49:07,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:49:07,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-26 19:49:07,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=238, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:49:07,747 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand 20 states. [2020-10-26 19:49:08,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:49:08,104 INFO L93 Difference]: Finished difference Result 80 states and 88 transitions. [2020-10-26 19:49:08,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-26 19:49:08,105 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 50 [2020-10-26 19:49:08,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:49:08,107 INFO L225 Difference]: With dead ends: 80 [2020-10-26 19:49:08,107 INFO L226 Difference]: Without dead ends: 60 [2020-10-26 19:49:08,108 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:49:08,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-26 19:49:08,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2020-10-26 19:49:08,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-26 19:49:08,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2020-10-26 19:49:08,115 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 50 [2020-10-26 19:49:08,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:49:08,115 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2020-10-26 19:49:08,115 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-26 19:49:08,115 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2020-10-26 19:49:08,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-26 19:49:08,116 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:49:08,116 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:49:08,116 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-26 19:49:08,116 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:49:08,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:49:08,117 INFO L82 PathProgramCache]: Analyzing trace with hash 216292115, now seen corresponding path program 15 times [2020-10-26 19:49:08,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:49:08,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1735651806] [2020-10-26 19:49:08,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:49:08,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:49:08,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:08,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:10,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:49:10,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-26 19:49:10,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:49:10,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2071 [2020-10-26 19:49:10,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:49:10,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-26 19:49:10,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:49:10,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-26 19:49:10,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:49:10,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:49:10,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:49:10,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:10,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:49:10,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:49:10,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:49:10,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-26 19:49:10,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:49:10,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:49:10,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:49:10,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:49:10,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:49:10,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:49:10,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:49:10,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:10,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:49:10,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-26 19:49:10,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:49:10,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 466 [2020-10-26 19:49:10,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:49:10,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-26 19:49:10,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:49:10,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 19:49:10,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:49:11,066 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:49:11,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1735651806] [2020-10-26 19:49:11,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:49:11,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-26 19:49:11,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914161465] [2020-10-26 19:49:11,068 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-26 19:49:11,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:49:11,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-26 19:49:11,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=261, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:49:11,069 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand 21 states. [2020-10-26 19:49:11,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:49:11,376 INFO L93 Difference]: Finished difference Result 82 states and 90 transitions. [2020-10-26 19:49:11,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-26 19:49:11,377 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 52 [2020-10-26 19:49:11,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:49:11,378 INFO L225 Difference]: With dead ends: 82 [2020-10-26 19:49:11,378 INFO L226 Difference]: Without dead ends: 62 [2020-10-26 19:49:11,379 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=188, Invalid=364, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:49:11,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-26 19:49:11,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2020-10-26 19:49:11,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-26 19:49:11,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2020-10-26 19:49:11,391 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 52 [2020-10-26 19:49:11,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:49:11,391 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2020-10-26 19:49:11,391 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-26 19:49:11,392 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2020-10-26 19:49:11,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-26 19:49:11,398 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:49:11,398 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:49:11,398 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-26 19:49:11,398 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:49:11,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:49:11,402 INFO L82 PathProgramCache]: Analyzing trace with hash 2104405301, now seen corresponding path program 16 times [2020-10-26 19:49:11,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:49:11,402 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1688152149] [2020-10-26 19:49:11,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:49:11,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:49:11,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:11,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:13,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:49:13,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-26 19:49:13,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:49:13,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2450 [2020-10-26 19:49:13,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:49:13,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-26 19:49:13,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:49:13,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 19:49:13,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:49:13,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:49:13,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:49:13,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:13,937 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:49:13,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:49:13,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:49:13,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:49:13,938 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:49:13,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:49:13,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:49:13,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:49:13,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:49:13,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:49:13,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:49:13,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:14,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:49:14,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-26 19:49:14,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:49:14,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 770 [2020-10-26 19:49:14,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:49:14,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-26 19:49:14,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:49:14,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 19:49:14,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:49:15,600 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:49:15,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1688152149] [2020-10-26 19:49:15,601 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:49:15,601 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-26 19:49:15,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641295852] [2020-10-26 19:49:15,601 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-26 19:49:15,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:49:15,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-26 19:49:15,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=285, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:49:15,603 INFO L87 Difference]: Start difference. First operand 61 states and 65 transitions. Second operand 22 states. [2020-10-26 19:49:15,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:49:15,969 INFO L93 Difference]: Finished difference Result 84 states and 92 transitions. [2020-10-26 19:49:15,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-26 19:49:15,970 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 54 [2020-10-26 19:49:15,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:49:15,971 INFO L225 Difference]: With dead ends: 84 [2020-10-26 19:49:15,971 INFO L226 Difference]: Without dead ends: 64 [2020-10-26 19:49:15,972 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=223, Invalid=377, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:49:15,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-26 19:49:15,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2020-10-26 19:49:15,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-26 19:49:15,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 67 transitions. [2020-10-26 19:49:15,992 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 67 transitions. Word has length 54 [2020-10-26 19:49:15,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:49:15,992 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 67 transitions. [2020-10-26 19:49:15,992 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-26 19:49:15,992 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 67 transitions. [2020-10-26 19:49:15,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-26 19:49:15,993 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:49:15,996 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:49:15,996 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-26 19:49:15,997 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:49:15,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:49:15,997 INFO L82 PathProgramCache]: Analyzing trace with hash -189989161, now seen corresponding path program 17 times [2020-10-26 19:49:15,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:49:15,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1543824788] [2020-10-26 19:49:15,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:49:16,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:49:16,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:16,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:18,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:49:18,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-26 19:49:18,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:49:18,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2142 [2020-10-26 19:49:18,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:49:18,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-26 19:49:18,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:49:18,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 19:49:18,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:49:18,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:49:18,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:49:18,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:18,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:49:18,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:49:18,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:49:18,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:49:18,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:49:18,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:49:18,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:49:18,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:49:18,225 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:49:18,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:49:18,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:49:18,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:19,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:49:19,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-26 19:49:19,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:49:19,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 794 [2020-10-26 19:49:19,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:49:19,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-26 19:49:19,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:49:19,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-26 19:49:19,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:49:19,435 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:49:19,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1543824788] [2020-10-26 19:49:19,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:49:19,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-26 19:49:19,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696879743] [2020-10-26 19:49:19,436 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-26 19:49:19,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:49:19,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-26 19:49:19,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=310, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:49:19,438 INFO L87 Difference]: Start difference. First operand 63 states and 67 transitions. Second operand 23 states. [2020-10-26 19:49:19,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:49:19,822 INFO L93 Difference]: Finished difference Result 86 states and 94 transitions. [2020-10-26 19:49:19,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-26 19:49:19,823 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 56 [2020-10-26 19:49:19,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:49:19,824 INFO L225 Difference]: With dead ends: 86 [2020-10-26 19:49:19,824 INFO L226 Difference]: Without dead ends: 66 [2020-10-26 19:49:19,825 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=227, Invalid=423, Unknown=0, NotChecked=0, Total=650 [2020-10-26 19:49:19,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-26 19:49:19,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2020-10-26 19:49:19,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-26 19:49:19,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2020-10-26 19:49:19,839 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 56 [2020-10-26 19:49:19,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:49:19,839 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2020-10-26 19:49:19,839 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-26 19:49:19,840 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2020-10-26 19:49:19,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-26 19:49:19,840 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:49:19,840 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:49:19,841 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-26 19:49:19,841 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:49:19,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:49:19,842 INFO L82 PathProgramCache]: Analyzing trace with hash -1784844295, now seen corresponding path program 18 times [2020-10-26 19:49:19,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:49:19,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1096247909] [2020-10-26 19:49:19,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:49:19,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:49:19,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:19,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:22,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:49:22,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-26 19:49:22,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:49:22,113 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2245 [2020-10-26 19:49:22,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:49:22,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-26 19:49:22,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:49:22,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-26 19:49:22,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:49:22,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:49:22,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:49:22,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:22,148 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:49:22,148 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:49:22,149 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:49:22,149 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:49:22,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:49:22,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:49:22,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:49:22,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:49:22,149 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:49:22,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:49:22,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:49:22,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:22,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:49:22,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-26 19:49:22,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:49:22,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 562 [2020-10-26 19:49:22,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:49:22,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-26 19:49:22,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:49:22,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-26 19:49:22,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:49:23,146 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:49:23,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1096247909] [2020-10-26 19:49:23,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:49:23,147 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-26 19:49:23,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979771340] [2020-10-26 19:49:23,147 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-26 19:49:23,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:49:23,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-26 19:49:23,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=336, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:49:23,148 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand 24 states. [2020-10-26 19:49:23,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:49:23,563 INFO L93 Difference]: Finished difference Result 88 states and 96 transitions. [2020-10-26 19:49:23,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-26 19:49:23,564 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 58 [2020-10-26 19:49:23,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:49:23,565 INFO L225 Difference]: With dead ends: 88 [2020-10-26 19:49:23,565 INFO L226 Difference]: Without dead ends: 68 [2020-10-26 19:49:23,566 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=248, Invalid=454, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:49:23,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-26 19:49:23,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2020-10-26 19:49:23,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-26 19:49:23,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 71 transitions. [2020-10-26 19:49:23,573 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 71 transitions. Word has length 58 [2020-10-26 19:49:23,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:49:23,573 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 71 transitions. [2020-10-26 19:49:23,573 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-26 19:49:23,574 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 71 transitions. [2020-10-26 19:49:23,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-26 19:49:23,574 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:49:23,575 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:49:23,575 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-26 19:49:23,575 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:49:23,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:49:23,576 INFO L82 PathProgramCache]: Analyzing trace with hash -1137303397, now seen corresponding path program 19 times [2020-10-26 19:49:23,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:49:23,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1529572640] [2020-10-26 19:49:23,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:49:23,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:49:23,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:23,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:25,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:49:25,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-26 19:49:25,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:49:25,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2224 [2020-10-26 19:49:25,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:49:25,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-26 19:49:25,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:49:25,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-26 19:49:25,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:49:25,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:49:25,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:49:25,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:25,867 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:49:25,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:49:25,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:49:25,868 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:49:25,868 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:49:25,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:49:25,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:49:25,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:49:25,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:49:25,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:49:25,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:49:25,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:26,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:49:26,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-26 19:49:26,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:49:26,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 743 [2020-10-26 19:49:26,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:49:26,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-26 19:49:26,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:49:26,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-26 19:49:26,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:49:27,131 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:49:27,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1529572640] [2020-10-26 19:49:27,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:49:27,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-26 19:49:27,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435040040] [2020-10-26 19:49:27,133 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-26 19:49:27,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:49:27,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-26 19:49:27,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=363, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:49:27,134 INFO L87 Difference]: Start difference. First operand 67 states and 71 transitions. Second operand 25 states. [2020-10-26 19:49:27,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:49:27,484 INFO L93 Difference]: Finished difference Result 90 states and 98 transitions. [2020-10-26 19:49:27,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-26 19:49:27,485 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 60 [2020-10-26 19:49:27,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:49:27,486 INFO L225 Difference]: With dead ends: 90 [2020-10-26 19:49:27,486 INFO L226 Difference]: Without dead ends: 70 [2020-10-26 19:49:27,488 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=270, Invalid=486, Unknown=0, NotChecked=0, Total=756 [2020-10-26 19:49:27,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-26 19:49:27,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2020-10-26 19:49:27,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-26 19:49:27,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 73 transitions. [2020-10-26 19:49:27,494 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 73 transitions. Word has length 60 [2020-10-26 19:49:27,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:49:27,494 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 73 transitions. [2020-10-26 19:49:27,495 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-26 19:49:27,495 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 73 transitions. [2020-10-26 19:49:27,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-26 19:49:27,495 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:49:27,495 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:49:27,496 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-26 19:49:27,496 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:49:27,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:49:27,496 INFO L82 PathProgramCache]: Analyzing trace with hash -1620758339, now seen corresponding path program 20 times [2020-10-26 19:49:27,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:49:27,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [619422327] [2020-10-26 19:49:27,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:49:27,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:49:27,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:27,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:29,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:49:29,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-26 19:49:29,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:49:29,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2414 [2020-10-26 19:49:29,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:49:29,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-26 19:49:29,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:49:29,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-26 19:49:29,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:49:29,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:49:29,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:49:29,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:29,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:49:29,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:49:29,985 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:49:29,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:49:29,985 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:49:29,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:49:29,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:49:29,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:49:29,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:49:30,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:49:30,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:49:30,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:30,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:49:30,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-26 19:49:30,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:49:30,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 764 [2020-10-26 19:49:30,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:49:30,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-26 19:49:30,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:49:30,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-26 19:49:30,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:49:31,247 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:49:31,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [619422327] [2020-10-26 19:49:31,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:49:31,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-26 19:49:31,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726326856] [2020-10-26 19:49:31,249 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-26 19:49:31,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:49:31,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-26 19:49:31,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=391, Unknown=0, NotChecked=0, Total=650 [2020-10-26 19:49:31,251 INFO L87 Difference]: Start difference. First operand 69 states and 73 transitions. Second operand 26 states. [2020-10-26 19:49:31,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:49:31,551 INFO L93 Difference]: Finished difference Result 92 states and 100 transitions. [2020-10-26 19:49:31,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-26 19:49:31,552 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 62 [2020-10-26 19:49:31,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:49:31,553 INFO L225 Difference]: With dead ends: 92 [2020-10-26 19:49:31,553 INFO L226 Difference]: Without dead ends: 72 [2020-10-26 19:49:31,554 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=293, Invalid=519, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:49:31,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-26 19:49:31,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2020-10-26 19:49:31,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-26 19:49:31,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2020-10-26 19:49:31,563 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 62 [2020-10-26 19:49:31,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:49:31,563 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2020-10-26 19:49:31,563 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-26 19:49:31,564 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2020-10-26 19:49:31,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-26 19:49:31,564 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:49:31,564 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:49:31,565 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-26 19:49:31,565 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:49:31,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:49:31,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1930477663, now seen corresponding path program 21 times [2020-10-26 19:49:31,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:49:31,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [388265929] [2020-10-26 19:49:31,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:49:31,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:49:31,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:31,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:34,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:49:34,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-26 19:49:34,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:49:34,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2606 [2020-10-26 19:49:34,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:49:34,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-26 19:49:34,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:49:34,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-26 19:49:34,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:49:34,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:49:34,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:49:34,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:34,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:49:34,242 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:49:34,242 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:49:34,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:49:34,242 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:49:34,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:49:34,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:49:34,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:49:34,242 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:49:34,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:49:34,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:49:34,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:35,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:49:35,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-26 19:49:35,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:49:35,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 742 [2020-10-26 19:49:35,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:49:35,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-26 19:49:35,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:49:35,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-26 19:49:35,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:49:36,168 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:49:36,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [388265929] [2020-10-26 19:49:36,174 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:49:36,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-26 19:49:36,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148335644] [2020-10-26 19:49:36,176 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-26 19:49:36,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:49:36,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-26 19:49:36,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=420, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:49:36,187 INFO L87 Difference]: Start difference. First operand 71 states and 75 transitions. Second operand 27 states. [2020-10-26 19:49:36,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:49:36,637 INFO L93 Difference]: Finished difference Result 94 states and 102 transitions. [2020-10-26 19:49:36,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-26 19:49:36,637 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 64 [2020-10-26 19:49:36,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:49:36,638 INFO L225 Difference]: With dead ends: 94 [2020-10-26 19:49:36,638 INFO L226 Difference]: Without dead ends: 74 [2020-10-26 19:49:36,639 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=338, Invalid=532, Unknown=0, NotChecked=0, Total=870 [2020-10-26 19:49:36,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-26 19:49:36,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2020-10-26 19:49:36,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-26 19:49:36,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions. [2020-10-26 19:49:36,645 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 64 [2020-10-26 19:49:36,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:49:36,646 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions. [2020-10-26 19:49:36,646 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-26 19:49:36,646 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions. [2020-10-26 19:49:36,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-26 19:49:36,647 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:49:36,647 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:49:36,647 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-26 19:49:36,647 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:49:36,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:49:36,648 INFO L82 PathProgramCache]: Analyzing trace with hash 169275265, now seen corresponding path program 22 times [2020-10-26 19:49:36,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:49:36,648 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1900909296] [2020-10-26 19:49:36,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:49:36,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:49:36,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:36,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:39,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:49:39,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-26 19:49:39,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:49:39,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2951 [2020-10-26 19:49:39,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:49:39,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-26 19:49:39,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:49:39,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-26 19:49:39,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:49:39,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:49:39,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:49:39,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:39,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:49:39,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:49:39,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:49:39,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:49:39,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:49:39,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:49:39,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:49:39,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:49:39,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:49:39,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:49:39,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:49:39,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:40,433 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:49:40,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-26 19:49:40,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:49:40,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 735 [2020-10-26 19:49:40,434 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:49:40,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-26 19:49:40,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:49:40,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-26 19:49:40,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:49:40,953 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:49:40,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1900909296] [2020-10-26 19:49:40,954 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:49:40,954 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-26 19:49:40,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113237592] [2020-10-26 19:49:40,954 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-26 19:49:40,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:49:40,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-26 19:49:40,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=450, Unknown=0, NotChecked=0, Total=756 [2020-10-26 19:49:40,955 INFO L87 Difference]: Start difference. First operand 73 states and 77 transitions. Second operand 28 states. [2020-10-26 19:49:41,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:49:41,391 INFO L93 Difference]: Finished difference Result 96 states and 104 transitions. [2020-10-26 19:49:41,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-26 19:49:41,392 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 66 [2020-10-26 19:49:41,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:49:41,393 INFO L225 Difference]: With dead ends: 96 [2020-10-26 19:49:41,393 INFO L226 Difference]: Without dead ends: 76 [2020-10-26 19:49:41,394 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=342, Invalid=588, Unknown=0, NotChecked=0, Total=930 [2020-10-26 19:49:41,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-26 19:49:41,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2020-10-26 19:49:41,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-26 19:49:41,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 79 transitions. [2020-10-26 19:49:41,401 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 79 transitions. Word has length 66 [2020-10-26 19:49:41,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:49:41,402 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 79 transitions. [2020-10-26 19:49:41,402 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-26 19:49:41,402 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 79 transitions. [2020-10-26 19:49:41,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-26 19:49:41,403 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:49:41,403 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:49:41,403 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-26 19:49:41,404 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:49:41,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:49:41,404 INFO L82 PathProgramCache]: Analyzing trace with hash -129114589, now seen corresponding path program 23 times [2020-10-26 19:49:41,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:49:41,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1696944055] [2020-10-26 19:49:41,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:49:41,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:49:41,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:41,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:44,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:49:44,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-26 19:49:44,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:49:44,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2828 [2020-10-26 19:49:44,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:49:44,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-26 19:49:44,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:49:44,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-26 19:49:44,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:49:44,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:49:44,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:49:44,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:44,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:49:44,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:49:44,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:49:44,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:49:44,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:49:44,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:49:44,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:49:44,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:49:44,306 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:49:44,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:49:44,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:49:44,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:45,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:49:45,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-26 19:49:45,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:49:45,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 799 [2020-10-26 19:49:45,141 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:49:45,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-26 19:49:45,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:49:45,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-26 19:49:45,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:49:45,670 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:49:45,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1696944055] [2020-10-26 19:49:45,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:49:45,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-26 19:49:45,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391464160] [2020-10-26 19:49:45,671 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-26 19:49:45,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:49:45,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-26 19:49:45,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=481, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:49:45,672 INFO L87 Difference]: Start difference. First operand 75 states and 79 transitions. Second operand 29 states. [2020-10-26 19:49:46,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:49:46,091 INFO L93 Difference]: Finished difference Result 98 states and 106 transitions. [2020-10-26 19:49:46,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-26 19:49:46,091 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 68 [2020-10-26 19:49:46,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:49:46,093 INFO L225 Difference]: With dead ends: 98 [2020-10-26 19:49:46,093 INFO L226 Difference]: Without dead ends: 78 [2020-10-26 19:49:46,094 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=368, Invalid=624, Unknown=0, NotChecked=0, Total=992 [2020-10-26 19:49:46,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-26 19:49:46,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2020-10-26 19:49:46,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-26 19:49:46,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 81 transitions. [2020-10-26 19:49:46,100 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 81 transitions. Word has length 68 [2020-10-26 19:49:46,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:49:46,100 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 81 transitions. [2020-10-26 19:49:46,100 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-26 19:49:46,100 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 81 transitions. [2020-10-26 19:49:46,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-26 19:49:46,101 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:49:46,101 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:49:46,101 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-26 19:49:46,101 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:49:46,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:49:46,102 INFO L82 PathProgramCache]: Analyzing trace with hash 881044549, now seen corresponding path program 24 times [2020-10-26 19:49:46,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:49:46,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1107974402] [2020-10-26 19:49:46,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:49:46,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:49:46,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:46,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:49,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:49:49,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-26 19:49:49,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:49:49,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2918 [2020-10-26 19:49:49,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:49:49,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-26 19:49:49,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:49:49,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-26 19:49:49,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:49:49,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:49:49,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:49:49,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:49,086 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:49:49,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:49:49,087 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:49:49,087 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:49:49,087 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:49:49,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:49:49,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:49:49,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:49:49,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:49:49,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:49:49,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:49:49,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:49,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:49:49,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-26 19:49:49,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:49:49,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 837 [2020-10-26 19:49:49,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:49:49,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-26 19:49:49,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:49:49,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-26 19:49:49,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:49:50,532 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:49:50,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1107974402] [2020-10-26 19:49:50,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:49:50,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-26 19:49:50,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4178558] [2020-10-26 19:49:50,540 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-26 19:49:50,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:49:50,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-26 19:49:50,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=357, Invalid=513, Unknown=0, NotChecked=0, Total=870 [2020-10-26 19:49:50,541 INFO L87 Difference]: Start difference. First operand 77 states and 81 transitions. Second operand 30 states. [2020-10-26 19:49:50,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:49:50,994 INFO L93 Difference]: Finished difference Result 100 states and 108 transitions. [2020-10-26 19:49:50,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-26 19:49:50,995 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 70 [2020-10-26 19:49:50,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:49:50,996 INFO L225 Difference]: With dead ends: 100 [2020-10-26 19:49:50,997 INFO L226 Difference]: Without dead ends: 80 [2020-10-26 19:49:50,998 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=395, Invalid=661, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 19:49:50,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-26 19:49:51,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2020-10-26 19:49:51,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-26 19:49:51,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 83 transitions. [2020-10-26 19:49:51,004 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 83 transitions. Word has length 70 [2020-10-26 19:49:51,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:49:51,005 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 83 transitions. [2020-10-26 19:49:51,005 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-26 19:49:51,005 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 83 transitions. [2020-10-26 19:49:51,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-26 19:49:51,006 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:49:51,006 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:49:51,006 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-26 19:49:51,006 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:49:51,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:49:51,007 INFO L82 PathProgramCache]: Analyzing trace with hash 981367271, now seen corresponding path program 25 times [2020-10-26 19:49:51,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:49:51,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1418060210] [2020-10-26 19:49:51,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:49:51,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:49:51,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:51,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:54,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:49:54,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-26 19:49:54,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:49:54,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3761 [2020-10-26 19:49:54,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:49:54,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-26 19:49:54,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:49:54,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-26 19:49:54,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:49:54,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:49:54,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:49:54,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:54,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:49:54,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:49:54,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:49:54,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:49:54,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:49:54,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:49:54,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:49:54,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:49:54,839 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:49:54,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:49:54,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:49:54,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:55,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:49:55,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-26 19:49:55,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:49:55,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1058 [2020-10-26 19:49:55,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:49:55,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-26 19:49:55,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:49:55,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-26 19:49:55,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:49:57,379 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:49:57,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1418060210] [2020-10-26 19:49:57,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:49:57,380 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-26 19:49:57,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402228640] [2020-10-26 19:49:57,381 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-26 19:49:57,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:49:57,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-26 19:49:57,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=384, Invalid=546, Unknown=0, NotChecked=0, Total=930 [2020-10-26 19:49:57,382 INFO L87 Difference]: Start difference. First operand 79 states and 83 transitions. Second operand 31 states. [2020-10-26 19:49:57,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:49:57,921 INFO L93 Difference]: Finished difference Result 102 states and 110 transitions. [2020-10-26 19:49:57,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-26 19:49:57,922 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 72 [2020-10-26 19:49:57,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:49:57,923 INFO L225 Difference]: With dead ends: 102 [2020-10-26 19:49:57,923 INFO L226 Difference]: Without dead ends: 82 [2020-10-26 19:49:57,924 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=448, Invalid=674, Unknown=0, NotChecked=0, Total=1122 [2020-10-26 19:49:57,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-26 19:49:57,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2020-10-26 19:49:57,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-26 19:49:57,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 85 transitions. [2020-10-26 19:49:57,934 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 85 transitions. Word has length 72 [2020-10-26 19:49:57,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:49:57,935 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 85 transitions. [2020-10-26 19:49:57,935 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-26 19:49:57,935 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 85 transitions. [2020-10-26 19:49:57,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-26 19:49:57,938 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:49:57,938 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:49:57,938 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-26 19:49:57,938 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:49:57,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:49:57,939 INFO L82 PathProgramCache]: Analyzing trace with hash -1392744695, now seen corresponding path program 26 times [2020-10-26 19:49:57,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:49:57,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1643776217] [2020-10-26 19:49:57,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:49:57,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:49:57,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:49:58,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:50:01,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:50:01,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-26 19:50:01,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:50:01,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4008 [2020-10-26 19:50:01,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:50:01,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-26 19:50:01,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:50:01,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-26 19:50:01,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:50:02,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:50:02,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:50:02,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:50:02,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:50:02,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:50:02,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:50:02,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:50:02,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:50:02,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:50:02,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:50:02,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:50:02,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:50:02,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:50:02,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:50:02,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:50:03,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:50:03,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-26 19:50:03,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:50:03,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1146 [2020-10-26 19:50:03,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:50:03,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-26 19:50:03,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:50:03,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-26 19:50:03,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:50:03,914 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:50:03,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1643776217] [2020-10-26 19:50:03,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:50:03,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-26 19:50:03,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075466026] [2020-10-26 19:50:03,915 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-26 19:50:03,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:50:03,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-26 19:50:03,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=412, Invalid=580, Unknown=0, NotChecked=0, Total=992 [2020-10-26 19:50:03,917 INFO L87 Difference]: Start difference. First operand 81 states and 85 transitions. Second operand 32 states. [2020-10-26 19:50:04,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:50:04,414 INFO L93 Difference]: Finished difference Result 104 states and 112 transitions. [2020-10-26 19:50:04,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-26 19:50:04,415 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 74 [2020-10-26 19:50:04,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:50:04,416 INFO L225 Difference]: With dead ends: 104 [2020-10-26 19:50:04,416 INFO L226 Difference]: Without dead ends: 84 [2020-10-26 19:50:04,418 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=452, Invalid=738, Unknown=0, NotChecked=0, Total=1190 [2020-10-26 19:50:04,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-26 19:50:04,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2020-10-26 19:50:04,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-26 19:50:04,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 87 transitions. [2020-10-26 19:50:04,424 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 87 transitions. Word has length 74 [2020-10-26 19:50:04,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:50:04,425 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 87 transitions. [2020-10-26 19:50:04,425 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-26 19:50:04,425 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 87 transitions. [2020-10-26 19:50:04,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-26 19:50:04,426 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:50:04,426 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:50:04,426 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-26 19:50:04,426 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:50:04,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:50:04,427 INFO L82 PathProgramCache]: Analyzing trace with hash 2008257451, now seen corresponding path program 27 times [2020-10-26 19:50:04,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:50:04,427 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2085551570] [2020-10-26 19:50:04,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:50:04,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:50:04,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:50:04,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:50:09,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:50:09,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-26 19:50:09,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:50:09,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-26 19:50:09,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:50:09,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-26 19:50:09,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:50:09,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-26 19:50:09,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:50:09,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:50:09,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:50:09,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:50:09,509 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:50:09,510 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:50:09,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:50:09,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:50:09,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:50:09,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:50:09,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:50:09,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:50:09,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:50:09,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:50:09,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:50:09,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:50:10,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:50:10,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-26 19:50:10,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:50:10,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1159 [2020-10-26 19:50:10,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:50:10,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-26 19:50:10,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:50:10,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-26 19:50:10,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:50:12,321 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:50:12,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2085551570] [2020-10-26 19:50:12,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:50:12,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-26 19:50:12,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798486801] [2020-10-26 19:50:12,322 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-26 19:50:12,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:50:12,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-26 19:50:12,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=441, Invalid=615, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 19:50:12,323 INFO L87 Difference]: Start difference. First operand 83 states and 87 transitions. Second operand 33 states. [2020-10-26 19:50:12,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:50:12,842 INFO L93 Difference]: Finished difference Result 106 states and 114 transitions. [2020-10-26 19:50:12,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-26 19:50:12,842 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 76 [2020-10-26 19:50:12,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:50:12,844 INFO L225 Difference]: With dead ends: 106 [2020-10-26 19:50:12,844 INFO L226 Difference]: Without dead ends: 86 [2020-10-26 19:50:12,845 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=509, Invalid=751, Unknown=0, NotChecked=0, Total=1260 [2020-10-26 19:50:12,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-26 19:50:12,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2020-10-26 19:50:12,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-26 19:50:12,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 89 transitions. [2020-10-26 19:50:12,852 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 89 transitions. Word has length 76 [2020-10-26 19:50:12,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:50:12,852 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 89 transitions. [2020-10-26 19:50:12,852 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-26 19:50:12,853 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 89 transitions. [2020-10-26 19:50:12,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-26 19:50:12,853 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:50:12,854 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:50:12,854 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-26 19:50:12,854 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:50:12,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:50:12,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1901207501, now seen corresponding path program 28 times [2020-10-26 19:50:12,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:50:12,855 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2106772889] [2020-10-26 19:50:12,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:50:12,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:50:12,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:50:12,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:50:17,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:50:17,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-26 19:50:17,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:50:17,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4377 [2020-10-26 19:50:17,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:50:17,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-26 19:50:17,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:50:17,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-26 19:50:17,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:50:17,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:50:17,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:50:17,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:50:17,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:50:17,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:50:17,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:50:17,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:50:17,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:50:17,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:50:17,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:50:17,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:50:17,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:50:17,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:50:17,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:50:17,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:50:18,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:50:18,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-26 19:50:18,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:50:18,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1194 [2020-10-26 19:50:18,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:50:18,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-26 19:50:18,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:50:18,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-26 19:50:18,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:50:19,361 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:50:19,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2106772889] [2020-10-26 19:50:19,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:50:19,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-26 19:50:19,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403257944] [2020-10-26 19:50:19,362 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-26 19:50:19,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:50:19,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-26 19:50:19,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=471, Invalid=651, Unknown=0, NotChecked=0, Total=1122 [2020-10-26 19:50:19,363 INFO L87 Difference]: Start difference. First operand 85 states and 89 transitions. Second operand 34 states. [2020-10-26 19:50:19,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:50:19,879 INFO L93 Difference]: Finished difference Result 108 states and 116 transitions. [2020-10-26 19:50:19,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-26 19:50:19,880 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 78 [2020-10-26 19:50:19,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:50:19,881 INFO L225 Difference]: With dead ends: 108 [2020-10-26 19:50:19,881 INFO L226 Difference]: Without dead ends: 88 [2020-10-26 19:50:19,883 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=513, Invalid=819, Unknown=0, NotChecked=0, Total=1332 [2020-10-26 19:50:19,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-26 19:50:19,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2020-10-26 19:50:19,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-26 19:50:19,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 91 transitions. [2020-10-26 19:50:19,890 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 91 transitions. Word has length 78 [2020-10-26 19:50:19,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:50:19,890 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 91 transitions. [2020-10-26 19:50:19,890 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-26 19:50:19,890 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 91 transitions. [2020-10-26 19:50:19,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-26 19:50:19,891 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:50:19,891 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:50:19,892 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-26 19:50:19,892 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:50:19,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:50:19,892 INFO L82 PathProgramCache]: Analyzing trace with hash 2105420655, now seen corresponding path program 29 times [2020-10-26 19:50:19,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:50:19,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [430846320] [2020-10-26 19:50:19,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:50:19,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:50:19,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:50:19,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:50:24,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:50:24,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-26 19:50:24,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:50:24,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4697 [2020-10-26 19:50:24,626 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:50:24,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-26 19:50:24,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:50:24,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-26 19:50:24,627 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:50:24,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:50:24,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:50:24,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:50:24,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:50:24,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:50:24,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:50:24,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:50:24,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:50:24,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:50:24,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:50:24,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:50:24,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:50:24,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:50:24,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:50:24,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:50:26,068 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:50:26,068 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-26 19:50:26,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:50:26,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1358 [2020-10-26 19:50:26,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:50:26,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-26 19:50:26,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:50:26,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-26 19:50:26,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:50:26,924 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:50:26,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [430846320] [2020-10-26 19:50:26,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:50:26,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-26 19:50:26,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365830407] [2020-10-26 19:50:26,925 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-26 19:50:26,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:50:26,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-26 19:50:26,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=502, Invalid=688, Unknown=0, NotChecked=0, Total=1190 [2020-10-26 19:50:26,926 INFO L87 Difference]: Start difference. First operand 87 states and 91 transitions. Second operand 35 states. [2020-10-26 19:50:27,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:50:27,486 INFO L93 Difference]: Finished difference Result 110 states and 118 transitions. [2020-10-26 19:50:27,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-26 19:50:27,488 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 80 [2020-10-26 19:50:27,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:50:27,489 INFO L225 Difference]: With dead ends: 110 [2020-10-26 19:50:27,489 INFO L226 Difference]: Without dead ends: 90 [2020-10-26 19:50:27,490 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=545, Invalid=861, Unknown=0, NotChecked=0, Total=1406 [2020-10-26 19:50:27,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-26 19:50:27,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2020-10-26 19:50:27,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-26 19:50:27,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 93 transitions. [2020-10-26 19:50:27,496 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 93 transitions. Word has length 80 [2020-10-26 19:50:27,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:50:27,497 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 93 transitions. [2020-10-26 19:50:27,497 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-26 19:50:27,497 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 93 transitions. [2020-10-26 19:50:27,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-26 19:50:27,498 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:50:27,498 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:50:27,499 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-26 19:50:27,499 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:50:27,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:50:27,500 INFO L82 PathProgramCache]: Analyzing trace with hash 785766033, now seen corresponding path program 30 times [2020-10-26 19:50:27,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:50:27,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1377930003] [2020-10-26 19:50:27,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:50:27,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:50:27,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:50:27,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:50:32,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:50:32,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-26 19:50:32,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:50:32,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4593 [2020-10-26 19:50:32,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:50:32,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-26 19:50:32,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:50:32,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-26 19:50:32,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:50:32,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:50:32,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:50:32,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:50:32,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:50:32,179 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:50:32,179 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:50:32,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:50:32,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:50:32,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:50:32,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:50:32,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:50:32,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:50:32,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:50:32,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:50:32,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:50:33,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:50:33,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-26 19:50:33,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:50:33,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1462 [2020-10-26 19:50:33,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:50:33,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-26 19:50:33,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:50:33,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-26 19:50:33,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:50:34,558 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:50:34,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1377930003] [2020-10-26 19:50:34,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:50:34,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-26 19:50:34,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810687009] [2020-10-26 19:50:34,560 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-26 19:50:34,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:50:34,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-26 19:50:34,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=534, Invalid=726, Unknown=0, NotChecked=0, Total=1260 [2020-10-26 19:50:34,561 INFO L87 Difference]: Start difference. First operand 89 states and 93 transitions. Second operand 36 states. [2020-10-26 19:50:35,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:50:35,137 INFO L93 Difference]: Finished difference Result 112 states and 120 transitions. [2020-10-26 19:50:35,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-26 19:50:35,138 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 82 [2020-10-26 19:50:35,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:50:35,139 INFO L225 Difference]: With dead ends: 112 [2020-10-26 19:50:35,139 INFO L226 Difference]: Without dead ends: 92 [2020-10-26 19:50:35,140 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=578, Invalid=904, Unknown=0, NotChecked=0, Total=1482 [2020-10-26 19:50:35,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-26 19:50:35,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2020-10-26 19:50:35,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-26 19:50:35,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 95 transitions. [2020-10-26 19:50:35,153 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 95 transitions. Word has length 82 [2020-10-26 19:50:35,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:50:35,154 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 95 transitions. [2020-10-26 19:50:35,154 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-26 19:50:35,154 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 95 transitions. [2020-10-26 19:50:35,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-26 19:50:35,155 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:50:35,157 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:50:35,157 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-26 19:50:35,157 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:50:35,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:50:35,158 INFO L82 PathProgramCache]: Analyzing trace with hash -386973389, now seen corresponding path program 31 times [2020-10-26 19:50:35,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:50:35,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1257170846] [2020-10-26 19:50:35,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:50:35,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:50:35,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:50:35,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:50:40,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:50:40,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-26 19:50:40,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:50:40,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-10-26 19:50:40,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:50:40,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-26 19:50:40,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:50:40,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-26 19:50:40,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:50:40,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:50:40,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:50:40,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:50:40,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:50:40,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:50:40,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:50:40,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:50:40,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:50:40,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:50:40,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:50:40,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:50:40,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:50:40,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:50:40,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:50:40,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:50:41,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:50:41,858 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-26 19:50:41,858 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:50:41,859 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1533 [2020-10-26 19:50:41,859 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:50:41,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-26 19:50:41,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:50:41,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-26 19:50:41,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:50:42,816 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:50:42,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1257170846] [2020-10-26 19:50:42,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:50:42,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-26 19:50:42,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805828726] [2020-10-26 19:50:42,818 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-26 19:50:42,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:50:42,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-26 19:50:42,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=567, Invalid=765, Unknown=0, NotChecked=0, Total=1332 [2020-10-26 19:50:42,819 INFO L87 Difference]: Start difference. First operand 91 states and 95 transitions. Second operand 37 states. [2020-10-26 19:50:43,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:50:43,293 INFO L93 Difference]: Finished difference Result 114 states and 122 transitions. [2020-10-26 19:50:43,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-26 19:50:43,293 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 84 [2020-10-26 19:50:43,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:50:43,295 INFO L225 Difference]: With dead ends: 114 [2020-10-26 19:50:43,295 INFO L226 Difference]: Without dead ends: 94 [2020-10-26 19:50:43,296 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=612, Invalid=948, Unknown=0, NotChecked=0, Total=1560 [2020-10-26 19:50:43,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-26 19:50:43,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2020-10-26 19:50:43,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-26 19:50:43,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 97 transitions. [2020-10-26 19:50:43,302 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 97 transitions. Word has length 84 [2020-10-26 19:50:43,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:50:43,302 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 97 transitions. [2020-10-26 19:50:43,303 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-26 19:50:43,303 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 97 transitions. [2020-10-26 19:50:43,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-26 19:50:43,303 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:50:43,304 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:50:43,304 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-26 19:50:43,304 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:50:43,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:50:43,304 INFO L82 PathProgramCache]: Analyzing trace with hash -2108126379, now seen corresponding path program 32 times [2020-10-26 19:50:43,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:50:43,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1982005134] [2020-10-26 19:50:43,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:50:43,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:50:43,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:50:43,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:50:48,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:50:48,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-26 19:50:48,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:50:48,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-26 19:50:48,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:50:48,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-26 19:50:48,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:50:48,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-26 19:50:48,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:50:48,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:50:48,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:50:48,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:50:48,413 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:50:48,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:50:48,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:50:48,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:50:48,414 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:50:48,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:50:48,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:50:48,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:50:48,414 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:50:48,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:50:48,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:50:48,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:50:50,143 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:50:50,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-26 19:50:50,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:50:50,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1689 [2020-10-26 19:50:50,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:50:50,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-26 19:50:50,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:50:50,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-26 19:50:50,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:50:52,283 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:50:52,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1982005134] [2020-10-26 19:50:52,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:50:52,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-26 19:50:52,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209730998] [2020-10-26 19:50:52,284 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-26 19:50:52,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:50:52,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-26 19:50:52,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=601, Invalid=805, Unknown=0, NotChecked=0, Total=1406 [2020-10-26 19:50:52,286 INFO L87 Difference]: Start difference. First operand 93 states and 97 transitions. Second operand 38 states. [2020-10-26 19:50:52,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:50:52,961 INFO L93 Difference]: Finished difference Result 116 states and 124 transitions. [2020-10-26 19:50:52,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-26 19:50:52,961 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 86 [2020-10-26 19:50:52,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:50:52,963 INFO L225 Difference]: With dead ends: 116 [2020-10-26 19:50:52,963 INFO L226 Difference]: Without dead ends: 96 [2020-10-26 19:50:52,964 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=679, Invalid=961, Unknown=0, NotChecked=0, Total=1640 [2020-10-26 19:50:52,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-26 19:50:52,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2020-10-26 19:50:52,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-26 19:50:52,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 99 transitions. [2020-10-26 19:50:52,971 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 99 transitions. Word has length 86 [2020-10-26 19:50:52,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:50:52,972 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 99 transitions. [2020-10-26 19:50:52,972 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-26 19:50:52,972 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 99 transitions. [2020-10-26 19:50:52,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-26 19:50:52,973 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:50:52,973 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:50:52,973 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-26 19:50:52,973 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:50:52,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:50:52,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1721226487, now seen corresponding path program 33 times [2020-10-26 19:50:52,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:50:52,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2071940499] [2020-10-26 19:50:52,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:50:53,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:50:53,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:50:53,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:50:58,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:50:58,087 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-26 19:50:58,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:50:58,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5076 [2020-10-26 19:50:58,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:50:58,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-26 19:50:58,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:50:58,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-26 19:50:58,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:50:58,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:50:58,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:50:58,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:50:58,166 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:50:58,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:50:58,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:50:58,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:50:58,167 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:50:58,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:50:58,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:50:58,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:50:58,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:50:58,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:50:58,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:50:58,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:00,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:51:00,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-26 19:51:00,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:51:00,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1992 [2020-10-26 19:51:00,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:51:00,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-26 19:51:00,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:51:00,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-26 19:51:00,223 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-26 19:51:02,410 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:51:02,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2071940499] [2020-10-26 19:51:02,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:51:02,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-26 19:51:02,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533343844] [2020-10-26 19:51:02,411 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-26 19:51:02,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:51:02,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-26 19:51:02,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=636, Invalid=846, Unknown=0, NotChecked=0, Total=1482 [2020-10-26 19:51:02,412 INFO L87 Difference]: Start difference. First operand 95 states and 99 transitions. Second operand 39 states. [2020-10-26 19:51:03,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:51:03,085 INFO L93 Difference]: Finished difference Result 118 states and 126 transitions. [2020-10-26 19:51:03,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-26 19:51:03,086 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 88 [2020-10-26 19:51:03,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:51:03,087 INFO L225 Difference]: With dead ends: 118 [2020-10-26 19:51:03,087 INFO L226 Difference]: Without dead ends: 98 [2020-10-26 19:51:03,089 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=716, Invalid=1006, Unknown=0, NotChecked=0, Total=1722 [2020-10-26 19:51:03,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-26 19:51:03,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2020-10-26 19:51:03,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-26 19:51:03,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 101 transitions. [2020-10-26 19:51:03,097 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 101 transitions. Word has length 88 [2020-10-26 19:51:03,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:51:03,097 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 101 transitions. [2020-10-26 19:51:03,097 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-26 19:51:03,097 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 101 transitions. [2020-10-26 19:51:03,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-26 19:51:03,098 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:51:03,098 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:51:03,099 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-26 19:51:03,099 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:51:03,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:51:03,099 INFO L82 PathProgramCache]: Analyzing trace with hash 942358041, now seen corresponding path program 34 times [2020-10-26 19:51:03,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:51:03,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [899509995] [2020-10-26 19:51:03,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:51:03,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:51:03,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:03,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:08,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:51:08,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-26 19:51:08,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:51:08,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-10-26 19:51:08,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:51:08,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-26 19:51:08,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:51:08,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-26 19:51:08,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:51:08,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:51:08,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:51:08,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:08,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:51:08,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:51:08,242 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:51:08,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:51:08,242 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:51:08,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:51:08,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:51:08,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:51:08,243 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:51:08,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:51:08,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:51:08,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:10,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:51:10,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-26 19:51:10,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:51:10,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2159 [2020-10-26 19:51:10,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:51:10,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-26 19:51:10,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:51:10,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-26 19:51:10,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:51:12,816 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:51:12,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [899509995] [2020-10-26 19:51:12,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:51:12,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-26 19:51:12,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989450573] [2020-10-26 19:51:12,817 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-26 19:51:12,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:51:12,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-26 19:51:12,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=672, Invalid=888, Unknown=0, NotChecked=0, Total=1560 [2020-10-26 19:51:12,818 INFO L87 Difference]: Start difference. First operand 97 states and 101 transitions. Second operand 40 states. [2020-10-26 19:51:13,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:51:13,386 INFO L93 Difference]: Finished difference Result 120 states and 128 transitions. [2020-10-26 19:51:13,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-26 19:51:13,387 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 90 [2020-10-26 19:51:13,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:51:13,388 INFO L225 Difference]: With dead ends: 120 [2020-10-26 19:51:13,388 INFO L226 Difference]: Without dead ends: 100 [2020-10-26 19:51:13,390 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=754, Invalid=1052, Unknown=0, NotChecked=0, Total=1806 [2020-10-26 19:51:13,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-26 19:51:13,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2020-10-26 19:51:13,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-26 19:51:13,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 103 transitions. [2020-10-26 19:51:13,396 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 103 transitions. Word has length 90 [2020-10-26 19:51:13,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:51:13,396 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 103 transitions. [2020-10-26 19:51:13,396 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-26 19:51:13,396 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 103 transitions. [2020-10-26 19:51:13,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-26 19:51:13,397 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:51:13,398 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:51:13,398 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-26 19:51:13,398 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:51:13,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:51:13,399 INFO L82 PathProgramCache]: Analyzing trace with hash -225909061, now seen corresponding path program 35 times [2020-10-26 19:51:13,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:51:13,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1598576789] [2020-10-26 19:51:13,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:51:13,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:51:13,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:13,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:18,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:51:18,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-26 19:51:18,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:51:18,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5039 [2020-10-26 19:51:18,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:51:18,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-26 19:51:18,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:51:18,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-26 19:51:18,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:51:18,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:51:18,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:51:18,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:18,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:51:18,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:51:18,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:51:18,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:51:18,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:51:18,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:51:18,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:51:18,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:51:18,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:51:18,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:51:18,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:51:18,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:20,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:51:20,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-26 19:51:20,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:51:20,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2232 [2020-10-26 19:51:20,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:51:20,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-26 19:51:20,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:51:20,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-26 19:51:20,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:51:23,262 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:51:23,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1598576789] [2020-10-26 19:51:23,263 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:51:23,263 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-26 19:51:23,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436004772] [2020-10-26 19:51:23,264 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-26 19:51:23,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:51:23,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-26 19:51:23,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=709, Invalid=931, Unknown=0, NotChecked=0, Total=1640 [2020-10-26 19:51:23,265 INFO L87 Difference]: Start difference. First operand 99 states and 103 transitions. Second operand 41 states. [2020-10-26 19:51:23,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:51:23,834 INFO L93 Difference]: Finished difference Result 122 states and 130 transitions. [2020-10-26 19:51:23,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-26 19:51:23,834 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 92 [2020-10-26 19:51:23,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:51:23,836 INFO L225 Difference]: With dead ends: 122 [2020-10-26 19:51:23,836 INFO L226 Difference]: Without dead ends: 102 [2020-10-26 19:51:23,837 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=793, Invalid=1099, Unknown=0, NotChecked=0, Total=1892 [2020-10-26 19:51:23,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-26 19:51:23,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2020-10-26 19:51:23,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-26 19:51:23,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 105 transitions. [2020-10-26 19:51:23,843 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 105 transitions. Word has length 92 [2020-10-26 19:51:23,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:51:23,844 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 105 transitions. [2020-10-26 19:51:23,844 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-26 19:51:23,844 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 105 transitions. [2020-10-26 19:51:23,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-26 19:51:23,845 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:51:23,845 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:51:23,845 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-26 19:51:23,845 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:51:23,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:51:23,846 INFO L82 PathProgramCache]: Analyzing trace with hash -1944129827, now seen corresponding path program 36 times [2020-10-26 19:51:23,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:51:23,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [231076059] [2020-10-26 19:51:23,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:51:23,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:51:23,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:23,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:28,928 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:51:28,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-26 19:51:28,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:51:28,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5042 [2020-10-26 19:51:28,929 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:51:28,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-26 19:51:28,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:51:28,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-26 19:51:28,929 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:51:28,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:51:28,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:51:28,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:28,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:51:28,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:51:28,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:51:28,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:51:28,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:51:28,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:51:28,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:51:28,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:51:28,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:51:28,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:51:29,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:51:29,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:31,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:51:31,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-26 19:51:31,225 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:51:31,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2197 [2020-10-26 19:51:31,226 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:51:31,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-26 19:51:31,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:51:31,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-26 19:51:31,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:51:33,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:51:33,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [231076059] [2020-10-26 19:51:33,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:51:33,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-26 19:51:33,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855590260] [2020-10-26 19:51:33,868 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-26 19:51:33,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:51:33,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-26 19:51:33,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=747, Invalid=975, Unknown=0, NotChecked=0, Total=1722 [2020-10-26 19:51:33,870 INFO L87 Difference]: Start difference. First operand 101 states and 105 transitions. Second operand 42 states. [2020-10-26 19:51:34,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:51:34,502 INFO L93 Difference]: Finished difference Result 124 states and 132 transitions. [2020-10-26 19:51:34,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-26 19:51:34,502 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 94 [2020-10-26 19:51:34,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:51:34,504 INFO L225 Difference]: With dead ends: 124 [2020-10-26 19:51:34,504 INFO L226 Difference]: Without dead ends: 104 [2020-10-26 19:51:34,505 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=833, Invalid=1147, Unknown=0, NotChecked=0, Total=1980 [2020-10-26 19:51:34,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-26 19:51:34,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2020-10-26 19:51:34,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-26 19:51:34,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 107 transitions. [2020-10-26 19:51:34,511 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 107 transitions. Word has length 94 [2020-10-26 19:51:34,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:51:34,512 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 107 transitions. [2020-10-26 19:51:34,512 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-26 19:51:34,512 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 107 transitions. [2020-10-26 19:51:34,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-26 19:51:34,513 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:51:34,513 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:51:34,513 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-26 19:51:34,513 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:51:34,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:51:34,514 INFO L82 PathProgramCache]: Analyzing trace with hash 408123007, now seen corresponding path program 37 times [2020-10-26 19:51:34,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:51:34,514 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [20685664] [2020-10-26 19:51:34,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:51:34,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:51:34,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:34,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:39,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:51:39,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-26 19:51:39,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:51:39,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-26 19:51:39,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:51:39,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-26 19:51:39,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:51:39,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-26 19:51:39,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:51:39,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:51:39,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:51:39,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:39,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:51:39,611 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:51:39,611 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:51:39,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:51:39,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:51:39,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:51:39,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:51:39,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:51:39,612 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:51:39,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:51:39,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:51:39,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:42,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:51:42,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-26 19:51:42,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:51:42,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2440 [2020-10-26 19:51:42,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:51:42,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-26 19:51:42,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:51:42,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-26 19:51:42,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:51:43,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:51:43,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [20685664] [2020-10-26 19:51:43,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:51:43,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-26 19:51:43,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843709126] [2020-10-26 19:51:43,422 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-26 19:51:43,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:51:43,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-26 19:51:43,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=786, Invalid=1020, Unknown=0, NotChecked=0, Total=1806 [2020-10-26 19:51:43,423 INFO L87 Difference]: Start difference. First operand 103 states and 107 transitions. Second operand 43 states. [2020-10-26 19:51:44,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:51:44,091 INFO L93 Difference]: Finished difference Result 126 states and 134 transitions. [2020-10-26 19:51:44,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-26 19:51:44,092 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 96 [2020-10-26 19:51:44,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:51:44,093 INFO L225 Difference]: With dead ends: 126 [2020-10-26 19:51:44,093 INFO L226 Difference]: Without dead ends: 106 [2020-10-26 19:51:44,094 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=837, Invalid=1233, Unknown=0, NotChecked=0, Total=2070 [2020-10-26 19:51:44,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-26 19:51:44,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2020-10-26 19:51:44,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-26 19:51:44,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 109 transitions. [2020-10-26 19:51:44,101 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 109 transitions. Word has length 96 [2020-10-26 19:51:44,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:51:44,102 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 109 transitions. [2020-10-26 19:51:44,102 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-26 19:51:44,102 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 109 transitions. [2020-10-26 19:51:44,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-26 19:51:44,103 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:51:44,103 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:51:44,103 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-26 19:51:44,103 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:51:44,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:51:44,104 INFO L82 PathProgramCache]: Analyzing trace with hash 1770298785, now seen corresponding path program 38 times [2020-10-26 19:51:44,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:51:44,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1989483338] [2020-10-26 19:51:44,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:51:44,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:51:44,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:44,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:49,148 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:51:49,148 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-26 19:51:49,148 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:51:49,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-26 19:51:49,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:51:49,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-26 19:51:49,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:51:49,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-26 19:51:49,149 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:51:49,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:51:49,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:51:49,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:49,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:51:49,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:51:49,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:51:49,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:51:49,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:51:49,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:51:49,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:51:49,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:51:49,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:51:49,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:51:49,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:51:49,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:51,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:51:51,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-26 19:51:51,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:51:51,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2421 [2020-10-26 19:51:51,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:51:51,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-26 19:51:51,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:51:51,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-26 19:51:51,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:51:53,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:51:53,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1989483338] [2020-10-26 19:51:53,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:51:53,044 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-26 19:51:53,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746635896] [2020-10-26 19:51:53,044 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-26 19:51:53,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:51:53,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-26 19:51:53,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=826, Invalid=1066, Unknown=0, NotChecked=0, Total=1892 [2020-10-26 19:51:53,045 INFO L87 Difference]: Start difference. First operand 105 states and 109 transitions. Second operand 44 states. [2020-10-26 19:51:53,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:51:53,486 INFO L93 Difference]: Finished difference Result 128 states and 136 transitions. [2020-10-26 19:51:53,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-26 19:51:53,487 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 98 [2020-10-26 19:51:53,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:51:53,488 INFO L225 Difference]: With dead ends: 128 [2020-10-26 19:51:53,488 INFO L226 Difference]: Without dead ends: 108 [2020-10-26 19:51:53,490 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=878, Invalid=1284, Unknown=0, NotChecked=0, Total=2162 [2020-10-26 19:51:53,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-26 19:51:53,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2020-10-26 19:51:53,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-26 19:51:53,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 111 transitions. [2020-10-26 19:51:53,495 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 111 transitions. Word has length 98 [2020-10-26 19:51:53,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:51:53,496 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 111 transitions. [2020-10-26 19:51:53,496 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-26 19:51:53,496 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 111 transitions. [2020-10-26 19:51:53,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-26 19:51:53,497 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:51:53,497 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:51:53,497 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-26 19:51:53,497 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:51:53,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:51:53,498 INFO L82 PathProgramCache]: Analyzing trace with hash 856196163, now seen corresponding path program 39 times [2020-10-26 19:51:53,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:51:53,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1558145796] [2020-10-26 19:51:53,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:51:53,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:51:53,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:53,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:58,540 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:51:58,540 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-26 19:51:58,540 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:51:58,540 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:51:58,540 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:51:58,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-26 19:51:58,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:51:58,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-26 19:51:58,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:51:58,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:51:58,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:51:58,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:51:58,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:51:58,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:51:58,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:51:58,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:51:58,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:51:58,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:51:58,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:51:58,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:51:58,587 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:51:58,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:51:58,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:51:58,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:01,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:01,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-26 19:52:01,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:52:01,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2605 [2020-10-26 19:52:01,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:01,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-26 19:52:01,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:52:01,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-26 19:52:01,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:52:02,678 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:52:02,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1558145796] [2020-10-26 19:52:02,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:52:02,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-26 19:52:02,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665105193] [2020-10-26 19:52:02,679 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-26 19:52:02,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:52:02,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-26 19:52:02,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=867, Invalid=1113, Unknown=0, NotChecked=0, Total=1980 [2020-10-26 19:52:02,680 INFO L87 Difference]: Start difference. First operand 107 states and 111 transitions. Second operand 45 states. [2020-10-26 19:52:03,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:52:03,360 INFO L93 Difference]: Finished difference Result 130 states and 138 transitions. [2020-10-26 19:52:03,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-26 19:52:03,361 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 100 [2020-10-26 19:52:03,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:52:03,362 INFO L225 Difference]: With dead ends: 130 [2020-10-26 19:52:03,362 INFO L226 Difference]: Without dead ends: 110 [2020-10-26 19:52:03,363 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=920, Invalid=1336, Unknown=0, NotChecked=0, Total=2256 [2020-10-26 19:52:03,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-26 19:52:03,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2020-10-26 19:52:03,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-26 19:52:03,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 113 transitions. [2020-10-26 19:52:03,368 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 113 transitions. Word has length 100 [2020-10-26 19:52:03,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:52:03,369 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 113 transitions. [2020-10-26 19:52:03,369 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-26 19:52:03,369 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 113 transitions. [2020-10-26 19:52:03,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-26 19:52:03,371 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:52:03,371 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:52:03,371 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-26 19:52:03,371 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:52:03,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:52:03,371 INFO L82 PathProgramCache]: Analyzing trace with hash -1423095195, now seen corresponding path program 40 times [2020-10-26 19:52:03,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:52:03,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [488181595] [2020-10-26 19:52:03,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:52:03,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:03,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:03,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:08,476 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:08,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-26 19:52:08,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:52:08,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5070 [2020-10-26 19:52:08,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:08,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-26 19:52:08,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:52:08,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-26 19:52:08,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:52:08,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:52:08,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:08,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:08,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:08,525 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:52:08,525 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:52:08,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:52:08,525 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:08,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:52:08,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:52:08,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:52:08,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:52:08,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:52:08,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:08,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:11,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:11,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-26 19:52:11,373 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:52:11,373 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2802 [2020-10-26 19:52:11,373 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:11,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-26 19:52:11,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:52:11,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-26 19:52:11,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:52:12,893 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:52:12,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [488181595] [2020-10-26 19:52:12,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:52:12,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-26 19:52:12,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699630420] [2020-10-26 19:52:12,894 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-26 19:52:12,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:52:12,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-26 19:52:12,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=909, Invalid=1161, Unknown=0, NotChecked=0, Total=2070 [2020-10-26 19:52:12,895 INFO L87 Difference]: Start difference. First operand 109 states and 113 transitions. Second operand 46 states. [2020-10-26 19:52:13,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:52:13,429 INFO L93 Difference]: Finished difference Result 132 states and 140 transitions. [2020-10-26 19:52:13,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-26 19:52:13,430 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 102 [2020-10-26 19:52:13,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:52:13,431 INFO L225 Difference]: With dead ends: 132 [2020-10-26 19:52:13,431 INFO L226 Difference]: Without dead ends: 112 [2020-10-26 19:52:13,432 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=963, Invalid=1389, Unknown=0, NotChecked=0, Total=2352 [2020-10-26 19:52:13,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-26 19:52:13,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2020-10-26 19:52:13,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-26 19:52:13,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 115 transitions. [2020-10-26 19:52:13,437 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 115 transitions. Word has length 102 [2020-10-26 19:52:13,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:52:13,437 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 115 transitions. [2020-10-26 19:52:13,437 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-26 19:52:13,437 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 115 transitions. [2020-10-26 19:52:13,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-26 19:52:13,438 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:52:13,438 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:52:13,438 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-26 19:52:13,438 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:52:13,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:52:13,439 INFO L82 PathProgramCache]: Analyzing trace with hash -1388769273, now seen corresponding path program 41 times [2020-10-26 19:52:13,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:52:13,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [388898862] [2020-10-26 19:52:13,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:52:13,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:13,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:13,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:18,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:18,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-26 19:52:18,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:52:18,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-26 19:52:18,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:18,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-26 19:52:18,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:52:18,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-26 19:52:18,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:52:18,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:52:18,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:18,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:18,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:18,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:52:18,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:52:18,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:52:18,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:18,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:52:18,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:52:18,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:52:18,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:52:18,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:52:18,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:18,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:21,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:21,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-26 19:52:21,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:52:21,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3030 [2020-10-26 19:52:21,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:21,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-26 19:52:21,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-26 19:52:21,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-26 19:52:21,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:52:23,225 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:52:23,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [388898862] [2020-10-26 19:52:23,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:52:23,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-26 19:52:23,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053682565] [2020-10-26 19:52:23,226 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-26 19:52:23,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:52:23,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-26 19:52:23,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=952, Invalid=1210, Unknown=0, NotChecked=0, Total=2162 [2020-10-26 19:52:23,227 INFO L87 Difference]: Start difference. First operand 111 states and 115 transitions. Second operand 47 states. [2020-10-26 19:52:23,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:52:23,693 INFO L93 Difference]: Finished difference Result 134 states and 142 transitions. [2020-10-26 19:52:23,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-26 19:52:23,694 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 104 [2020-10-26 19:52:23,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:52:23,696 INFO L225 Difference]: With dead ends: 134 [2020-10-26 19:52:23,696 INFO L226 Difference]: Without dead ends: 114 [2020-10-26 19:52:23,697 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1007, Invalid=1443, Unknown=0, NotChecked=0, Total=2450 [2020-10-26 19:52:23,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-26 19:52:23,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2020-10-26 19:52:23,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-26 19:52:23,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 117 transitions. [2020-10-26 19:52:23,705 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 117 transitions. Word has length 104 [2020-10-26 19:52:23,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:52:23,705 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 117 transitions. [2020-10-26 19:52:23,705 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-26 19:52:23,705 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 117 transitions. [2020-10-26 19:52:23,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-26 19:52:23,706 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:52:23,706 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:52:23,706 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-26 19:52:23,706 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:52:23,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:52:23,707 INFO L82 PathProgramCache]: Analyzing trace with hash 1533670697, now seen corresponding path program 42 times [2020-10-26 19:52:23,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:52:23,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [668595874] [2020-10-26 19:52:23,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:52:23,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:23,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:23,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:28,768 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:28,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-26 19:52:28,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:52:28,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-26 19:52:28,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:28,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-26 19:52:28,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-26 19:52:28,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-26 19:52:28,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:52:28,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:52:28,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:28,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:52:28,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:52:28,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:52:28,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:52:28,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:52:28,825 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:52:28,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:52:28,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:52:28,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:52:28,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:52:28,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-26 19:52:28,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:52:28,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking...