/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/loops-crafted-1/Mono1_1-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 01:48:29,038 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 01:48:29,042 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 01:48:29,098 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 01:48:29,098 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 01:48:29,105 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 01:48:29,107 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 01:48:29,112 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 01:48:29,115 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 01:48:29,120 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 01:48:29,122 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 01:48:29,123 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 01:48:29,124 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 01:48:29,127 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 01:48:29,129 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 01:48:29,131 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 01:48:29,132 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 01:48:29,135 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 01:48:29,142 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 01:48:29,165 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 01:48:29,167 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 01:48:29,168 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 01:48:29,170 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 01:48:29,172 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 01:48:29,180 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 01:48:29,181 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 01:48:29,181 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 01:48:29,183 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 01:48:29,183 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 01:48:29,184 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 01:48:29,185 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 01:48:29,186 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 01:48:29,187 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 01:48:29,188 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 01:48:29,189 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 01:48:29,190 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 01:48:29,190 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 01:48:29,191 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 01:48:29,191 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 01:48:29,192 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 01:48:29,193 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 01:48:29,201 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 01:48:29,243 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 01:48:29,243 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 01:48:29,247 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 01:48:29,247 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 01:48:29,247 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 01:48:29,248 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 01:48:29,248 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 01:48:29,248 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 01:48:29,248 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 01:48:29,248 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 01:48:29,249 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 01:48:29,250 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 01:48:29,250 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 01:48:29,250 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 01:48:29,250 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 01:48:29,250 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 01:48:29,250 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 01:48:29,251 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 01:48:29,251 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 01:48:29,251 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 01:48:29,251 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 01:48:29,251 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:48:29,252 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 01:48:29,252 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 01:48:29,252 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 01:48:29,252 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 01:48:29,252 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 01:48:29,253 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 01:48:29,253 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 01:48:29,253 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 01:48:29,681 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 01:48:29,708 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 01:48:29,711 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 01:48:29,712 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 01:48:29,713 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 01:48:29,714 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/Mono1_1-2.c [2020-10-27 01:48:29,800 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d6d23ebbf/993175dad6dc49ecb9d4ad4c81d30a9b/FLAGb5c50b1c0 [2020-10-27 01:48:30,358 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 01:48:30,359 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/Mono1_1-2.c [2020-10-27 01:48:30,368 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d6d23ebbf/993175dad6dc49ecb9d4ad4c81d30a9b/FLAGb5c50b1c0 [2020-10-27 01:48:30,729 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d6d23ebbf/993175dad6dc49ecb9d4ad4c81d30a9b [2020-10-27 01:48:30,734 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 01:48:30,742 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 01:48:30,747 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 01:48:30,748 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 01:48:30,752 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 01:48:30,754 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:48:30" (1/1) ... [2020-10-27 01:48:30,759 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41fd514a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:48:30, skipping insertion in model container [2020-10-27 01:48:30,760 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:48:30" (1/1) ... [2020-10-27 01:48:30,769 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 01:48:30,786 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 01:48:31,004 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:48:31,021 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 01:48:31,039 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:48:31,058 INFO L208 MainTranslator]: Completed translation [2020-10-27 01:48:31,059 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:48:31 WrapperNode [2020-10-27 01:48:31,059 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 01:48:31,061 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 01:48:31,061 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 01:48:31,061 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 01:48:31,074 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:48:31" (1/1) ... [2020-10-27 01:48:31,077 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:48:31" (1/1) ... [2020-10-27 01:48:31,087 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:48:31" (1/1) ... [2020-10-27 01:48:31,087 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:48:31" (1/1) ... [2020-10-27 01:48:31,095 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:48:31" (1/1) ... [2020-10-27 01:48:31,104 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:48:31" (1/1) ... [2020-10-27 01:48:31,113 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:48:31" (1/1) ... [2020-10-27 01:48:31,116 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 01:48:31,119 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 01:48:31,119 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 01:48:31,119 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 01:48:31,120 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:48:31" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:48:31,208 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 01:48:31,208 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 01:48:31,208 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 01:48:31,209 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 01:48:31,209 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 01:48:31,209 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 01:48:31,209 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 01:48:31,209 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 01:48:31,210 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 01:48:31,210 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 01:48:31,210 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 01:48:31,210 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 01:48:31,210 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 01:48:31,211 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 01:48:31,211 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 01:48:31,211 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 01:48:31,211 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 01:48:31,445 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 01:48:31,446 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 01:48:31,447 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:48:31 BoogieIcfgContainer [2020-10-27 01:48:31,448 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 01:48:31,450 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 01:48:31,450 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 01:48:31,453 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 01:48:31,454 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 01:48:30" (1/3) ... [2020-10-27 01:48:31,454 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@646437ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:48:31, skipping insertion in model container [2020-10-27 01:48:31,455 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:48:31" (2/3) ... [2020-10-27 01:48:31,455 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@646437ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:48:31, skipping insertion in model container [2020-10-27 01:48:31,455 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:48:31" (3/3) ... [2020-10-27 01:48:31,457 INFO L111 eAbstractionObserver]: Analyzing ICFG Mono1_1-2.c [2020-10-27 01:48:31,469 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 01:48:31,474 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 01:48:31,491 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 01:48:31,532 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 01:48:31,533 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 01:48:31,533 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 01:48:31,533 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 01:48:31,534 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 01:48:31,534 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 01:48:31,538 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 01:48:31,538 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 01:48:31,573 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-10-27 01:48:31,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-27 01:48:31,579 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:48:31,579 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:48:31,580 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:48:31,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:48:31,586 INFO L82 PathProgramCache]: Analyzing trace with hash 1347720711, now seen corresponding path program 1 times [2020-10-27 01:48:31,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:48:31,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [409307207] [2020-10-27 01:48:31,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:48:31,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:31,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:31,870 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:31,870 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-27 01:48:31,870 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:48:31,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 126 [2020-10-27 01:48:31,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:31,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:48:31,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:48:31,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:48:31,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 01:48:31,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:48:31,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:31,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:32,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:32,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:48:32,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:48:32,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 01:48:32,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:32,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:48:32,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:48:32,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:48:32,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:48:32,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:48:32,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [409307207] [2020-10-27 01:48:32,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:48:32,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 01:48:32,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421345889] [2020-10-27 01:48:32,038 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 01:48:32,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:48:32,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 01:48:32,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 01:48:32,065 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 3 states. [2020-10-27 01:48:32,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:48:32,166 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2020-10-27 01:48:32,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 01:48:32,168 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-10-27 01:48:32,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:48:32,175 INFO L225 Difference]: With dead ends: 35 [2020-10-27 01:48:32,175 INFO L226 Difference]: Without dead ends: 14 [2020-10-27 01:48:32,178 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 01:48:32,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-10-27 01:48:32,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-10-27 01:48:32,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-27 01:48:32,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-10-27 01:48:32,219 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 12 [2020-10-27 01:48:32,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:48:32,220 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-10-27 01:48:32,220 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 01:48:32,220 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-10-27 01:48:32,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-27 01:48:32,221 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:48:32,221 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:48:32,221 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 01:48:32,222 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:48:32,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:48:32,223 INFO L82 PathProgramCache]: Analyzing trace with hash 1061429201, now seen corresponding path program 1 times [2020-10-27 01:48:32,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:48:32,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1011950091] [2020-10-27 01:48:32,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:48:32,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:32,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:32,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:32,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-27 01:48:32,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:48:32,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 83 [2020-10-27 01:48:32,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:32,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:48:32,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:48:32,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 01:48:32,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:32,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:48:32,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:32,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:32,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:32,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:48:32,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:48:32,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 01:48:32,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:32,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:48:32,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:48:32,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:48:32,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:32,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:48:32,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1011950091] [2020-10-27 01:48:32,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:48:32,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:48:32,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435028904] [2020-10-27 01:48:32,444 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:48:32,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:48:32,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:48:32,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:48:32,446 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 4 states. [2020-10-27 01:48:32,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:48:32,529 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2020-10-27 01:48:32,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:48:32,529 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-10-27 01:48:32,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:48:32,530 INFO L225 Difference]: With dead ends: 24 [2020-10-27 01:48:32,531 INFO L226 Difference]: Without dead ends: 16 [2020-10-27 01:48:32,532 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:48:32,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-27 01:48:32,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-10-27 01:48:32,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-27 01:48:32,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-10-27 01:48:32,541 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 12 [2020-10-27 01:48:32,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:48:32,542 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-10-27 01:48:32,542 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:48:32,542 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-10-27 01:48:32,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-27 01:48:32,543 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:48:32,543 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:48:32,543 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 01:48:32,544 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:48:32,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:48:32,544 INFO L82 PathProgramCache]: Analyzing trace with hash 1101414388, now seen corresponding path program 1 times [2020-10-27 01:48:32,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:48:32,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [837855244] [2020-10-27 01:48:32,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:48:32,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:32,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:32,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:32,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-27 01:48:32,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:48:32,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 107 [2020-10-27 01:48:32,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:32,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:48:32,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:48:32,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 01:48:32,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:32,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:48:32,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:32,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:32,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:32,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:48:32,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:48:32,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 01:48:32,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:32,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:48:32,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:48:32,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:48:32,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:32,800 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:48:32,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [837855244] [2020-10-27 01:48:32,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:48:32,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:48:32,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142522043] [2020-10-27 01:48:32,802 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:48:32,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:48:32,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:48:32,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:48:32,803 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 4 states. [2020-10-27 01:48:32,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:48:32,884 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2020-10-27 01:48:32,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:48:32,885 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-10-27 01:48:32,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:48:32,886 INFO L225 Difference]: With dead ends: 24 [2020-10-27 01:48:32,886 INFO L226 Difference]: Without dead ends: 18 [2020-10-27 01:48:32,887 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:48:32,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-27 01:48:32,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2020-10-27 01:48:32,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-27 01:48:32,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-10-27 01:48:32,895 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 14 [2020-10-27 01:48:32,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:48:32,896 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-10-27 01:48:32,896 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:48:32,896 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-10-27 01:48:32,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-27 01:48:32,898 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:48:32,899 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:48:32,899 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 01:48:32,899 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:48:32,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:48:32,900 INFO L82 PathProgramCache]: Analyzing trace with hash -1647486503, now seen corresponding path program 1 times [2020-10-27 01:48:32,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:48:32,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1758418293] [2020-10-27 01:48:32,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:48:32,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:32,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:33,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:33,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:33,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-27 01:48:33,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:48:33,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 294 [2020-10-27 01:48:33,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:33,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 01:48:33,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:48:33,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 01:48:33,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:48:33,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:48:33,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:33,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:33,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:33,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:48:33,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:48:33,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:48:33,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:33,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:48:33,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:48:33,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:48:33,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:33,314 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:48:33,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1758418293] [2020-10-27 01:48:33,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:48:33,315 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 01:48:33,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634278892] [2020-10-27 01:48:33,316 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 01:48:33,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:48:33,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 01:48:33,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:48:33,318 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 5 states. [2020-10-27 01:48:33,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:48:33,436 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2020-10-27 01:48:33,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 01:48:33,437 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-10-27 01:48:33,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:48:33,438 INFO L225 Difference]: With dead ends: 28 [2020-10-27 01:48:33,438 INFO L226 Difference]: Without dead ends: 19 [2020-10-27 01:48:33,439 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:48:33,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-27 01:48:33,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-27 01:48:33,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-27 01:48:33,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-10-27 01:48:33,445 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 16 [2020-10-27 01:48:33,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:48:33,446 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-10-27 01:48:33,446 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 01:48:33,446 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-10-27 01:48:33,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-27 01:48:33,447 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:48:33,447 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:48:33,447 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 01:48:33,447 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:48:33,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:48:33,448 INFO L82 PathProgramCache]: Analyzing trace with hash 1678553212, now seen corresponding path program 2 times [2020-10-27 01:48:33,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:48:33,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1050700824] [2020-10-27 01:48:33,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:48:33,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:33,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:33,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:33,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:33,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 01:48:33,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:48:33,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 134 [2020-10-27 01:48:33,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:33,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:48:33,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:48:33,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 01:48:33,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:33,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:48:33,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:33,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:33,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:33,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:48:33,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:48:33,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:48:33,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:33,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:48:33,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:48:33,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:48:33,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:33,684 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:48:33,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1050700824] [2020-10-27 01:48:33,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:48:33,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 01:48:33,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059964745] [2020-10-27 01:48:33,685 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:48:33,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:48:33,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:48:33,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:48:33,687 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 6 states. [2020-10-27 01:48:33,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:48:33,840 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-10-27 01:48:33,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 01:48:33,840 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-10-27 01:48:33,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:48:33,841 INFO L225 Difference]: With dead ends: 30 [2020-10-27 01:48:33,841 INFO L226 Difference]: Without dead ends: 21 [2020-10-27 01:48:33,842 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:48:33,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-27 01:48:33,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-10-27 01:48:33,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-27 01:48:33,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-10-27 01:48:33,849 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 18 [2020-10-27 01:48:33,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:48:33,849 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-10-27 01:48:33,849 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:48:33,850 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-10-27 01:48:33,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-27 01:48:33,861 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:48:33,861 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:48:33,862 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 01:48:33,862 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:48:33,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:48:33,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1747916193, now seen corresponding path program 3 times [2020-10-27 01:48:33,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:48:33,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1048312041] [2020-10-27 01:48:33,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:48:33,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:33,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:33,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:34,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:34,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 01:48:34,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:48:34,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 147 [2020-10-27 01:48:34,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:34,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:48:34,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:48:34,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 01:48:34,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:34,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:48:34,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:34,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:34,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:34,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:48:34,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:48:34,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:48:34,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:34,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:48:34,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:48:34,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:48:34,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:34,124 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:48:34,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1048312041] [2020-10-27 01:48:34,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:48:34,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 01:48:34,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295188734] [2020-10-27 01:48:34,126 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 01:48:34,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:48:34,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 01:48:34,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:48:34,127 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 7 states. [2020-10-27 01:48:34,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:48:34,319 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2020-10-27 01:48:34,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:48:34,320 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-10-27 01:48:34,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:48:34,320 INFO L225 Difference]: With dead ends: 32 [2020-10-27 01:48:34,321 INFO L226 Difference]: Without dead ends: 23 [2020-10-27 01:48:34,321 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:48:34,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-27 01:48:34,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-27 01:48:34,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-27 01:48:34,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-10-27 01:48:34,328 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 20 [2020-10-27 01:48:34,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:48:34,328 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-10-27 01:48:34,328 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 01:48:34,329 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-10-27 01:48:34,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 01:48:34,329 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:48:34,329 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:48:34,330 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 01:48:34,330 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:48:34,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:48:34,330 INFO L82 PathProgramCache]: Analyzing trace with hash -345098366, now seen corresponding path program 4 times [2020-10-27 01:48:34,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:48:34,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [253553388] [2020-10-27 01:48:34,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:48:34,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:34,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:34,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:34,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:34,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-27 01:48:34,487 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:48:34,487 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 145 [2020-10-27 01:48:34,487 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:34,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:48:34,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:48:34,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 01:48:34,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:34,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:48:34,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:34,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:34,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:34,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:48:34,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:48:34,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 01:48:34,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:34,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:48:34,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:48:34,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:48:34,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:34,653 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:48:34,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [253553388] [2020-10-27 01:48:34,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:48:34,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 01:48:34,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357155704] [2020-10-27 01:48:34,659 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:48:34,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:48:34,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:48:34,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:48:34,661 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 8 states. [2020-10-27 01:48:34,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:48:34,938 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2020-10-27 01:48:34,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 01:48:34,938 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-10-27 01:48:34,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:48:34,939 INFO L225 Difference]: With dead ends: 34 [2020-10-27 01:48:34,939 INFO L226 Difference]: Without dead ends: 25 [2020-10-27 01:48:34,940 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:48:34,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-27 01:48:34,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-27 01:48:34,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-27 01:48:34,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2020-10-27 01:48:34,947 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 22 [2020-10-27 01:48:34,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:48:34,947 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2020-10-27 01:48:34,947 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:48:34,947 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2020-10-27 01:48:34,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-27 01:48:34,948 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:48:34,948 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:48:34,949 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 01:48:34,949 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:48:34,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:48:34,949 INFO L82 PathProgramCache]: Analyzing trace with hash -856897563, now seen corresponding path program 5 times [2020-10-27 01:48:34,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:48:34,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1785293002] [2020-10-27 01:48:34,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:48:34,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:34,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:35,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:35,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:35,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 01:48:35,225 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:48:35,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 263 [2020-10-27 01:48:35,225 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:35,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:48:35,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:48:35,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 01:48:35,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:35,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:48:35,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:35,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:35,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:35,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:48:35,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:48:35,356 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:48:35,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:35,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:48:35,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:48:35,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:48:35,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:35,362 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:48:35,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1785293002] [2020-10-27 01:48:35,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:48:35,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:48:35,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592103800] [2020-10-27 01:48:35,363 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:48:35,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:48:35,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:48:35,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:48:35,364 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 9 states. [2020-10-27 01:48:35,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:48:35,690 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2020-10-27 01:48:35,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 01:48:35,690 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2020-10-27 01:48:35,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:48:35,691 INFO L225 Difference]: With dead ends: 36 [2020-10-27 01:48:35,691 INFO L226 Difference]: Without dead ends: 27 [2020-10-27 01:48:35,692 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:48:35,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-27 01:48:35,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-27 01:48:35,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-27 01:48:35,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-10-27 01:48:35,699 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 24 [2020-10-27 01:48:35,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:48:35,699 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-10-27 01:48:35,700 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:48:35,700 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-10-27 01:48:35,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 01:48:35,700 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:48:35,701 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:48:35,701 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 01:48:35,701 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:48:35,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:48:35,702 INFO L82 PathProgramCache]: Analyzing trace with hash 1225313160, now seen corresponding path program 6 times [2020-10-27 01:48:35,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:48:35,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [697977320] [2020-10-27 01:48:35,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:48:35,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:35,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:35,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:35,893 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:35,893 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 01:48:35,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:48:35,894 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 179 [2020-10-27 01:48:35,894 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:35,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:48:35,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:48:35,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 01:48:35,894 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:36,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:48:36,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:36,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:36,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:36,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:48:36,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:48:36,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:48:36,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:36,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:48:36,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:48:36,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:48:36,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:36,074 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:48:36,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [697977320] [2020-10-27 01:48:36,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:48:36,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:48:36,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324967197] [2020-10-27 01:48:36,076 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:48:36,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:48:36,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:48:36,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:48:36,077 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 10 states. [2020-10-27 01:48:36,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:48:36,509 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2020-10-27 01:48:36,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:48:36,509 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-10-27 01:48:36,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:48:36,510 INFO L225 Difference]: With dead ends: 38 [2020-10-27 01:48:36,510 INFO L226 Difference]: Without dead ends: 29 [2020-10-27 01:48:36,511 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:48:36,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-27 01:48:36,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-27 01:48:36,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-27 01:48:36,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2020-10-27 01:48:36,519 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 26 [2020-10-27 01:48:36,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:48:36,520 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2020-10-27 01:48:36,520 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:48:36,520 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2020-10-27 01:48:36,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-27 01:48:36,521 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:48:36,521 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:48:36,521 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 01:48:36,521 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:48:36,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:48:36,522 INFO L82 PathProgramCache]: Analyzing trace with hash 775058027, now seen corresponding path program 7 times [2020-10-27 01:48:36,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:48:36,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [668193928] [2020-10-27 01:48:36,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:48:36,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:36,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:36,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:36,903 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:36,903 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 01:48:36,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:48:36,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 368 [2020-10-27 01:48:36,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:36,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:48:36,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:48:36,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 01:48:36,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:37,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:48:37,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:37,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:37,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:37,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:48:37,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:48:37,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 01:48:37,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:37,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:48:37,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:48:37,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:48:37,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-27 01:48:37,127 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:48:37,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [668193928] [2020-10-27 01:48:37,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:48:37,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:48:37,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822901213] [2020-10-27 01:48:37,128 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:48:37,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:48:37,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:48:37,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:48:37,131 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 11 states. [2020-10-27 01:48:37,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:48:37,669 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2020-10-27 01:48:37,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:48:37,670 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2020-10-27 01:48:37,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:48:37,671 INFO L225 Difference]: With dead ends: 40 [2020-10-27 01:48:37,671 INFO L226 Difference]: Without dead ends: 31 [2020-10-27 01:48:37,672 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:48:37,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-27 01:48:37,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-10-27 01:48:37,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-27 01:48:37,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2020-10-27 01:48:37,680 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 28 [2020-10-27 01:48:37,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:48:37,680 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2020-10-27 01:48:37,680 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:48:37,680 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2020-10-27 01:48:37,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 01:48:37,681 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:48:37,681 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:48:37,682 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 01:48:37,682 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:48:37,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:48:37,682 INFO L82 PathProgramCache]: Analyzing trace with hash 1871572110, now seen corresponding path program 8 times [2020-10-27 01:48:37,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:48:37,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1092656234] [2020-10-27 01:48:37,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:48:37,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:37,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:37,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:38,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:38,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 01:48:38,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:48:38,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 313 [2020-10-27 01:48:38,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:38,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:48:38,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:48:38,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 01:48:38,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:38,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:48:38,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:38,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:38,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:38,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:48:38,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:48:38,202 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:48:38,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:38,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:48:38,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:48:38,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:48:38,203 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:38,210 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:48:38,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1092656234] [2020-10-27 01:48:38,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:48:38,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:48:38,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959432262] [2020-10-27 01:48:38,212 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:48:38,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:48:38,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:48:38,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:48:38,213 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 12 states. [2020-10-27 01:48:38,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:48:38,747 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2020-10-27 01:48:38,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:48:38,747 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 30 [2020-10-27 01:48:38,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:48:38,748 INFO L225 Difference]: With dead ends: 42 [2020-10-27 01:48:38,748 INFO L226 Difference]: Without dead ends: 33 [2020-10-27 01:48:38,749 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:48:38,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-27 01:48:38,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-10-27 01:48:38,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-27 01:48:38,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-10-27 01:48:38,757 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 30 [2020-10-27 01:48:38,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:48:38,757 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-10-27 01:48:38,757 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:48:38,757 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-10-27 01:48:38,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 01:48:38,758 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:48:38,759 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:48:38,759 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 01:48:38,759 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:48:38,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:48:38,759 INFO L82 PathProgramCache]: Analyzing trace with hash -940348943, now seen corresponding path program 9 times [2020-10-27 01:48:38,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:48:38,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2063561521] [2020-10-27 01:48:38,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:48:38,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:38,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:38,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:39,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:39,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 01:48:39,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:48:39,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 271 [2020-10-27 01:48:39,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:39,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:48:39,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:48:39,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 01:48:39,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:39,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:48:39,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:39,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:39,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:39,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:48:39,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:48:39,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:48:39,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:39,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:48:39,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:48:39,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:48:39,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:39,272 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:48:39,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2063561521] [2020-10-27 01:48:39,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:48:39,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:48:39,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418895005] [2020-10-27 01:48:39,274 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:48:39,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:48:39,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:48:39,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:48:39,275 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 13 states. [2020-10-27 01:48:39,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:48:39,886 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2020-10-27 01:48:39,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 01:48:39,887 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 32 [2020-10-27 01:48:39,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:48:39,888 INFO L225 Difference]: With dead ends: 44 [2020-10-27 01:48:39,892 INFO L226 Difference]: Without dead ends: 35 [2020-10-27 01:48:39,893 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:48:39,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-27 01:48:39,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-10-27 01:48:39,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-27 01:48:39,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2020-10-27 01:48:39,904 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 32 [2020-10-27 01:48:39,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:48:39,905 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2020-10-27 01:48:39,905 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:48:39,906 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2020-10-27 01:48:39,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 01:48:39,908 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:48:39,908 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:48:39,909 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 01:48:39,909 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:48:39,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:48:39,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1662051692, now seen corresponding path program 10 times [2020-10-27 01:48:39,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:48:39,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [880923524] [2020-10-27 01:48:39,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:48:39,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:39,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:40,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:40,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:40,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-27 01:48:40,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:48:40,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 442 [2020-10-27 01:48:40,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:40,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:48:40,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:48:40,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 01:48:40,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:48:40,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:48:40,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:40,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:40,620 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:40,620 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:48:40,620 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:48:40,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:48:40,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:40,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:48:40,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:48:40,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:48:40,621 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:40,627 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:48:40,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [880923524] [2020-10-27 01:48:40,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:48:40,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 01:48:40,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224978972] [2020-10-27 01:48:40,629 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 01:48:40,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:48:40,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 01:48:40,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:48:40,631 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 14 states. [2020-10-27 01:48:41,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:48:41,380 INFO L93 Difference]: Finished difference Result 46 states and 49 transitions. [2020-10-27 01:48:41,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 01:48:41,380 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 34 [2020-10-27 01:48:41,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:48:41,381 INFO L225 Difference]: With dead ends: 46 [2020-10-27 01:48:41,381 INFO L226 Difference]: Without dead ends: 37 [2020-10-27 01:48:41,382 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2020-10-27 01:48:41,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-27 01:48:41,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-10-27 01:48:41,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-27 01:48:41,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2020-10-27 01:48:41,394 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 34 [2020-10-27 01:48:41,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:48:41,394 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2020-10-27 01:48:41,394 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 01:48:41,394 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2020-10-27 01:48:41,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-27 01:48:41,396 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:48:41,396 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:48:41,396 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 01:48:41,396 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:48:41,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:48:41,397 INFO L82 PathProgramCache]: Analyzing trace with hash 566308471, now seen corresponding path program 11 times [2020-10-27 01:48:41,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:48:41,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1401057967] [2020-10-27 01:48:41,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:48:41,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:41,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:41,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:41,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:41,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 01:48:41,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:48:41,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 528 [2020-10-27 01:48:41,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:41,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:48:41,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:48:41,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 01:48:41,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:42,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:48:42,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:42,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:42,203 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:42,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:48:42,204 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:48:42,204 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 01:48:42,204 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:42,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:48:42,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:48:42,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:48:42,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:42,211 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:48:42,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1401057967] [2020-10-27 01:48:42,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:48:42,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:48:42,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968593986] [2020-10-27 01:48:42,212 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:48:42,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:48:42,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:48:42,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:48:42,213 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 15 states. [2020-10-27 01:48:43,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:48:43,049 INFO L93 Difference]: Finished difference Result 48 states and 51 transitions. [2020-10-27 01:48:43,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 01:48:43,050 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 36 [2020-10-27 01:48:43,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:48:43,051 INFO L225 Difference]: With dead ends: 48 [2020-10-27 01:48:43,051 INFO L226 Difference]: Without dead ends: 39 [2020-10-27 01:48:43,052 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2020-10-27 01:48:43,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-27 01:48:43,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-10-27 01:48:43,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-27 01:48:43,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-10-27 01:48:43,061 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 36 [2020-10-27 01:48:43,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:48:43,061 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-10-27 01:48:43,061 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:48:43,061 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-10-27 01:48:43,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 01:48:43,062 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:48:43,062 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:48:43,062 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 01:48:43,063 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:48:43,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:48:43,064 INFO L82 PathProgramCache]: Analyzing trace with hash -1168255590, now seen corresponding path program 12 times [2020-10-27 01:48:43,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:48:43,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [51473927] [2020-10-27 01:48:43,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:48:43,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:43,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:43,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:43,457 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:43,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-27 01:48:43,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:48:43,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 379 [2020-10-27 01:48:43,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:43,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:48:43,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:48:43,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 01:48:43,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:43,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:48:43,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:43,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:43,752 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:43,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:48:43,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:48:43,753 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:48:43,753 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:43,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:48:43,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:48:43,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:48:43,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:43,762 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 13 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:48:43,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [51473927] [2020-10-27 01:48:43,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:48:43,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 01:48:43,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172278051] [2020-10-27 01:48:43,763 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 01:48:43,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:48:43,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 01:48:43,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:48:43,764 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 16 states. [2020-10-27 01:48:44,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:48:44,709 INFO L93 Difference]: Finished difference Result 50 states and 53 transitions. [2020-10-27 01:48:44,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 01:48:44,709 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 38 [2020-10-27 01:48:44,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:48:44,710 INFO L225 Difference]: With dead ends: 50 [2020-10-27 01:48:44,710 INFO L226 Difference]: Without dead ends: 41 [2020-10-27 01:48:44,712 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2020-10-27 01:48:44,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-27 01:48:44,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-10-27 01:48:44,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-27 01:48:44,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2020-10-27 01:48:44,720 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 38 [2020-10-27 01:48:44,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:48:44,720 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2020-10-27 01:48:44,720 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 01:48:44,721 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2020-10-27 01:48:44,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-27 01:48:44,721 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:48:44,721 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:48:44,722 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 01:48:44,722 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:48:44,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:48:44,722 INFO L82 PathProgramCache]: Analyzing trace with hash -1637007363, now seen corresponding path program 13 times [2020-10-27 01:48:44,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:48:44,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2075202994] [2020-10-27 01:48:44,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:48:44,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:44,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:44,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:45,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:45,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-27 01:48:45,290 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:48:45,290 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 540 [2020-10-27 01:48:45,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:45,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 01:48:45,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:48:45,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 01:48:45,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:45,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:48:45,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:45,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:45,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:45,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:48:45,602 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:48:45,602 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:48:45,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:45,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:48:45,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:48:45,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:48:45,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:45,610 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 14 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:48:45,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2075202994] [2020-10-27 01:48:45,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:48:45,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 01:48:45,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173081359] [2020-10-27 01:48:45,614 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 01:48:45,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:48:45,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 01:48:45,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:48:45,615 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 17 states. [2020-10-27 01:48:46,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:48:46,612 INFO L93 Difference]: Finished difference Result 52 states and 55 transitions. [2020-10-27 01:48:46,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 01:48:46,613 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 40 [2020-10-27 01:48:46,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:48:46,613 INFO L225 Difference]: With dead ends: 52 [2020-10-27 01:48:46,614 INFO L226 Difference]: Without dead ends: 43 [2020-10-27 01:48:46,615 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2020-10-27 01:48:46,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-27 01:48:46,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-10-27 01:48:46,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-27 01:48:46,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2020-10-27 01:48:46,623 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 40 [2020-10-27 01:48:46,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:48:46,623 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2020-10-27 01:48:46,623 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 01:48:46,623 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2020-10-27 01:48:46,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-27 01:48:46,624 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:48:46,624 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:48:46,624 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 01:48:46,624 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:48:46,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:48:46,625 INFO L82 PathProgramCache]: Analyzing trace with hash -1135895136, now seen corresponding path program 14 times [2020-10-27 01:48:46,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:48:46,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1572080749] [2020-10-27 01:48:46,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:48:46,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:46,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:46,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:47,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:47,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-27 01:48:47,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:48:47,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 412 [2020-10-27 01:48:47,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:47,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 01:48:47,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:48:47,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 01:48:47,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:47,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:48:47,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:47,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:47,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:47,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:48:47,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:48:47,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 01:48:47,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:47,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:48:47,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:48:47,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:48:47,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:47,423 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 15 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:48:47,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1572080749] [2020-10-27 01:48:47,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:48:47,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 01:48:47,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826736111] [2020-10-27 01:48:47,424 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 01:48:47,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:48:47,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 01:48:47,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:48:47,428 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 18 states. [2020-10-27 01:48:48,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:48:48,509 INFO L93 Difference]: Finished difference Result 54 states and 57 transitions. [2020-10-27 01:48:48,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 01:48:48,510 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 42 [2020-10-27 01:48:48,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:48:48,510 INFO L225 Difference]: With dead ends: 54 [2020-10-27 01:48:48,511 INFO L226 Difference]: Without dead ends: 45 [2020-10-27 01:48:48,512 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=135, Invalid=921, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 01:48:48,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-27 01:48:48,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-10-27 01:48:48,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-27 01:48:48,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-10-27 01:48:48,522 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 42 [2020-10-27 01:48:48,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:48:48,522 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-10-27 01:48:48,522 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 01:48:48,522 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-10-27 01:48:48,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-27 01:48:48,523 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:48:48,523 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:48:48,523 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 01:48:48,524 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:48:48,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:48:48,524 INFO L82 PathProgramCache]: Analyzing trace with hash -603382141, now seen corresponding path program 15 times [2020-10-27 01:48:48,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:48:48,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [207928497] [2020-10-27 01:48:48,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:48:48,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:48,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:48,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:49,189 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:49,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-27 01:48:49,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:48:49,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 651 [2020-10-27 01:48:49,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:49,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 01:48:49,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:48:49,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 01:48:49,190 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:49,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:48:49,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:49,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:49,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:49,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:48:49,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:48:49,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:48:49,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:49,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:48:49,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:48:49,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:48:49,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:49,579 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 16 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:48:49,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [207928497] [2020-10-27 01:48:49,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:48:49,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 01:48:49,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051684754] [2020-10-27 01:48:49,581 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 01:48:49,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:48:49,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 01:48:49,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:48:49,582 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 19 states. [2020-10-27 01:48:50,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:48:50,720 INFO L93 Difference]: Finished difference Result 56 states and 59 transitions. [2020-10-27 01:48:50,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 01:48:50,721 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 44 [2020-10-27 01:48:50,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:48:50,722 INFO L225 Difference]: With dead ends: 56 [2020-10-27 01:48:50,722 INFO L226 Difference]: Without dead ends: 47 [2020-10-27 01:48:50,723 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=144, Invalid=1046, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 01:48:50,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-27 01:48:50,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-10-27 01:48:50,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-27 01:48:50,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2020-10-27 01:48:50,732 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 44 [2020-10-27 01:48:50,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:48:50,733 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2020-10-27 01:48:50,733 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 01:48:50,733 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2020-10-27 01:48:50,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-27 01:48:50,734 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:48:50,734 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:48:50,734 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 01:48:50,734 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:48:50,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:48:50,735 INFO L82 PathProgramCache]: Analyzing trace with hash 40497830, now seen corresponding path program 16 times [2020-10-27 01:48:50,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:48:50,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [530479144] [2020-10-27 01:48:50,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:48:50,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:50,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:50,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:51,395 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:51,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-27 01:48:51,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:48:51,396 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 644 [2020-10-27 01:48:51,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:51,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 01:48:51,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:48:51,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-27 01:48:51,397 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:51,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:48:51,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:51,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:51,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:51,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:48:51,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:48:51,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:48:51,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:51,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:48:51,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:48:51,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:48:51,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-27 01:48:51,804 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 17 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:48:51,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [530479144] [2020-10-27 01:48:51,804 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:48:51,804 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 01:48:51,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856617642] [2020-10-27 01:48:51,806 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 01:48:51,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:48:51,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 01:48:51,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:48:51,807 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 20 states. [2020-10-27 01:48:53,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:48:53,125 INFO L93 Difference]: Finished difference Result 58 states and 61 transitions. [2020-10-27 01:48:53,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 01:48:53,126 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 46 [2020-10-27 01:48:53,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:48:53,128 INFO L225 Difference]: With dead ends: 58 [2020-10-27 01:48:53,128 INFO L226 Difference]: Without dead ends: 49 [2020-10-27 01:48:53,129 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=153, Invalid=1179, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 01:48:53,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-27 01:48:53,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-10-27 01:48:53,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-27 01:48:53,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2020-10-27 01:48:53,144 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 46 [2020-10-27 01:48:53,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:48:53,145 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2020-10-27 01:48:53,145 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 01:48:53,145 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2020-10-27 01:48:53,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-27 01:48:53,146 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:48:53,146 INFO L422 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:48:53,146 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 01:48:53,146 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:48:53,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:48:53,147 INFO L82 PathProgramCache]: Analyzing trace with hash 333859337, now seen corresponding path program 17 times [2020-10-27 01:48:53,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:48:53,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [95948777] [2020-10-27 01:48:53,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:48:53,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:53,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:53,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:53,790 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:53,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-27 01:48:53,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:48:53,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 623 [2020-10-27 01:48:53,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:53,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 01:48:53,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:48:53,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-27 01:48:53,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:54,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:48:54,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:54,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:54,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:54,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:48:54,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:48:54,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:48:54,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:54,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:48:54,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:48:54,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:48:54,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:54,278 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 18 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:48:54,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [95948777] [2020-10-27 01:48:54,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:48:54,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 01:48:54,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824079970] [2020-10-27 01:48:54,280 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 01:48:54,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:48:54,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 01:48:54,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:48:54,281 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 21 states. [2020-10-27 01:48:55,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:48:55,696 INFO L93 Difference]: Finished difference Result 60 states and 63 transitions. [2020-10-27 01:48:55,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 01:48:55,697 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 48 [2020-10-27 01:48:55,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:48:55,698 INFO L225 Difference]: With dead ends: 60 [2020-10-27 01:48:55,698 INFO L226 Difference]: Without dead ends: 51 [2020-10-27 01:48:55,700 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=162, Invalid=1320, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 01:48:55,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-27 01:48:55,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-10-27 01:48:55,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-27 01:48:55,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-10-27 01:48:55,707 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 48 [2020-10-27 01:48:55,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:48:55,707 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-10-27 01:48:55,707 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 01:48:55,708 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-10-27 01:48:55,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-27 01:48:55,708 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:48:55,708 INFO L422 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:48:55,708 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 01:48:55,709 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:48:55,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:48:55,709 INFO L82 PathProgramCache]: Analyzing trace with hash -1213573972, now seen corresponding path program 18 times [2020-10-27 01:48:55,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:48:55,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1449333208] [2020-10-27 01:48:55,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:48:55,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:55,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:55,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:56,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:56,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-27 01:48:56,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:48:56,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 848 [2020-10-27 01:48:56,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:56,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 01:48:56,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:48:56,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 01:48:56,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:56,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:48:56,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:56,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:57,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:57,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:48:57,001 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:48:57,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:48:57,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:57,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:48:57,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:48:57,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:48:57,001 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:57,010 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 19 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:48:57,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1449333208] [2020-10-27 01:48:57,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:48:57,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 01:48:57,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505037716] [2020-10-27 01:48:57,013 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 01:48:57,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:48:57,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 01:48:57,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2020-10-27 01:48:57,014 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 22 states. [2020-10-27 01:48:58,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:48:58,521 INFO L93 Difference]: Finished difference Result 62 states and 65 transitions. [2020-10-27 01:48:58,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 01:48:58,522 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 50 [2020-10-27 01:48:58,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:48:58,523 INFO L225 Difference]: With dead ends: 62 [2020-10-27 01:48:58,523 INFO L226 Difference]: Without dead ends: 53 [2020-10-27 01:48:58,524 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=171, Invalid=1469, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 01:48:58,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-27 01:48:58,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-10-27 01:48:58,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-27 01:48:58,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2020-10-27 01:48:58,537 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 50 [2020-10-27 01:48:58,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:48:58,537 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2020-10-27 01:48:58,537 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 01:48:58,538 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2020-10-27 01:48:58,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 01:48:58,540 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:48:58,541 INFO L422 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:48:58,541 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 01:48:58,541 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:48:58,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:48:58,543 INFO L82 PathProgramCache]: Analyzing trace with hash 2056667791, now seen corresponding path program 19 times [2020-10-27 01:48:58,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:48:58,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [192251911] [2020-10-27 01:48:58,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:48:58,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:58,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:58,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:59,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:59,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 01:48:59,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:48:59,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 909 [2020-10-27 01:48:59,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:59,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 01:48:59,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:48:59,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 01:48:59,476 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:59,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:48:59,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:48:59,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:48:59,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:48:59,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:48:59,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:48:59,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:48:59,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:48:59,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:48:59,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:48:59,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:48:59,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:48:59,986 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 20 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:48:59,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [192251911] [2020-10-27 01:48:59,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:48:59,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 01:48:59,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878142265] [2020-10-27 01:48:59,988 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 01:48:59,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:48:59,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 01:48:59,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:48:59,990 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 23 states. [2020-10-27 01:49:01,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:49:01,660 INFO L93 Difference]: Finished difference Result 64 states and 67 transitions. [2020-10-27 01:49:01,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 01:49:01,660 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 52 [2020-10-27 01:49:01,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:49:01,661 INFO L225 Difference]: With dead ends: 64 [2020-10-27 01:49:01,661 INFO L226 Difference]: Without dead ends: 55 [2020-10-27 01:49:01,662 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=180, Invalid=1626, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 01:49:01,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-27 01:49:01,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-10-27 01:49:01,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-27 01:49:01,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2020-10-27 01:49:01,669 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 52 [2020-10-27 01:49:01,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:49:01,669 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2020-10-27 01:49:01,669 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 01:49:01,670 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2020-10-27 01:49:01,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-27 01:49:01,670 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:49:01,670 INFO L422 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:49:01,671 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 01:49:01,671 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:49:01,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:49:01,671 INFO L82 PathProgramCache]: Analyzing trace with hash 842941362, now seen corresponding path program 20 times [2020-10-27 01:49:01,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:49:01,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1248920986] [2020-10-27 01:49:01,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:49:01,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:01,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:01,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:02,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:02,338 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 01:49:02,338 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:49:02,338 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 652 [2020-10-27 01:49:02,338 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:02,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 01:49:02,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:49:02,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-27 01:49:02,338 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:02,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:49:02,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:02,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:02,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:02,849 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:49:02,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:49:02,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:49:02,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:02,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:49:02,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:49:02,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:49:02,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:02,859 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 21 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:49:02,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1248920986] [2020-10-27 01:49:02,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:49:02,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 01:49:02,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808644623] [2020-10-27 01:49:02,860 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 01:49:02,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:49:02,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 01:49:02,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2020-10-27 01:49:02,861 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 24 states. [2020-10-27 01:49:04,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:49:04,724 INFO L93 Difference]: Finished difference Result 66 states and 69 transitions. [2020-10-27 01:49:04,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 01:49:04,724 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 54 [2020-10-27 01:49:04,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:49:04,725 INFO L225 Difference]: With dead ends: 66 [2020-10-27 01:49:04,725 INFO L226 Difference]: Without dead ends: 57 [2020-10-27 01:49:04,727 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=189, Invalid=1791, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 01:49:04,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-27 01:49:04,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-10-27 01:49:04,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-27 01:49:04,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-10-27 01:49:04,734 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 54 [2020-10-27 01:49:04,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:49:04,734 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-10-27 01:49:04,734 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 01:49:04,735 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-10-27 01:49:04,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 01:49:04,738 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:49:04,738 INFO L422 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:49:04,738 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 01:49:04,739 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:49:04,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:49:04,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1612019691, now seen corresponding path program 21 times [2020-10-27 01:49:04,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:49:04,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2012782874] [2020-10-27 01:49:04,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:49:04,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:04,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:05,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:05,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:05,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-27 01:49:05,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:49:05,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 930 [2020-10-27 01:49:05,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:05,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 01:49:05,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:49:05,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-27 01:49:05,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:06,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:49:06,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:06,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:06,249 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:06,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:49:06,249 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:49:06,249 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:49:06,249 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:06,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:49:06,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:49:06,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:49:06,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:06,258 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 22 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:49:06,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2012782874] [2020-10-27 01:49:06,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:49:06,259 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 01:49:06,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58517071] [2020-10-27 01:49:06,260 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 01:49:06,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:49:06,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 01:49:06,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2020-10-27 01:49:06,261 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 25 states. [2020-10-27 01:49:08,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:49:08,239 INFO L93 Difference]: Finished difference Result 68 states and 71 transitions. [2020-10-27 01:49:08,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 01:49:08,240 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 56 [2020-10-27 01:49:08,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:49:08,241 INFO L225 Difference]: With dead ends: 68 [2020-10-27 01:49:08,241 INFO L226 Difference]: Without dead ends: 59 [2020-10-27 01:49:08,242 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=198, Invalid=1964, Unknown=0, NotChecked=0, Total=2162 [2020-10-27 01:49:08,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-27 01:49:08,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-10-27 01:49:08,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-27 01:49:08,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2020-10-27 01:49:08,249 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 56 [2020-10-27 01:49:08,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:49:08,249 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2020-10-27 01:49:08,249 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 01:49:08,250 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2020-10-27 01:49:08,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-27 01:49:08,250 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:49:08,250 INFO L422 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:49:08,250 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 01:49:08,251 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:49:08,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:49:08,251 INFO L82 PathProgramCache]: Analyzing trace with hash 1402421176, now seen corresponding path program 22 times [2020-10-27 01:49:08,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:49:08,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [689388592] [2020-10-27 01:49:08,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:49:08,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:08,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:08,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:09,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:09,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-27 01:49:09,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:49:09,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1021 [2020-10-27 01:49:09,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:09,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 01:49:09,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:49:09,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-27 01:49:09,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:09,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:49:09,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:09,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:09,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:09,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:49:09,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:49:09,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:49:09,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:09,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:49:09,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:49:09,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:49:09,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:09,962 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 23 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:49:09,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [689388592] [2020-10-27 01:49:09,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:49:09,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-27 01:49:09,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988993403] [2020-10-27 01:49:09,966 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-27 01:49:09,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:49:09,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-27 01:49:09,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2020-10-27 01:49:09,967 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 26 states. [2020-10-27 01:49:12,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:49:12,004 INFO L93 Difference]: Finished difference Result 70 states and 73 transitions. [2020-10-27 01:49:12,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 01:49:12,005 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 58 [2020-10-27 01:49:12,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:49:12,006 INFO L225 Difference]: With dead ends: 70 [2020-10-27 01:49:12,006 INFO L226 Difference]: Without dead ends: 61 [2020-10-27 01:49:12,007 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=207, Invalid=2145, Unknown=0, NotChecked=0, Total=2352 [2020-10-27 01:49:12,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-27 01:49:12,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-10-27 01:49:12,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-27 01:49:12,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2020-10-27 01:49:12,013 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 58 [2020-10-27 01:49:12,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:49:12,014 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2020-10-27 01:49:12,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-27 01:49:12,014 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2020-10-27 01:49:12,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-27 01:49:12,014 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:49:12,015 INFO L422 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:49:12,015 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 01:49:12,015 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:49:12,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:49:12,015 INFO L82 PathProgramCache]: Analyzing trace with hash -822830437, now seen corresponding path program 23 times [2020-10-27 01:49:12,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:49:12,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [822180073] [2020-10-27 01:49:12,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:49:12,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:12,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:12,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:13,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:13,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-27 01:49:13,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:49:13,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 970 [2020-10-27 01:49:13,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:13,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-27 01:49:13,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:49:13,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-27 01:49:13,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:13,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:49:13,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:13,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:13,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:13,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:49:13,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:49:13,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:49:13,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:13,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:49:13,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:49:13,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:49:13,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:13,651 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 24 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:49:13,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [822180073] [2020-10-27 01:49:13,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:49:13,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-27 01:49:13,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406216959] [2020-10-27 01:49:13,652 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-27 01:49:13,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:49:13,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-27 01:49:13,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2020-10-27 01:49:13,654 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand 27 states. [2020-10-27 01:49:15,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:49:15,949 INFO L93 Difference]: Finished difference Result 72 states and 75 transitions. [2020-10-27 01:49:15,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 01:49:15,950 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 60 [2020-10-27 01:49:15,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:49:15,951 INFO L225 Difference]: With dead ends: 72 [2020-10-27 01:49:15,951 INFO L226 Difference]: Without dead ends: 63 [2020-10-27 01:49:15,953 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=216, Invalid=2334, Unknown=0, NotChecked=0, Total=2550 [2020-10-27 01:49:15,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-27 01:49:15,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-10-27 01:49:15,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-27 01:49:15,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2020-10-27 01:49:15,959 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 60 [2020-10-27 01:49:15,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:49:15,959 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2020-10-27 01:49:15,959 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-27 01:49:15,959 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2020-10-27 01:49:15,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-27 01:49:15,960 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:49:15,960 INFO L422 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:49:15,960 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 01:49:15,960 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:49:15,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:49:15,961 INFO L82 PathProgramCache]: Analyzing trace with hash -395917122, now seen corresponding path program 24 times [2020-10-27 01:49:15,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:49:15,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1851870877] [2020-10-27 01:49:15,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:49:15,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:15,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:16,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:17,094 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:17,095 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 01:49:17,095 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:49:17,095 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1112 [2020-10-27 01:49:17,095 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:17,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 01:49:17,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:49:17,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-27 01:49:17,096 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:17,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:49:17,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:17,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:17,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:17,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:49:17,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:49:17,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:49:17,853 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:17,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:49:17,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:49:17,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:49:17,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:17,863 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 25 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:49:17,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1851870877] [2020-10-27 01:49:17,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:49:17,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-27 01:49:17,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512365797] [2020-10-27 01:49:17,864 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-27 01:49:17,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:49:17,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-27 01:49:17,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2020-10-27 01:49:17,865 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 28 states. [2020-10-27 01:49:20,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:49:20,308 INFO L93 Difference]: Finished difference Result 74 states and 77 transitions. [2020-10-27 01:49:20,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 01:49:20,309 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 62 [2020-10-27 01:49:20,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:49:20,310 INFO L225 Difference]: With dead ends: 74 [2020-10-27 01:49:20,310 INFO L226 Difference]: Without dead ends: 65 [2020-10-27 01:49:20,312 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=225, Invalid=2531, Unknown=0, NotChecked=0, Total=2756 [2020-10-27 01:49:20,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-27 01:49:20,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2020-10-27 01:49:20,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-27 01:49:20,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2020-10-27 01:49:20,320 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 62 [2020-10-27 01:49:20,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:49:20,320 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2020-10-27 01:49:20,320 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-27 01:49:20,320 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2020-10-27 01:49:20,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-27 01:49:20,321 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:49:20,321 INFO L422 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:49:20,321 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 01:49:20,321 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:49:20,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:49:20,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1845885473, now seen corresponding path program 25 times [2020-10-27 01:49:20,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:49:20,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [581615694] [2020-10-27 01:49:20,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:49:20,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:20,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:20,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:21,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:21,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 01:49:21,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:49:21,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1225 [2020-10-27 01:49:21,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:21,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-27 01:49:21,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:49:21,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-27 01:49:21,564 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:22,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:49:22,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:22,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:22,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:22,314 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:49:22,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:49:22,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:49:22,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:22,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:49:22,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:49:22,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:49:22,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:22,327 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 26 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:49:22,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [581615694] [2020-10-27 01:49:22,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:49:22,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-27 01:49:22,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359936174] [2020-10-27 01:49:22,328 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-27 01:49:22,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:49:22,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-27 01:49:22,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2020-10-27 01:49:22,329 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 29 states. [2020-10-27 01:49:24,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:49:24,943 INFO L93 Difference]: Finished difference Result 76 states and 79 transitions. [2020-10-27 01:49:24,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 01:49:24,944 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 64 [2020-10-27 01:49:24,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:49:24,946 INFO L225 Difference]: With dead ends: 76 [2020-10-27 01:49:24,947 INFO L226 Difference]: Without dead ends: 67 [2020-10-27 01:49:24,948 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=234, Invalid=2736, Unknown=0, NotChecked=0, Total=2970 [2020-10-27 01:49:24,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-27 01:49:24,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-10-27 01:49:24,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-27 01:49:24,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2020-10-27 01:49:24,955 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 64 [2020-10-27 01:49:24,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:49:24,955 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2020-10-27 01:49:24,955 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-27 01:49:24,955 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2020-10-27 01:49:24,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-27 01:49:24,956 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:49:24,956 INFO L422 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:49:24,956 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 01:49:24,956 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:49:24,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:49:24,957 INFO L82 PathProgramCache]: Analyzing trace with hash 144596676, now seen corresponding path program 26 times [2020-10-27 01:49:24,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:49:24,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1286846025] [2020-10-27 01:49:24,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:49:24,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:24,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:25,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:26,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:26,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 01:49:26,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:49:26,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1033 [2020-10-27 01:49:26,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:26,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-27 01:49:26,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:49:26,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-27 01:49:26,006 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:26,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:49:26,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:26,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:26,877 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:26,877 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:49:26,878 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:49:26,878 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:49:26,878 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:26,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:49:26,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:49:26,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:49:26,878 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:26,887 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 27 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:49:26,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1286846025] [2020-10-27 01:49:26,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:49:26,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-27 01:49:26,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382126147] [2020-10-27 01:49:26,888 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-27 01:49:26,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:49:26,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-27 01:49:26,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=787, Unknown=0, NotChecked=0, Total=870 [2020-10-27 01:49:26,889 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand 30 states. [2020-10-27 01:49:29,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:49:29,672 INFO L93 Difference]: Finished difference Result 78 states and 81 transitions. [2020-10-27 01:49:29,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-27 01:49:29,673 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 66 [2020-10-27 01:49:29,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:49:29,674 INFO L225 Difference]: With dead ends: 78 [2020-10-27 01:49:29,674 INFO L226 Difference]: Without dead ends: 69 [2020-10-27 01:49:29,676 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=243, Invalid=2949, Unknown=0, NotChecked=0, Total=3192 [2020-10-27 01:49:29,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-27 01:49:29,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-10-27 01:49:29,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-27 01:49:29,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2020-10-27 01:49:29,682 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 66 [2020-10-27 01:49:29,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:49:29,683 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2020-10-27 01:49:29,683 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-27 01:49:29,683 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2020-10-27 01:49:29,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-27 01:49:29,683 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:49:29,683 INFO L422 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:49:29,683 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 01:49:29,683 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:49:29,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:49:29,684 INFO L82 PathProgramCache]: Analyzing trace with hash 1588602535, now seen corresponding path program 27 times [2020-10-27 01:49:29,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:49:29,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [565564296] [2020-10-27 01:49:29,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:49:29,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:29,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:29,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:30,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:30,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-27 01:49:30,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:49:30,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1071 [2020-10-27 01:49:30,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:30,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-27 01:49:30,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:49:30,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-27 01:49:30,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:31,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:49:31,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:31,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:31,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:31,609 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:49:31,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:49:31,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:49:31,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:31,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:49:31,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:49:31,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:49:31,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:31,622 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 28 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:49:31,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [565564296] [2020-10-27 01:49:31,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:49:31,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-27 01:49:31,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661133360] [2020-10-27 01:49:31,623 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-27 01:49:31,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:49:31,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-27 01:49:31,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=844, Unknown=0, NotChecked=0, Total=930 [2020-10-27 01:49:31,624 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 31 states. [2020-10-27 01:49:34,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:49:34,567 INFO L93 Difference]: Finished difference Result 80 states and 83 transitions. [2020-10-27 01:49:34,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 01:49:34,568 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 68 [2020-10-27 01:49:34,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:49:34,569 INFO L225 Difference]: With dead ends: 80 [2020-10-27 01:49:34,569 INFO L226 Difference]: Without dead ends: 71 [2020-10-27 01:49:34,571 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=252, Invalid=3170, Unknown=0, NotChecked=0, Total=3422 [2020-10-27 01:49:34,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-27 01:49:34,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2020-10-27 01:49:34,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-27 01:49:34,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2020-10-27 01:49:34,578 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 68 [2020-10-27 01:49:34,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:49:34,579 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2020-10-27 01:49:34,579 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-27 01:49:34,579 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2020-10-27 01:49:34,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-27 01:49:34,579 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:49:34,580 INFO L422 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:49:34,580 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 01:49:34,580 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:49:34,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:49:34,580 INFO L82 PathProgramCache]: Analyzing trace with hash 2003796426, now seen corresponding path program 28 times [2020-10-27 01:49:34,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:49:34,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [129303210] [2020-10-27 01:49:34,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:49:34,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:34,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:34,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:35,562 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:35,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 01:49:35,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:49:35,563 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 964 [2020-10-27 01:49:35,563 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:35,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-27 01:49:35,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:49:35,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-27 01:49:35,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:36,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:49:36,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:36,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:36,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:36,556 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:49:36,556 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:49:36,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:49:36,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:36,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:49:36,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:49:36,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:49:36,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:36,567 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 29 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:49:36,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [129303210] [2020-10-27 01:49:36,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:49:36,567 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-27 01:49:36,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285765877] [2020-10-27 01:49:36,567 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-27 01:49:36,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:49:36,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-27 01:49:36,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=903, Unknown=0, NotChecked=0, Total=992 [2020-10-27 01:49:36,568 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand 32 states. [2020-10-27 01:49:39,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:49:39,662 INFO L93 Difference]: Finished difference Result 82 states and 85 transitions. [2020-10-27 01:49:39,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 01:49:39,663 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 70 [2020-10-27 01:49:39,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:49:39,664 INFO L225 Difference]: With dead ends: 82 [2020-10-27 01:49:39,665 INFO L226 Difference]: Without dead ends: 73 [2020-10-27 01:49:39,666 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=261, Invalid=3399, Unknown=0, NotChecked=0, Total=3660 [2020-10-27 01:49:39,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-27 01:49:39,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2020-10-27 01:49:39,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-27 01:49:39,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2020-10-27 01:49:39,674 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 70 [2020-10-27 01:49:39,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:49:39,674 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2020-10-27 01:49:39,674 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-27 01:49:39,674 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2020-10-27 01:49:39,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-27 01:49:39,675 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:49:39,675 INFO L422 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:49:39,675 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-27 01:49:39,675 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:49:39,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:49:39,676 INFO L82 PathProgramCache]: Analyzing trace with hash 1573167149, now seen corresponding path program 29 times [2020-10-27 01:49:39,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:49:39,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [18012321] [2020-10-27 01:49:39,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:49:39,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:39,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:39,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:40,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:40,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-27 01:49:40,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:49:40,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1076 [2020-10-27 01:49:40,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:40,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-27 01:49:40,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:49:40,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-27 01:49:40,776 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:41,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:49:41,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:41,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:41,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:41,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:49:41,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:49:41,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:49:41,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:41,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:49:41,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:49:41,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:49:41,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:41,808 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 30 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:49:41,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [18012321] [2020-10-27 01:49:41,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:49:41,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-27 01:49:41,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387702631] [2020-10-27 01:49:41,809 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-27 01:49:41,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:49:41,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-27 01:49:41,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=964, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 01:49:41,810 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand 33 states. [2020-10-27 01:49:45,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:49:45,197 INFO L93 Difference]: Finished difference Result 84 states and 87 transitions. [2020-10-27 01:49:45,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-27 01:49:45,198 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 72 [2020-10-27 01:49:45,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:49:45,199 INFO L225 Difference]: With dead ends: 84 [2020-10-27 01:49:45,199 INFO L226 Difference]: Without dead ends: 75 [2020-10-27 01:49:45,202 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=270, Invalid=3636, Unknown=0, NotChecked=0, Total=3906 [2020-10-27 01:49:45,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-27 01:49:45,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-10-27 01:49:45,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-27 01:49:45,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2020-10-27 01:49:45,209 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 72 [2020-10-27 01:49:45,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:49:45,209 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2020-10-27 01:49:45,209 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-27 01:49:45,210 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2020-10-27 01:49:45,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-27 01:49:45,210 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:49:45,210 INFO L422 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:49:45,210 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-27 01:49:45,211 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:49:45,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:49:45,211 INFO L82 PathProgramCache]: Analyzing trace with hash 55292368, now seen corresponding path program 30 times [2020-10-27 01:49:45,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:49:45,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1347373315] [2020-10-27 01:49:45,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:49:45,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:45,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:45,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:46,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:46,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-27 01:49:46,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:49:46,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 840 [2020-10-27 01:49:46,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:46,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-27 01:49:46,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:49:46,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-27 01:49:46,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:47,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:49:47,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:47,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:47,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:47,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:49:47,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:49:47,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:49:47,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:47,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:49:47,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:49:47,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:49:47,088 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:47,100 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 31 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:49:47,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1347373315] [2020-10-27 01:49:47,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:49:47,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-27 01:49:47,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563419034] [2020-10-27 01:49:47,101 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-27 01:49:47,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:49:47,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-27 01:49:47,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1027, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 01:49:47,103 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 34 states. [2020-10-27 01:49:50,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:49:50,624 INFO L93 Difference]: Finished difference Result 86 states and 89 transitions. [2020-10-27 01:49:50,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-27 01:49:50,626 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 74 [2020-10-27 01:49:50,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:49:50,626 INFO L225 Difference]: With dead ends: 86 [2020-10-27 01:49:50,626 INFO L226 Difference]: Without dead ends: 77 [2020-10-27 01:49:50,628 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=279, Invalid=3881, Unknown=0, NotChecked=0, Total=4160 [2020-10-27 01:49:50,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-27 01:49:50,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2020-10-27 01:49:50,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-27 01:49:50,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2020-10-27 01:49:50,634 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 74 [2020-10-27 01:49:50,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:49:50,635 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2020-10-27 01:49:50,635 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-27 01:49:50,635 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2020-10-27 01:49:50,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-27 01:49:50,636 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:49:50,636 INFO L422 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:49:50,636 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-27 01:49:50,636 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:49:50,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:49:50,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1666508467, now seen corresponding path program 31 times [2020-10-27 01:49:50,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:49:50,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [821767044] [2020-10-27 01:49:50,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:49:50,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:50,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:50,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:52,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:52,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-27 01:49:52,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:49:52,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1467 [2020-10-27 01:49:52,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:52,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-27 01:49:52,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:49:52,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-27 01:49:52,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:53,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:49:53,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:53,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:53,252 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:53,252 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:49:53,252 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:49:53,252 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:49:53,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:53,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:49:53,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:49:53,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:49:53,253 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:53,264 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 32 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:49:53,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [821767044] [2020-10-27 01:49:53,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:49:53,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-27 01:49:53,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870721544] [2020-10-27 01:49:53,268 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-27 01:49:53,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:49:53,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-27 01:49:53,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1092, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 01:49:53,269 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand 35 states. [2020-10-27 01:49:57,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:49:57,015 INFO L93 Difference]: Finished difference Result 88 states and 91 transitions. [2020-10-27 01:49:57,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-27 01:49:57,020 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 76 [2020-10-27 01:49:57,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:49:57,020 INFO L225 Difference]: With dead ends: 88 [2020-10-27 01:49:57,020 INFO L226 Difference]: Without dead ends: 79 [2020-10-27 01:49:57,021 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=288, Invalid=4134, Unknown=0, NotChecked=0, Total=4422 [2020-10-27 01:49:57,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-27 01:49:57,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2020-10-27 01:49:57,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-27 01:49:57,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2020-10-27 01:49:57,028 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 76 [2020-10-27 01:49:57,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:49:57,028 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2020-10-27 01:49:57,028 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-27 01:49:57,028 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2020-10-27 01:49:57,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-27 01:49:57,029 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:49:57,029 INFO L422 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:49:57,029 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-27 01:49:57,029 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:49:57,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:49:57,030 INFO L82 PathProgramCache]: Analyzing trace with hash -438014250, now seen corresponding path program 32 times [2020-10-27 01:49:57,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:49:57,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1764359502] [2020-10-27 01:49:57,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:49:57,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:57,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:57,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:58,102 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:58,102 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 01:49:58,102 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:49:58,102 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1047 [2020-10-27 01:49:58,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:58,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-27 01:49:58,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:49:58,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-27 01:49:58,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:59,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:49:59,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:59,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:59,251 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:59,251 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:49:59,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:49:59,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:49:59,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:59,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:49:59,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:49:59,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:49:59,251 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:59,263 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 33 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:49:59,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1764359502] [2020-10-27 01:49:59,263 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:49:59,264 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-27 01:49:59,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37597894] [2020-10-27 01:49:59,264 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-27 01:49:59,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:49:59,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-27 01:49:59,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1159, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 01:49:59,265 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand 36 states. [2020-10-27 01:50:03,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:50:03,078 INFO L93 Difference]: Finished difference Result 90 states and 93 transitions. [2020-10-27 01:50:03,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-27 01:50:03,079 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 78 [2020-10-27 01:50:03,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:50:03,080 INFO L225 Difference]: With dead ends: 90 [2020-10-27 01:50:03,080 INFO L226 Difference]: Without dead ends: 81 [2020-10-27 01:50:03,081 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=297, Invalid=4395, Unknown=0, NotChecked=0, Total=4692 [2020-10-27 01:50:03,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-27 01:50:03,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-10-27 01:50:03,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-27 01:50:03,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2020-10-27 01:50:03,089 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 78 [2020-10-27 01:50:03,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:50:03,089 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2020-10-27 01:50:03,090 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-27 01:50:03,090 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2020-10-27 01:50:03,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-27 01:50:03,090 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:50:03,091 INFO L422 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:50:03,091 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-27 01:50:03,091 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:50:03,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:50:03,091 INFO L82 PathProgramCache]: Analyzing trace with hash 45251129, now seen corresponding path program 33 times [2020-10-27 01:50:03,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:50:03,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [889111339] [2020-10-27 01:50:03,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:50:03,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:50:03,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:03,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:04,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:50:04,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-27 01:50:04,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:50:04,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1055 [2020-10-27 01:50:04,167 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:50:04,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-27 01:50:04,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:50:04,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-27 01:50:04,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:50:05,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:50:05,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:50:05,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:05,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:50:05,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:50:05,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:50:05,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:50:05,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:50:05,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:50:05,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:50:05,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:50:05,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:50:05,388 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 34 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:50:05,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [889111339] [2020-10-27 01:50:05,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:50:05,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-27 01:50:05,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826218576] [2020-10-27 01:50:05,389 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-27 01:50:05,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:50:05,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-27 01:50:05,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1228, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 01:50:05,390 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 37 states. [2020-10-27 01:50:09,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:50:09,558 INFO L93 Difference]: Finished difference Result 92 states and 95 transitions. [2020-10-27 01:50:09,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-27 01:50:09,558 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 80 [2020-10-27 01:50:09,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:50:09,560 INFO L225 Difference]: With dead ends: 92 [2020-10-27 01:50:09,560 INFO L226 Difference]: Without dead ends: 83 [2020-10-27 01:50:09,561 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=306, Invalid=4664, Unknown=0, NotChecked=0, Total=4970 [2020-10-27 01:50:09,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-27 01:50:09,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2020-10-27 01:50:09,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-27 01:50:09,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2020-10-27 01:50:09,569 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 80 [2020-10-27 01:50:09,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:50:09,570 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2020-10-27 01:50:09,570 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-27 01:50:09,570 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2020-10-27 01:50:09,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-27 01:50:09,571 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:50:09,571 INFO L422 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:50:09,571 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-27 01:50:09,571 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:50:09,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:50:09,572 INFO L82 PathProgramCache]: Analyzing trace with hash 606812380, now seen corresponding path program 34 times [2020-10-27 01:50:09,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:50:09,572 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [608637310] [2020-10-27 01:50:09,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:50:09,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:50:09,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:09,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:10,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:50:10,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-27 01:50:10,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:50:10,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1298 [2020-10-27 01:50:10,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:50:10,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-27 01:50:10,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:50:10,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-27 01:50:10,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:50:12,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:50:12,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:50:12,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:12,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:50:12,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:50:12,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:50:12,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:50:12,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:50:12,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:50:12,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:50:12,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:50:12,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:50:12,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 35 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:50:12,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [608637310] [2020-10-27 01:50:12,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:50:12,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-27 01:50:12,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576155686] [2020-10-27 01:50:12,170 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-27 01:50:12,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:50:12,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-27 01:50:12,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1299, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 01:50:12,171 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand 38 states. [2020-10-27 01:50:16,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:50:16,558 INFO L93 Difference]: Finished difference Result 94 states and 97 transitions. [2020-10-27 01:50:16,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-27 01:50:16,559 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 82 [2020-10-27 01:50:16,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:50:16,560 INFO L225 Difference]: With dead ends: 94 [2020-10-27 01:50:16,560 INFO L226 Difference]: Without dead ends: 85 [2020-10-27 01:50:16,561 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=315, Invalid=4941, Unknown=0, NotChecked=0, Total=5256 [2020-10-27 01:50:16,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-27 01:50:16,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2020-10-27 01:50:16,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-27 01:50:16,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2020-10-27 01:50:16,569 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 82 [2020-10-27 01:50:16,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:50:16,569 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2020-10-27 01:50:16,569 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-27 01:50:16,569 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2020-10-27 01:50:16,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-27 01:50:16,570 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:50:16,570 INFO L422 BasicCegarLoop]: trace histogram [36, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:50:16,571 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-27 01:50:16,571 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:50:16,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:50:16,571 INFO L82 PathProgramCache]: Analyzing trace with hash -898704705, now seen corresponding path program 35 times [2020-10-27 01:50:16,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:50:16,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1408414061] [2020-10-27 01:50:16,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:50:16,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:50:16,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:16,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:18,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:50:18,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-27 01:50:18,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:50:18,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1758 [2020-10-27 01:50:18,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:50:18,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-27 01:50:18,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:50:18,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-27 01:50:18,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:50:19,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:50:19,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:50:19,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:19,752 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:50:19,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:50:19,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:50:19,753 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:50:19,753 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:50:19,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:50:19,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:50:19,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:50:19,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:50:19,767 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 36 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:50:19,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1408414061] [2020-10-27 01:50:19,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:50:19,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-27 01:50:19,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419471645] [2020-10-27 01:50:19,768 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-27 01:50:19,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:50:19,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-27 01:50:19,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 01:50:19,769 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand 39 states. [2020-10-27 01:50:24,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:50:24,392 INFO L93 Difference]: Finished difference Result 96 states and 99 transitions. [2020-10-27 01:50:24,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-27 01:50:24,392 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 84 [2020-10-27 01:50:24,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:50:24,393 INFO L225 Difference]: With dead ends: 96 [2020-10-27 01:50:24,394 INFO L226 Difference]: Without dead ends: 87 [2020-10-27 01:50:24,395 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=324, Invalid=5226, Unknown=0, NotChecked=0, Total=5550 [2020-10-27 01:50:24,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-27 01:50:24,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2020-10-27 01:50:24,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-27 01:50:24,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2020-10-27 01:50:24,402 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 84 [2020-10-27 01:50:24,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:50:24,402 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2020-10-27 01:50:24,402 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-27 01:50:24,402 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2020-10-27 01:50:24,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-27 01:50:24,403 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:50:24,403 INFO L422 BasicCegarLoop]: trace histogram [37, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:50:24,403 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-27 01:50:24,403 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:50:24,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:50:24,403 INFO L82 PathProgramCache]: Analyzing trace with hash -296644638, now seen corresponding path program 36 times [2020-10-27 01:50:24,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:50:24,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [716181627] [2020-10-27 01:50:24,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:50:24,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:50:24,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:24,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:26,038 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:50:26,038 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-27 01:50:26,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:50:26,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1618 [2020-10-27 01:50:26,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:50:26,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-27 01:50:26,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:50:26,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-27 01:50:26,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:50:27,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:50:27,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:50:27,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:27,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:50:27,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:50:27,484 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:50:27,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:50:27,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:50:27,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:50:27,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:50:27,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:50:27,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:50:27,500 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 37 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:50:27,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [716181627] [2020-10-27 01:50:27,500 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:50:27,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-27 01:50:27,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002797536] [2020-10-27 01:50:27,501 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-27 01:50:27,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:50:27,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-27 01:50:27,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1447, Unknown=0, NotChecked=0, Total=1560 [2020-10-27 01:50:27,501 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 40 states. [2020-10-27 01:50:32,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:50:32,346 INFO L93 Difference]: Finished difference Result 98 states and 101 transitions. [2020-10-27 01:50:32,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-27 01:50:32,350 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 86 [2020-10-27 01:50:32,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:50:32,351 INFO L225 Difference]: With dead ends: 98 [2020-10-27 01:50:32,351 INFO L226 Difference]: Without dead ends: 89 [2020-10-27 01:50:32,352 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=333, Invalid=5519, Unknown=0, NotChecked=0, Total=5852 [2020-10-27 01:50:32,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-27 01:50:32,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2020-10-27 01:50:32,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-27 01:50:32,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2020-10-27 01:50:32,358 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 86 [2020-10-27 01:50:32,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:50:32,358 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2020-10-27 01:50:32,359 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-27 01:50:32,359 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2020-10-27 01:50:32,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-27 01:50:32,359 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:50:32,359 INFO L422 BasicCegarLoop]: trace histogram [38, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:50:32,359 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-27 01:50:32,359 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:50:32,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:50:32,360 INFO L82 PathProgramCache]: Analyzing trace with hash -1537505211, now seen corresponding path program 37 times [2020-10-27 01:50:32,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:50:32,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [149002610] [2020-10-27 01:50:32,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:50:32,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:50:32,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:32,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:34,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:50:34,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-27 01:50:34,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:50:34,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1858 [2020-10-27 01:50:34,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:50:34,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-27 01:50:34,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:50:34,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-27 01:50:34,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:50:35,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:50:35,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:50:35,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:35,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:50:35,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:50:35,717 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:50:35,717 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:50:35,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:50:35,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:50:35,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:50:35,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:50:35,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:50:35,732 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 38 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:50:35,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [149002610] [2020-10-27 01:50:35,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:50:35,733 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-27 01:50:35,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139924439] [2020-10-27 01:50:35,733 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-27 01:50:35,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:50:35,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-27 01:50:35,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1524, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 01:50:35,734 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand 41 states. [2020-10-27 01:50:40,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:50:40,740 INFO L93 Difference]: Finished difference Result 100 states and 103 transitions. [2020-10-27 01:50:40,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-27 01:50:40,741 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 88 [2020-10-27 01:50:40,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:50:40,742 INFO L225 Difference]: With dead ends: 100 [2020-10-27 01:50:40,742 INFO L226 Difference]: Without dead ends: 91 [2020-10-27 01:50:40,743 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=342, Invalid=5820, Unknown=0, NotChecked=0, Total=6162 [2020-10-27 01:50:40,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-27 01:50:40,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2020-10-27 01:50:40,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-27 01:50:40,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2020-10-27 01:50:40,753 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 88 [2020-10-27 01:50:40,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:50:40,753 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2020-10-27 01:50:40,753 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-27 01:50:40,753 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2020-10-27 01:50:40,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-27 01:50:40,754 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:50:40,754 INFO L422 BasicCegarLoop]: trace histogram [39, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:50:40,754 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-27 01:50:40,754 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:50:40,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:50:40,755 INFO L82 PathProgramCache]: Analyzing trace with hash -3607576, now seen corresponding path program 38 times [2020-10-27 01:50:40,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:50:40,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [904762052] [2020-10-27 01:50:40,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:50:40,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:50:40,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:41,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:42,509 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:50:42,509 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-27 01:50:42,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:50:42,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1733 [2020-10-27 01:50:42,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:50:42,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-27 01:50:42,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:50:42,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-27 01:50:42,510 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:50:44,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:50:44,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:50:44,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:44,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:50:44,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:50:44,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:50:44,047 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:50:44,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:50:44,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:50:44,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:50:44,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:50:44,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:50:44,063 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 39 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:50:44,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [904762052] [2020-10-27 01:50:44,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:50:44,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-27 01:50:44,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502252664] [2020-10-27 01:50:44,064 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-27 01:50:44,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:50:44,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-27 01:50:44,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1603, Unknown=0, NotChecked=0, Total=1722 [2020-10-27 01:50:44,065 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand 42 states. [2020-10-27 01:50:49,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:50:49,462 INFO L93 Difference]: Finished difference Result 102 states and 105 transitions. [2020-10-27 01:50:49,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-27 01:50:49,462 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 90 [2020-10-27 01:50:49,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:50:49,463 INFO L225 Difference]: With dead ends: 102 [2020-10-27 01:50:49,464 INFO L226 Difference]: Without dead ends: 93 [2020-10-27 01:50:49,465 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 742 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=351, Invalid=6129, Unknown=0, NotChecked=0, Total=6480 [2020-10-27 01:50:49,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-27 01:50:49,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2020-10-27 01:50:49,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-27 01:50:49,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2020-10-27 01:50:49,474 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 90 [2020-10-27 01:50:49,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:50:49,474 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2020-10-27 01:50:49,474 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-27 01:50:49,475 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2020-10-27 01:50:49,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-27 01:50:49,475 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:50:49,475 INFO L422 BasicCegarLoop]: trace histogram [40, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:50:49,476 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-27 01:50:49,476 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:50:49,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:50:49,476 INFO L82 PathProgramCache]: Analyzing trace with hash 898237131, now seen corresponding path program 39 times [2020-10-27 01:50:49,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:50:49,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1813385296] [2020-10-27 01:50:49,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:50:49,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:50:49,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:51,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:51,922 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:50:51,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-27 01:50:51,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:50:51,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2422 [2020-10-27 01:50:51,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:50:51,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-27 01:50:51,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:50:51,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-27 01:50:51,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:50:53,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:50:53,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:50:53,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:50:53,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:50:53,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:50:53,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:50:53,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:50:53,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:50:53,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:50:53,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:50:53,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:50:53,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:50:53,560 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 40 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:50:53,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1813385296] [2020-10-27 01:50:53,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:50:53,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-27 01:50:53,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238875981] [2020-10-27 01:50:53,561 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-27 01:50:53,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:50:53,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-27 01:50:53,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1684, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 01:50:53,562 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand 43 states. [2020-10-27 01:50:59,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:50:59,099 INFO L93 Difference]: Finished difference Result 104 states and 107 transitions. [2020-10-27 01:50:59,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-27 01:50:59,100 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 92 [2020-10-27 01:50:59,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:50:59,101 INFO L225 Difference]: With dead ends: 104 [2020-10-27 01:50:59,101 INFO L226 Difference]: Without dead ends: 95 [2020-10-27 01:50:59,102 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 781 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=360, Invalid=6446, Unknown=0, NotChecked=0, Total=6806 [2020-10-27 01:50:59,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-27 01:50:59,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2020-10-27 01:50:59,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-27 01:50:59,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2020-10-27 01:50:59,110 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 92 [2020-10-27 01:50:59,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:50:59,111 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2020-10-27 01:50:59,111 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-27 01:50:59,111 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2020-10-27 01:50:59,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-27 01:50:59,112 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:50:59,112 INFO L422 BasicCegarLoop]: trace histogram [41, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:50:59,112 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-27 01:50:59,112 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:50:59,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:50:59,112 INFO L82 PathProgramCache]: Analyzing trace with hash -12393234, now seen corresponding path program 40 times [2020-10-27 01:50:59,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:50:59,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [572987469] [2020-10-27 01:50:59,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:50:59,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:50:59,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:00,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:01,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:51:01,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-27 01:51:01,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:51:01,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1903 [2020-10-27 01:51:01,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:51:01,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-27 01:51:01,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:51:01,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-27 01:51:01,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:51:02,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:51:02,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:51:02,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:02,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:51:02,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:51:02,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:51:02,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:51:02,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:51:02,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:51:02,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:51:02,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:51:02,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:51:02,783 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 41 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:51:02,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [572987469] [2020-10-27 01:51:02,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:51:02,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-27 01:51:02,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509583909] [2020-10-27 01:51:02,783 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-27 01:51:02,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:51:02,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-27 01:51:02,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1767, Unknown=0, NotChecked=0, Total=1892 [2020-10-27 01:51:02,784 INFO L87 Difference]: Start difference. First operand 95 states and 96 transitions. Second operand 44 states. [2020-10-27 01:51:08,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:51:08,582 INFO L93 Difference]: Finished difference Result 106 states and 109 transitions. [2020-10-27 01:51:08,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-27 01:51:08,583 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 94 [2020-10-27 01:51:08,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:51:08,584 INFO L225 Difference]: With dead ends: 106 [2020-10-27 01:51:08,584 INFO L226 Difference]: Without dead ends: 97 [2020-10-27 01:51:08,586 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 821 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=369, Invalid=6771, Unknown=0, NotChecked=0, Total=7140 [2020-10-27 01:51:08,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-27 01:51:08,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2020-10-27 01:51:08,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-27 01:51:08,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2020-10-27 01:51:08,595 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 94 [2020-10-27 01:51:08,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:51:08,595 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2020-10-27 01:51:08,595 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-27 01:51:08,595 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2020-10-27 01:51:08,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-27 01:51:08,596 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:51:08,596 INFO L422 BasicCegarLoop]: trace histogram [42, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:51:08,596 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-27 01:51:08,596 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:51:08,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:51:08,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1045154385, now seen corresponding path program 41 times [2020-10-27 01:51:08,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:51:08,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1110147674] [2020-10-27 01:51:08,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:51:08,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:51:08,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:08,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:10,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:51:10,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-27 01:51:10,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:51:10,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2378 [2020-10-27 01:51:10,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:51:10,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-27 01:51:10,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:51:10,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 85 [2020-10-27 01:51:10,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:51:12,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:51:12,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:51:12,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:12,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:51:12,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:51:12,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:51:12,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:51:12,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:51:12,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:51:12,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:51:12,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:51:12,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:51:12,791 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 42 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:51:12,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1110147674] [2020-10-27 01:51:12,791 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:51:12,791 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-27 01:51:12,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844700685] [2020-10-27 01:51:12,792 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-27 01:51:12,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:51:12,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-27 01:51:12,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1852, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 01:51:12,792 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand 45 states. [2020-10-27 01:51:18,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:51:18,777 INFO L93 Difference]: Finished difference Result 108 states and 111 transitions. [2020-10-27 01:51:18,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-27 01:51:18,778 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 96 [2020-10-27 01:51:18,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:51:18,779 INFO L225 Difference]: With dead ends: 108 [2020-10-27 01:51:18,779 INFO L226 Difference]: Without dead ends: 99 [2020-10-27 01:51:18,780 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 862 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=378, Invalid=7104, Unknown=0, NotChecked=0, Total=7482 [2020-10-27 01:51:18,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-27 01:51:18,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2020-10-27 01:51:18,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-27 01:51:18,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2020-10-27 01:51:18,789 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 96 [2020-10-27 01:51:18,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:51:18,789 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2020-10-27 01:51:18,789 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-27 01:51:18,789 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2020-10-27 01:51:18,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-27 01:51:18,790 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:51:18,790 INFO L422 BasicCegarLoop]: trace histogram [43, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:51:18,790 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-27 01:51:18,790 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:51:18,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:51:18,791 INFO L82 PathProgramCache]: Analyzing trace with hash -558832908, now seen corresponding path program 42 times [2020-10-27 01:51:18,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:51:18,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1964418605] [2020-10-27 01:51:18,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:51:18,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:51:18,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:18,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:20,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:51:20,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-27 01:51:20,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:51:20,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1921 [2020-10-27 01:51:20,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:51:20,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-27 01:51:20,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:51:20,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-27 01:51:20,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:51:22,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:51:22,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:51:22,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:22,607 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:51:22,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:51:22,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:51:22,608 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:51:22,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:51:22,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:51:22,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:51:22,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:51:22,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:51:22,624 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 43 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:51:22,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1964418605] [2020-10-27 01:51:22,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:51:22,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-27 01:51:22,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859242401] [2020-10-27 01:51:22,626 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-27 01:51:22,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:51:22,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-27 01:51:22,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1939, Unknown=0, NotChecked=0, Total=2070 [2020-10-27 01:51:22,626 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand 46 states. [2020-10-27 01:51:28,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:51:28,884 INFO L93 Difference]: Finished difference Result 110 states and 113 transitions. [2020-10-27 01:51:28,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-27 01:51:28,885 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 98 [2020-10-27 01:51:28,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:51:28,886 INFO L225 Difference]: With dead ends: 110 [2020-10-27 01:51:28,886 INFO L226 Difference]: Without dead ends: 101 [2020-10-27 01:51:28,887 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 904 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=387, Invalid=7445, Unknown=0, NotChecked=0, Total=7832 [2020-10-27 01:51:28,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-27 01:51:28,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2020-10-27 01:51:28,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-27 01:51:28,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2020-10-27 01:51:28,897 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 98 [2020-10-27 01:51:28,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:51:28,897 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2020-10-27 01:51:28,898 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-27 01:51:28,898 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2020-10-27 01:51:28,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-27 01:51:28,898 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:51:28,898 INFO L422 BasicCegarLoop]: trace histogram [44, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:51:28,899 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-27 01:51:28,899 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:51:28,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:51:28,899 INFO L82 PathProgramCache]: Analyzing trace with hash -97362217, now seen corresponding path program 43 times [2020-10-27 01:51:28,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:51:28,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [220754707] [2020-10-27 01:51:28,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:51:28,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:51:28,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:30,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:31,790 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:51:31,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-27 01:51:31,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:51:31,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2870 [2020-10-27 01:51:31,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:51:31,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-27 01:51:31,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:51:31,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 89 [2020-10-27 01:51:31,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:51:33,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:51:33,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:51:33,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:33,729 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:51:33,729 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:51:33,729 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:51:33,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:51:33,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:51:33,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:51:33,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:51:33,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:51:33,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:51:33,753 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 44 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:51:33,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [220754707] [2020-10-27 01:51:33,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:51:33,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-27 01:51:33,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195364770] [2020-10-27 01:51:33,754 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-27 01:51:33,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:51:33,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-27 01:51:33,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=2028, Unknown=0, NotChecked=0, Total=2162 [2020-10-27 01:51:33,755 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand 47 states. [2020-10-27 01:51:40,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:51:40,399 INFO L93 Difference]: Finished difference Result 112 states and 115 transitions. [2020-10-27 01:51:40,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-27 01:51:40,400 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 100 [2020-10-27 01:51:40,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:51:40,401 INFO L225 Difference]: With dead ends: 112 [2020-10-27 01:51:40,401 INFO L226 Difference]: Without dead ends: 103 [2020-10-27 01:51:40,402 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 947 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=396, Invalid=7794, Unknown=0, NotChecked=0, Total=8190 [2020-10-27 01:51:40,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-27 01:51:40,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2020-10-27 01:51:40,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-27 01:51:40,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2020-10-27 01:51:40,411 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 100 [2020-10-27 01:51:40,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:51:40,411 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2020-10-27 01:51:40,411 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-27 01:51:40,411 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2020-10-27 01:51:40,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-27 01:51:40,412 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:51:40,412 INFO L422 BasicCegarLoop]: trace histogram [45, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:51:40,412 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-27 01:51:40,412 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:51:40,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:51:40,413 INFO L82 PathProgramCache]: Analyzing trace with hash 994340346, now seen corresponding path program 44 times [2020-10-27 01:51:40,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:51:40,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [560440605] [2020-10-27 01:51:40,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:51:40,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:51:40,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:42,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:43,291 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:51:43,291 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-27 01:51:43,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:51:43,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2851 [2020-10-27 01:51:43,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:51:43,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-27 01:51:43,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:51:43,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 91 [2020-10-27 01:51:43,292 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:51:45,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:51:45,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:51:45,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:45,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:51:45,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:51:45,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:51:45,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:51:45,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:51:45,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:51:45,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:51:45,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:51:45,348 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:51:45,366 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 45 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:51:45,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [560440605] [2020-10-27 01:51:45,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:51:45,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-27 01:51:45,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895218322] [2020-10-27 01:51:45,367 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-27 01:51:45,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:51:45,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-27 01:51:45,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=2119, Unknown=0, NotChecked=0, Total=2256 [2020-10-27 01:51:45,367 INFO L87 Difference]: Start difference. First operand 103 states and 104 transitions. Second operand 48 states. [2020-10-27 01:51:52,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:51:52,398 INFO L93 Difference]: Finished difference Result 114 states and 117 transitions. [2020-10-27 01:51:52,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-27 01:51:52,399 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 102 [2020-10-27 01:51:52,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:51:52,400 INFO L225 Difference]: With dead ends: 114 [2020-10-27 01:51:52,400 INFO L226 Difference]: Without dead ends: 105 [2020-10-27 01:51:52,401 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 991 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=405, Invalid=8151, Unknown=0, NotChecked=0, Total=8556 [2020-10-27 01:51:52,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-27 01:51:52,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2020-10-27 01:51:52,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-27 01:51:52,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2020-10-27 01:51:52,411 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 102 [2020-10-27 01:51:52,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:51:52,411 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2020-10-27 01:51:52,411 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-27 01:51:52,411 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2020-10-27 01:51:52,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-27 01:51:52,412 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:51:52,412 INFO L422 BasicCegarLoop]: trace histogram [46, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:51:52,412 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-27 01:51:52,412 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:51:52,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:51:52,413 INFO L82 PathProgramCache]: Analyzing trace with hash -2146484131, now seen corresponding path program 45 times [2020-10-27 01:51:52,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:51:52,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2040057720] [2020-10-27 01:51:52,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:51:52,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:51:52,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:54,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:54,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:51:54,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-27 01:51:54,517 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:51:54,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2077 [2020-10-27 01:51:54,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:51:54,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-27 01:51:54,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:51:54,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 93 [2020-10-27 01:51:54,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:51:56,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:51:56,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:51:56,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:56,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:51:56,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:51:56,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:51:56,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:51:56,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:51:56,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:51:56,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:51:56,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:51:56,655 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:51:56,683 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 46 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:51:56,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2040057720] [2020-10-27 01:51:56,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:51:56,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-27 01:51:56,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920846325] [2020-10-27 01:51:56,684 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-27 01:51:56,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:51:56,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-27 01:51:56,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=2212, Unknown=0, NotChecked=0, Total=2352 [2020-10-27 01:51:56,684 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand 49 states. [2020-10-27 01:52:04,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:52:04,058 INFO L93 Difference]: Finished difference Result 116 states and 119 transitions. [2020-10-27 01:52:04,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-27 01:52:04,059 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 104 [2020-10-27 01:52:04,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:52:04,061 INFO L225 Difference]: With dead ends: 116 [2020-10-27 01:52:04,061 INFO L226 Difference]: Without dead ends: 107 [2020-10-27 01:52:04,062 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1036 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=414, Invalid=8516, Unknown=0, NotChecked=0, Total=8930 [2020-10-27 01:52:04,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-27 01:52:04,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2020-10-27 01:52:04,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-27 01:52:04,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 108 transitions. [2020-10-27 01:52:04,070 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 108 transitions. Word has length 104 [2020-10-27 01:52:04,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:52:04,070 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 108 transitions. [2020-10-27 01:52:04,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-27 01:52:04,071 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 108 transitions. [2020-10-27 01:52:04,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-27 01:52:04,071 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:52:04,071 INFO L422 BasicCegarLoop]: trace histogram [47, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:52:04,072 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-27 01:52:04,072 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:52:04,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:52:04,072 INFO L82 PathProgramCache]: Analyzing trace with hash -1116797440, now seen corresponding path program 46 times [2020-10-27 01:52:04,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:52:04,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1969923031] [2020-10-27 01:52:04,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:52:04,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:52:04,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:06,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:07,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:52:07,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-27 01:52:07,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:52:07,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3078 [2020-10-27 01:52:07,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:52:07,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-27 01:52:07,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:52:07,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-27 01:52:07,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:52:09,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:52:09,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:52:09,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:09,395 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:52:09,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:52:09,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:52:09,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:52:09,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:52:09,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:52:09,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:52:09,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:52:09,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:52:09,415 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 47 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:52:09,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1969923031] [2020-10-27 01:52:09,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:52:09,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-27 01:52:09,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9362301] [2020-10-27 01:52:09,416 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-27 01:52:09,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:52:09,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-27 01:52:09,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=2307, Unknown=0, NotChecked=0, Total=2450 [2020-10-27 01:52:09,416 INFO L87 Difference]: Start difference. First operand 107 states and 108 transitions. Second operand 50 states. [2020-10-27 01:52:17,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:52:17,079 INFO L93 Difference]: Finished difference Result 118 states and 121 transitions. [2020-10-27 01:52:17,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-27 01:52:17,080 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 106 [2020-10-27 01:52:17,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:52:17,081 INFO L225 Difference]: With dead ends: 118 [2020-10-27 01:52:17,081 INFO L226 Difference]: Without dead ends: 109 [2020-10-27 01:52:17,082 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1082 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=423, Invalid=8889, Unknown=0, NotChecked=0, Total=9312 [2020-10-27 01:52:17,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-27 01:52:17,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2020-10-27 01:52:17,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-27 01:52:17,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2020-10-27 01:52:17,092 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 106 [2020-10-27 01:52:17,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:52:17,093 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2020-10-27 01:52:17,093 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-27 01:52:17,093 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2020-10-27 01:52:17,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-27 01:52:17,093 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:52:17,093 INFO L422 BasicCegarLoop]: trace histogram [48, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:52:17,093 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-27 01:52:17,094 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:52:17,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:52:17,094 INFO L82 PathProgramCache]: Analyzing trace with hash 569634531, now seen corresponding path program 47 times [2020-10-27 01:52:17,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:52:17,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [325423722] [2020-10-27 01:52:17,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:52:17,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:52:17,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:18,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:19,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:52:19,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-27 01:52:19,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:52:19,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2693 [2020-10-27 01:52:19,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:52:19,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 49 [2020-10-27 01:52:19,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:52:19,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 97 [2020-10-27 01:52:19,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:52:22,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:52:22,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:52:22,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:52:22,127 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:52:22,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:52:22,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:52:22,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:52:22,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:52:22,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:52:22,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:52:22,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:52:22,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:52:22,149 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 48 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:52:22,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [325423722] [2020-10-27 01:52:22,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:52:22,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-10-27 01:52:22,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12320821] [2020-10-27 01:52:22,150 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-27 01:52:22,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:52:22,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-27 01:52:22,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=2404, Unknown=0, NotChecked=0, Total=2550 [2020-10-27 01:52:22,151 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand 51 states.