/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --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/loop-acceleration/array_2-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 09:33:52,352 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 09:33:52,355 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 09:33:52,393 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 09:33:52,394 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 09:33:52,396 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 09:33:52,397 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 09:33:52,400 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 09:33:52,402 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 09:33:52,403 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 09:33:52,405 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 09:33:52,406 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 09:33:52,407 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 09:33:52,408 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 09:33:52,409 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 09:33:52,411 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 09:33:52,412 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 09:33:52,413 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 09:33:52,415 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 09:33:52,418 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 09:33:52,420 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 09:33:52,422 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 09:33:52,423 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 09:33:52,424 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 09:33:52,428 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 09:33:52,445 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 09:33:52,445 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 09:33:52,446 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 09:33:52,447 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 09:33:52,448 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 09:33:52,448 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 09:33:52,452 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 09:33:52,454 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 09:33:52,455 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 09:33:52,456 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 09:33:52,456 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 09:33:52,457 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 09:33:52,457 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 09:33:52,458 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 09:33:52,459 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 09:33:52,460 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 09:33:52,461 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 [2020-10-29 09:33:52,490 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 09:33:52,490 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 09:33:52,492 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 09:33:52,492 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 09:33:52,492 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 09:33:52,492 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 09:33:52,493 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 09:33:52,493 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 09:33:52,493 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 09:33:52,493 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 09:33:52,493 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 09:33:52,494 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 09:33:52,494 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 09:33:52,494 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 09:33:52,494 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 09:33:52,495 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 09:33:52,495 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 09:33:52,495 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 09:33:52,495 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 09:33:52,495 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 09:33:52,496 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 09:33:52,496 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 09:33:52,496 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 09:33:52,496 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 09:33:52,496 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 09:33:52,497 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 09:33:52,497 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 09:33:52,497 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 09:33:52,497 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 09:33:52,497 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 09:33:52,886 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 09:33:52,918 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 09:33:52,923 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 09:33:52,924 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 09:33:52,925 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 09:33:52,928 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_2-2.i [2020-10-29 09:33:53,019 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/672c0abbb/d554bd8785d54195bb9667308e32311a/FLAG654494fde [2020-10-29 09:33:53,793 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 09:33:53,793 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/array_2-2.i [2020-10-29 09:33:53,801 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/672c0abbb/d554bd8785d54195bb9667308e32311a/FLAG654494fde [2020-10-29 09:33:54,138 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/672c0abbb/d554bd8785d54195bb9667308e32311a [2020-10-29 09:33:54,142 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 09:33:54,153 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 09:33:54,156 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 09:33:54,156 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 09:33:54,161 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 09:33:54,163 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:33:54" (1/1) ... [2020-10-29 09:33:54,168 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d670427 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:33:54, skipping insertion in model container [2020-10-29 09:33:54,168 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:33:54" (1/1) ... [2020-10-29 09:33:54,178 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 09:33:54,197 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 09:33:54,400 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:33:54,410 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 09:33:54,444 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:33:54,470 INFO L208 MainTranslator]: Completed translation [2020-10-29 09:33:54,471 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:33:54 WrapperNode [2020-10-29 09:33:54,471 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 09:33:54,472 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 09:33:54,473 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 09:33:54,473 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 09:33:54,490 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:33:54" (1/1) ... [2020-10-29 09:33:54,493 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:33:54" (1/1) ... [2020-10-29 09:33:54,506 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:33:54" (1/1) ... [2020-10-29 09:33:54,507 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:33:54" (1/1) ... [2020-10-29 09:33:54,534 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:33:54" (1/1) ... [2020-10-29 09:33:54,541 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:33:54" (1/1) ... [2020-10-29 09:33:54,549 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:33:54" (1/1) ... [2020-10-29 09:33:54,555 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 09:33:54,557 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 09:33:54,557 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 09:33:54,557 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 09:33:54,559 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:33:54" (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 [2020-10-29 09:33:54,653 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 09:33:54,654 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 09:33:54,654 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 09:33:54,654 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-29 09:33:54,654 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 09:33:54,655 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 09:33:54,655 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 09:33:54,655 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-29 09:33:54,655 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-29 09:33:54,655 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 09:33:54,655 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 09:33:54,656 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-29 09:33:54,656 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-29 09:33:54,656 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 09:33:54,656 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 09:33:54,656 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 09:33:54,656 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 09:33:54,656 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 09:33:54,657 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 09:33:54,657 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 09:33:55,176 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 09:33:55,177 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-29 09:33:55,179 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:33:55 BoogieIcfgContainer [2020-10-29 09:33:55,179 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 09:33:55,181 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 09:33:55,182 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 09:33:55,186 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 09:33:55,186 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 09:33:54" (1/3) ... [2020-10-29 09:33:55,187 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5197409e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:33:55, skipping insertion in model container [2020-10-29 09:33:55,187 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:33:54" (2/3) ... [2020-10-29 09:33:55,188 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5197409e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:33:55, skipping insertion in model container [2020-10-29 09:33:55,188 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:33:55" (3/3) ... [2020-10-29 09:33:55,190 INFO L111 eAbstractionObserver]: Analyzing ICFG array_2-2.i [2020-10-29 09:33:55,206 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 09:33:55,212 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 09:33:55,229 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 09:33:55,263 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 09:33:55,264 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 09:33:55,264 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 09:33:55,264 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 09:33:55,264 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 09:33:55,265 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 09:33:55,265 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 09:33:55,265 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 09:33:55,288 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-10-29 09:33:55,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-29 09:33:55,294 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:33:55,296 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:33:55,296 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:33:55,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:33:55,304 INFO L82 PathProgramCache]: Analyzing trace with hash 1359145685, now seen corresponding path program 1 times [2020-10-29 09:33:55,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:33:55,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1119540204] [2020-10-29 09:33:55,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:33:55,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:55,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:55,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:55,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:55,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-29 09:33:55,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:33:55,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 236 [2020-10-29 09:33:55,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:55,706 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:55,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:33:55,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 09:33:55,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:33:55,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-29 09:33:55,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:33:55,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:55,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:55,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:55,849 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:33:55,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:33:55,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 09:33:55,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:55,850 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:55,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:33:55,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:33:55,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:33:55,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:33:55,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:33:55,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1119540204] [2020-10-29 09:33:55,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:33:55,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-29 09:33:55,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655866693] [2020-10-29 09:33:55,875 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-29 09:33:55,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:33:55,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-29 09:33:55,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-29 09:33:55,899 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 3 states. [2020-10-29 09:33:56,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:33:56,023 INFO L93 Difference]: Finished difference Result 47 states and 57 transitions. [2020-10-29 09:33:56,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-29 09:33:56,026 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-10-29 09:33:56,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:33:56,035 INFO L225 Difference]: With dead ends: 47 [2020-10-29 09:33:56,036 INFO L226 Difference]: Without dead ends: 19 [2020-10-29 09:33:56,040 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 [2020-10-29 09:33:56,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-29 09:33:56,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-29 09:33:56,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-29 09:33:56,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-10-29 09:33:56,086 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 16 [2020-10-29 09:33:56,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:33:56,087 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-10-29 09:33:56,087 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-29 09:33:56,087 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-10-29 09:33:56,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-29 09:33:56,088 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:33:56,088 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:33:56,089 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 09:33:56,089 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:33:56,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:33:56,090 INFO L82 PathProgramCache]: Analyzing trace with hash 671299297, now seen corresponding path program 1 times [2020-10-29 09:33:56,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:33:56,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [535331724] [2020-10-29 09:33:56,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:33:56,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:56,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:56,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:56,283 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:56,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-29 09:33:56,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:33:56,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 173 [2020-10-29 09:33:56,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:56,284 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:56,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:33:56,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:33:56,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 09:33:56,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:33:56,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:33:56,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:56,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:56,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:56,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:33:56,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:33:56,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 09:33:56,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:56,376 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:56,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:33:56,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:33:56,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:33:56,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:33:56,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:33:56,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [535331724] [2020-10-29 09:33:56,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:33:56,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:33:56,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826106537] [2020-10-29 09:33:56,387 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:33:56,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:33:56,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:33:56,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:33:56,389 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 4 states. [2020-10-29 09:33:56,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:33:56,467 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2020-10-29 09:33:56,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:33:56,468 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-10-29 09:33:56,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:33:56,469 INFO L225 Difference]: With dead ends: 34 [2020-10-29 09:33:56,469 INFO L226 Difference]: Without dead ends: 23 [2020-10-29 09:33:56,470 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:33:56,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-29 09:33:56,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2020-10-29 09:33:56,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-29 09:33:56,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-10-29 09:33:56,479 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 16 [2020-10-29 09:33:56,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:33:56,479 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-10-29 09:33:56,479 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:33:56,479 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-10-29 09:33:56,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-29 09:33:56,480 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:33:56,481 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:33:56,481 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 09:33:56,481 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:33:56,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:33:56,482 INFO L82 PathProgramCache]: Analyzing trace with hash 1983033189, now seen corresponding path program 1 times [2020-10-29 09:33:56,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:33:56,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1641289204] [2020-10-29 09:33:56,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:33:56,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:56,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:56,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:56,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:56,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-29 09:33:56,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:33:56,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 452 [2020-10-29 09:33:56,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:56,955 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:56,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 09:33:56,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:33:56,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-29 09:33:56,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:33:57,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:33:57,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:57,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:57,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:57,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:33:57,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:33:57,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 09:33:57,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:57,055 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:57,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:33:57,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:33:57,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:33:57,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:33:57,061 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-29 09:33:57,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1641289204] [2020-10-29 09:33:57,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:33:57,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-29 09:33:57,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291190988] [2020-10-29 09:33:57,063 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 09:33:57,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:33:57,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 09:33:57,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:33:57,065 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 5 states. [2020-10-29 09:33:57,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:33:57,148 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2020-10-29 09:33:57,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 09:33:57,149 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-10-29 09:33:57,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:33:57,150 INFO L225 Difference]: With dead ends: 39 [2020-10-29 09:33:57,150 INFO L226 Difference]: Without dead ends: 27 [2020-10-29 09:33:57,151 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:33:57,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-29 09:33:57,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2020-10-29 09:33:57,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-29 09:33:57,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2020-10-29 09:33:57,159 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 20 [2020-10-29 09:33:57,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:33:57,159 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2020-10-29 09:33:57,160 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 09:33:57,160 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2020-10-29 09:33:57,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-29 09:33:57,161 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:33:57,161 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:33:57,161 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 09:33:57,161 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:33:57,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:33:57,162 INFO L82 PathProgramCache]: Analyzing trace with hash -432056855, now seen corresponding path program 2 times [2020-10-29 09:33:57,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:33:57,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1606519457] [2020-10-29 09:33:57,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:33:57,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:57,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:57,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:57,754 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:57,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-29 09:33:57,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:33:57,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 572 [2020-10-29 09:33:57,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:57,755 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:57,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 09:33:57,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:33:57,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 09:33:57,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:33:57,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:33:57,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:57,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:57,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:57,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:33:57,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:33:57,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:33:57,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:57,819 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:57,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:33:57,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:33:57,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:33:57,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:33:57,825 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-29 09:33:57,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1606519457] [2020-10-29 09:33:57,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:33:57,826 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-29 09:33:57,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153565685] [2020-10-29 09:33:57,827 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 09:33:57,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:33:57,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 09:33:57,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-29 09:33:57,829 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 6 states. [2020-10-29 09:33:57,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:33:57,910 INFO L93 Difference]: Finished difference Result 45 states and 48 transitions. [2020-10-29 09:33:57,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 09:33:57,911 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2020-10-29 09:33:57,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:33:57,912 INFO L225 Difference]: With dead ends: 45 [2020-10-29 09:33:57,912 INFO L226 Difference]: Without dead ends: 31 [2020-10-29 09:33:57,913 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-29 09:33:57,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-29 09:33:57,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2020-10-29 09:33:57,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-29 09:33:57,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2020-10-29 09:33:57,920 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 24 [2020-10-29 09:33:57,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:33:57,920 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2020-10-29 09:33:57,920 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 09:33:57,921 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2020-10-29 09:33:57,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-29 09:33:57,922 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:33:57,922 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:33:57,922 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 09:33:57,922 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:33:57,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:33:57,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1490954861, now seen corresponding path program 3 times [2020-10-29 09:33:57,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:33:57,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1600190215] [2020-10-29 09:33:57,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:33:57,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:57,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:57,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:58,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:58,645 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-29 09:33:58,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:33:58,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 706 [2020-10-29 09:33:58,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:58,646 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:58,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 09:33:58,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-29 09:33:58,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-29 09:33:58,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:58,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:33:58,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:58,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:58,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:58,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:33:58,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:33:58,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:33:58,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:58,715 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:58,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:33:58,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:33:58,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:33:58,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:58,720 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-29 09:33:58,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1600190215] [2020-10-29 09:33:58,721 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:33:58,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 09:33:58,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521720758] [2020-10-29 09:33:58,722 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 09:33:58,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:33:58,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 09:33:58,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-29 09:33:58,723 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 7 states. [2020-10-29 09:33:58,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:33:58,833 INFO L93 Difference]: Finished difference Result 51 states and 54 transitions. [2020-10-29 09:33:58,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 09:33:58,833 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2020-10-29 09:33:58,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:33:58,834 INFO L225 Difference]: With dead ends: 51 [2020-10-29 09:33:58,834 INFO L226 Difference]: Without dead ends: 35 [2020-10-29 09:33:58,835 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-29 09:33:58,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-29 09:33:58,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2020-10-29 09:33:58,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-29 09:33:58,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-10-29 09:33:58,843 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 28 [2020-10-29 09:33:58,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:33:58,844 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-10-29 09:33:58,844 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 09:33:58,844 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-10-29 09:33:58,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-29 09:33:58,845 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:33:58,845 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:33:58,845 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 09:33:58,846 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:33:58,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:33:58,847 INFO L82 PathProgramCache]: Analyzing trace with hash 2101619953, now seen corresponding path program 4 times [2020-10-29 09:33:58,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:33:58,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [568991205] [2020-10-29 09:33:58,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:33:58,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:58,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:58,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:34:00,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:34:00,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-29 09:34:00,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:34:00,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1452 [2020-10-29 09:34:00,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:34:00,319 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:34:00,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:34:00,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:34:00,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-29 09:34:00,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:34:00,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:34:00,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:34:00,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:34:00,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:34:00,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:34:00,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:34:00,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:34:00,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:34:00,402 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:34:00,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:34:00,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:34:00,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:34:00,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:34:00,408 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-29 09:34:00,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [568991205] [2020-10-29 09:34:00,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:34:00,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 09:34:00,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431966079] [2020-10-29 09:34:00,410 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 09:34:00,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:34:00,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 09:34:00,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:34:00,411 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 8 states. [2020-10-29 09:34:00,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:34:00,522 INFO L93 Difference]: Finished difference Result 57 states and 60 transitions. [2020-10-29 09:34:00,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 09:34:00,523 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2020-10-29 09:34:00,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:34:00,524 INFO L225 Difference]: With dead ends: 57 [2020-10-29 09:34:00,524 INFO L226 Difference]: Without dead ends: 39 [2020-10-29 09:34:00,525 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:34:00,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-29 09:34:00,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2020-10-29 09:34:00,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-29 09:34:00,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2020-10-29 09:34:00,534 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 32 [2020-10-29 09:34:00,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:34:00,534 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2020-10-29 09:34:00,534 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 09:34:00,535 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2020-10-29 09:34:00,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-29 09:34:00,536 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:34:00,536 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:34:00,536 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 09:34:00,536 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:34:00,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:34:00,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1361468789, now seen corresponding path program 5 times [2020-10-29 09:34:00,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:34:00,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1084290823] [2020-10-29 09:34:00,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:34:00,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:34:00,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:34:00,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:34:03,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:34:03,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-29 09:34:03,173 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:34:03,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2601 [2020-10-29 09:34:03,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:34:03,173 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:34:03,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 09:34:03,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-29 09:34:03,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-29 09:34:03,174 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:34:03,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:34:03,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:34:03,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:34:03,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:34:03,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:34:03,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:34:03,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:34:03,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:34:03,267 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:34:03,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:34:03,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:34:03,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:34:03,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:34:03,273 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-29 09:34:03,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1084290823] [2020-10-29 09:34:03,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:34:03,274 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 09:34:03,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747727896] [2020-10-29 09:34:03,275 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 09:34:03,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:34:03,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 09:34:03,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:34:03,277 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 9 states. [2020-10-29 09:34:03,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:34:03,399 INFO L93 Difference]: Finished difference Result 63 states and 66 transitions. [2020-10-29 09:34:03,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 09:34:03,400 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 36 [2020-10-29 09:34:03,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:34:03,401 INFO L225 Difference]: With dead ends: 63 [2020-10-29 09:34:03,401 INFO L226 Difference]: Without dead ends: 43 [2020-10-29 09:34:03,402 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:34:03,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-29 09:34:03,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2020-10-29 09:34:03,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-29 09:34:03,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2020-10-29 09:34:03,409 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 36 [2020-10-29 09:34:03,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:34:03,410 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2020-10-29 09:34:03,410 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 09:34:03,410 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2020-10-29 09:34:03,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-29 09:34:03,411 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:34:03,411 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:34:03,411 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 09:34:03,412 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:34:03,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:34:03,412 INFO L82 PathProgramCache]: Analyzing trace with hash -1598440455, now seen corresponding path program 6 times [2020-10-29 09:34:03,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:34:03,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [724825183] [2020-10-29 09:34:03,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:34:03,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:34:03,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:34:03,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:34:07,146 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:34:07,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-29 09:34:07,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:34:07,147 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3714 [2020-10-29 09:34:07,147 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:34:07,147 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:34:07,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 09:34:07,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-29 09:34:07,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-29 09:34:07,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:34:07,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:34:07,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:34:07,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:34:07,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:34:07,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:34:07,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:34:07,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 09:34:07,269 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:34:07,269 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:34:07,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:34:07,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:34:07,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:34:07,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 09:34:07,278 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-29 09:34:07,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [724825183] [2020-10-29 09:34:07,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:34:07,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 09:34:07,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079855816] [2020-10-29 09:34:07,281 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 09:34:07,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:34:07,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 09:34:07,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:34:07,291 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 10 states. [2020-10-29 09:34:07,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:34:07,478 INFO L93 Difference]: Finished difference Result 69 states and 72 transitions. [2020-10-29 09:34:07,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 09:34:07,478 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2020-10-29 09:34:07,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:34:07,479 INFO L225 Difference]: With dead ends: 69 [2020-10-29 09:34:07,479 INFO L226 Difference]: Without dead ends: 47 [2020-10-29 09:34:07,483 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:34:07,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-29 09:34:07,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2020-10-29 09:34:07,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-29 09:34:07,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-10-29 09:34:07,498 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 40 [2020-10-29 09:34:07,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:34:07,498 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-10-29 09:34:07,499 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 09:34:07,499 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-10-29 09:34:07,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-29 09:34:07,502 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:34:07,503 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:34:07,503 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 09:34:07,503 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:34:07,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:34:07,504 INFO L82 PathProgramCache]: Analyzing trace with hash -2035070851, now seen corresponding path program 7 times [2020-10-29 09:34:07,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:34:07,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [679934265] [2020-10-29 09:34:07,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:34:07,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:34:07,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:34:07,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:34:12,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:34:12,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-29 09:34:12,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:34:12,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-29 09:34:12,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:34:12,538 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:34:12,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 09:34:12,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-29 09:34:12,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-29 09:34:12,538 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:34:12,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:34:12,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:34:12,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:34:12,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:34:12,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:34:12,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:34:12,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:34:12,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:34:12,677 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:34:12,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:34:12,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:34:12,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:34:12,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:34:12,683 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-29 09:34:12,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [679934265] [2020-10-29 09:34:12,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:34:12,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 09:34:12,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888084305] [2020-10-29 09:34:12,684 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 09:34:12,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:34:12,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 09:34:12,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:34:12,686 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 11 states. [2020-10-29 09:34:12,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:34:12,804 INFO L93 Difference]: Finished difference Result 75 states and 78 transitions. [2020-10-29 09:34:12,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 09:34:12,805 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2020-10-29 09:34:12,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:34:12,806 INFO L225 Difference]: With dead ends: 75 [2020-10-29 09:34:12,806 INFO L226 Difference]: Without dead ends: 51 [2020-10-29 09:34:12,806 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:34:12,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-29 09:34:12,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2020-10-29 09:34:12,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-29 09:34:12,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2020-10-29 09:34:12,813 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 44 [2020-10-29 09:34:12,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:34:12,814 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2020-10-29 09:34:12,814 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 09:34:12,814 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2020-10-29 09:34:12,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-29 09:34:12,815 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:34:12,815 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:34:12,816 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 09:34:12,816 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:34:12,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:34:12,816 INFO L82 PathProgramCache]: Analyzing trace with hash -330824959, now seen corresponding path program 8 times [2020-10-29 09:34:12,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:34:12,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [368704761] [2020-10-29 09:34:12,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:34:12,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:34:12,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:34:12,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:34:17,853 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:34:17,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-29 09:34:17,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:34:17,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-29 09:34:17,853 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:34:17,854 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:34:17,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 09:34:17,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:34:17,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-29 09:34:17,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:34:17,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:34:17,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:34:17,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:34:17,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:34:18,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:34:18,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:34:18,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:34:18,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:34:18,001 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:34:18,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:34:18,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:34:18,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:34:18,001 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:34:18,007 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-29 09:34:18,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [368704761] [2020-10-29 09:34:18,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:34:18,009 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 09:34:18,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667157208] [2020-10-29 09:34:18,010 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 09:34:18,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:34:18,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 09:34:18,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:34:18,012 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 12 states. [2020-10-29 09:34:18,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:34:18,157 INFO L93 Difference]: Finished difference Result 81 states and 84 transitions. [2020-10-29 09:34:18,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 09:34:18,158 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 48 [2020-10-29 09:34:18,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:34:18,159 INFO L225 Difference]: With dead ends: 81 [2020-10-29 09:34:18,159 INFO L226 Difference]: Without dead ends: 55 [2020-10-29 09:34:18,159 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:34:18,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-29 09:34:18,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2020-10-29 09:34:18,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-29 09:34:18,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2020-10-29 09:34:18,170 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 48 [2020-10-29 09:34:18,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:34:18,170 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2020-10-29 09:34:18,170 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 09:34:18,171 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2020-10-29 09:34:18,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-29 09:34:18,172 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:34:18,172 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:34:18,172 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 09:34:18,172 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:34:18,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:34:18,173 INFO L82 PathProgramCache]: Analyzing trace with hash 153938821, now seen corresponding path program 9 times [2020-10-29 09:34:18,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:34:18,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [690734880] [2020-10-29 09:34:18,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:34:18,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:34:18,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:34:18,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:34:23,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:34:23,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-29 09:34:23,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:34:23,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-29 09:34:23,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:34:23,214 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:34:23,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-29 09:34:23,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:34:23,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-29 09:34:23,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:34:23,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:34:23,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:34:23,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:34:23,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:34:23,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:34:23,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:34:23,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:34:23,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:34:23,398 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:34:23,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:34:23,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:34:23,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:34:23,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:34:23,406 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-10-29 09:34:23,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [690734880] [2020-10-29 09:34:23,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:34:23,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-29 09:34:23,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886060785] [2020-10-29 09:34:23,408 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-29 09:34:23,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:34:23,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-29 09:34:23,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:34:23,410 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 13 states. [2020-10-29 09:34:23,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:34:23,562 INFO L93 Difference]: Finished difference Result 87 states and 90 transitions. [2020-10-29 09:34:23,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 09:34:23,562 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 52 [2020-10-29 09:34:23,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:34:23,563 INFO L225 Difference]: With dead ends: 87 [2020-10-29 09:34:23,563 INFO L226 Difference]: Without dead ends: 59 [2020-10-29 09:34:23,567 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:34:23,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-29 09:34:23,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 57. [2020-10-29 09:34:23,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-29 09:34:23,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-10-29 09:34:23,576 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 52 [2020-10-29 09:34:23,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:34:23,577 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-10-29 09:34:23,577 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-29 09:34:23,577 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-10-29 09:34:23,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-29 09:34:23,578 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:34:23,578 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:34:23,578 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 09:34:23,578 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:34:23,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:34:23,579 INFO L82 PathProgramCache]: Analyzing trace with hash -476642807, now seen corresponding path program 10 times [2020-10-29 09:34:23,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:34:23,579 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1905916157] [2020-10-29 09:34:23,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:34:23,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:34:23,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:34:23,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:34:28,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:34:28,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-29 09:34:28,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:34:28,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5090 [2020-10-29 09:34:28,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:34:28,696 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:34:28,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 09:34:28,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:34:28,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-29 09:34:28,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:34:28,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:34:28,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:34:28,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:34:28,903 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:34:28,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:34:28,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:34:28,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:34:28,904 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:34:28,905 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:34:28,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:34:28,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:34:28,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:34:28,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:34:28,914 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-29 09:34:28,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1905916157] [2020-10-29 09:34:28,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:34:28,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 09:34:28,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080016961] [2020-10-29 09:34:28,916 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 09:34:28,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:34:28,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 09:34:28,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:34:28,917 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 14 states. [2020-10-29 09:34:29,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:34:29,086 INFO L93 Difference]: Finished difference Result 93 states and 96 transitions. [2020-10-29 09:34:29,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 09:34:29,087 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 56 [2020-10-29 09:34:29,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:34:29,088 INFO L225 Difference]: With dead ends: 93 [2020-10-29 09:34:29,088 INFO L226 Difference]: Without dead ends: 63 [2020-10-29 09:34:29,089 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-29 09:34:29,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-29 09:34:29,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2020-10-29 09:34:29,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-29 09:34:29,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2020-10-29 09:34:29,102 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 56 [2020-10-29 09:34:29,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:34:29,102 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2020-10-29 09:34:29,102 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 09:34:29,102 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2020-10-29 09:34:29,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-29 09:34:29,105 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:34:29,105 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:34:29,106 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 09:34:29,106 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:34:29,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:34:29,106 INFO L82 PathProgramCache]: Analyzing trace with hash -801421683, now seen corresponding path program 11 times [2020-10-29 09:34:29,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:34:29,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1773475056] [2020-10-29 09:34:29,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:34:29,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:34:29,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:34:29,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:34:34,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:34:34,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-29 09:34:34,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:34:34,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-29 09:34:34,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:34:34,152 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:34:34,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 09:34:34,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-29 09:34:34,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-29 09:34:34,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:34:34,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:34:34,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:34:34,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:34:34,343 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:34:34,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:34:34,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:34:34,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:34:34,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:34:34,344 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:34:34,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:34:34,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:34:34,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:34:34,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:34:34,355 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-10-29 09:34:34,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1773475056] [2020-10-29 09:34:34,355 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:34:34,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-29 09:34:34,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196308337] [2020-10-29 09:34:34,356 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-29 09:34:34,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:34:34,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-29 09:34:34,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:34:34,358 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand 15 states. [2020-10-29 09:34:34,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:34:34,521 INFO L93 Difference]: Finished difference Result 99 states and 102 transitions. [2020-10-29 09:34:34,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 09:34:34,522 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 60 [2020-10-29 09:34:34,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:34:34,523 INFO L225 Difference]: With dead ends: 99 [2020-10-29 09:34:34,523 INFO L226 Difference]: Without dead ends: 67 [2020-10-29 09:34:34,524 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:34:34,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-29 09:34:34,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2020-10-29 09:34:34,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-29 09:34:34,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2020-10-29 09:34:34,531 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 60 [2020-10-29 09:34:34,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:34:34,531 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2020-10-29 09:34:34,531 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-29 09:34:34,531 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2020-10-29 09:34:34,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-29 09:34:34,532 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:34:34,533 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:34:34,533 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 09:34:34,533 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:34:34,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:34:34,533 INFO L82 PathProgramCache]: Analyzing trace with hash -229721839, now seen corresponding path program 12 times [2020-10-29 09:34:34,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:34:34,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2120816474] [2020-10-29 09:34:34,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:34:34,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:34:34,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:34:34,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:34:39,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:34:39,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-29 09:34:39,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:34:39,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-10-29 09:34:39,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:34:39,591 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:34:39,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 09:34:39,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-29 09:34:39,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-29 09:34:39,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:34:39,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:34:39,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:34:39,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:34:39,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:34:39,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:34:39,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:34:39,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:34:39,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:34:39,870 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:34:39,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:34:39,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:34:39,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:34:39,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:34:39,884 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-10-29 09:34:39,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2120816474] [2020-10-29 09:34:39,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:34:39,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 09:34:39,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594564651] [2020-10-29 09:34:39,886 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 09:34:39,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:34:39,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 09:34:39,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-29 09:34:39,888 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 16 states. [2020-10-29 09:34:40,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:34:40,197 INFO L93 Difference]: Finished difference Result 105 states and 108 transitions. [2020-10-29 09:34:40,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 09:34:40,198 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 64 [2020-10-29 09:34:40,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:34:40,199 INFO L225 Difference]: With dead ends: 105 [2020-10-29 09:34:40,199 INFO L226 Difference]: Without dead ends: 71 [2020-10-29 09:34:40,200 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-29 09:34:40,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-29 09:34:40,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 69. [2020-10-29 09:34:40,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-29 09:34:40,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2020-10-29 09:34:40,206 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 64 [2020-10-29 09:34:40,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:34:40,207 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2020-10-29 09:34:40,207 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 09:34:40,207 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2020-10-29 09:34:40,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-29 09:34:40,208 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:34:40,208 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:34:40,208 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-29 09:34:40,209 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:34:40,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:34:40,209 INFO L82 PathProgramCache]: Analyzing trace with hash -1148823147, now seen corresponding path program 13 times [2020-10-29 09:34:40,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:34:40,210 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2096671143] [2020-10-29 09:34:40,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:34:40,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:34:40,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:34:40,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:34:45,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:34:45,287 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-29 09:34:45,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:34:45,287 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5045 [2020-10-29 09:34:45,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:34:45,288 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:34:45,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-29 09:34:45,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-29 09:34:45,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-29 09:34:45,288 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:34:45,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:34:45,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:34:45,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:34:45,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:34:45,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:34:45,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:34:45,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:34:45,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:34:45,565 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:34:45,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:34:45,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:34:45,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:34:45,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:34:45,580 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2020-10-29 09:34:45,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2096671143] [2020-10-29 09:34:45,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:34:45,581 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-29 09:34:45,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156015984] [2020-10-29 09:34:45,583 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-29 09:34:45,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:34:45,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-29 09:34:45,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:34:45,585 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 17 states. [2020-10-29 09:34:45,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:34:45,896 INFO L93 Difference]: Finished difference Result 111 states and 114 transitions. [2020-10-29 09:34:45,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 09:34:45,897 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 68 [2020-10-29 09:34:45,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:34:45,899 INFO L225 Difference]: With dead ends: 111 [2020-10-29 09:34:45,899 INFO L226 Difference]: Without dead ends: 75 [2020-10-29 09:34:45,900 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:34:45,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-29 09:34:45,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2020-10-29 09:34:45,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-29 09:34:45,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2020-10-29 09:34:45,922 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 68 [2020-10-29 09:34:45,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:34:45,922 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2020-10-29 09:34:45,923 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-29 09:34:45,923 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2020-10-29 09:34:45,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-29 09:34:45,925 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:34:45,925 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:34:45,925 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-29 09:34:45,926 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:34:45,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:34:45,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1813456921, now seen corresponding path program 14 times [2020-10-29 09:34:45,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:34:45,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [570662200] [2020-10-29 09:34:45,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:34:45,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:34:45,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:34:46,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:34:50,979 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:34:50,980 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-29 09:34:50,980 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:34:50,980 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-29 09:34:50,980 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:34:50,980 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:34:50,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-29 09:34:50,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-29 09:34:50,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-29 09:34:50,981 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:34:51,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:34:51,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:34:51,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:34:51,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:34:51,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:34:51,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:34:51,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:34:51,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:34:51,276 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:34:51,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:34:51,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:34:51,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:34:51,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:34:51,291 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2020-10-29 09:34:51,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [570662200] [2020-10-29 09:34:51,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:34:51,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-29 09:34:51,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202220399] [2020-10-29 09:34:51,293 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-29 09:34:51,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:34:51,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-29 09:34:51,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-29 09:34:51,294 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand 18 states. [2020-10-29 09:34:51,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:34:51,643 INFO L93 Difference]: Finished difference Result 117 states and 120 transitions. [2020-10-29 09:34:51,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-29 09:34:51,644 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 72 [2020-10-29 09:34:51,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:34:51,645 INFO L225 Difference]: With dead ends: 117 [2020-10-29 09:34:51,645 INFO L226 Difference]: Without dead ends: 79 [2020-10-29 09:34:51,646 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-29 09:34:51,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-29 09:34:51,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 77. [2020-10-29 09:34:51,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-29 09:34:51,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2020-10-29 09:34:51,653 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 72 [2020-10-29 09:34:51,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:34:51,654 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2020-10-29 09:34:51,654 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-29 09:34:51,654 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2020-10-29 09:34:51,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-29 09:34:51,655 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:34:51,655 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:34:51,655 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-29 09:34:51,655 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:34:51,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:34:51,656 INFO L82 PathProgramCache]: Analyzing trace with hash -1833556835, now seen corresponding path program 15 times [2020-10-29 09:34:51,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:34:51,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [255248246] [2020-10-29 09:34:51,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:34:51,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:34:51,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:34:51,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:34:56,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:34:56,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-29 09:34:56,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:34:56,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-29 09:34:56,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:34:56,700 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:34:56,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-29 09:34:56,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:34:56,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-29 09:34:56,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:34:56,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:34:56,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:34:56,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:34:56,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:34:56,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:34:56,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:34:56,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:34:56,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:34:56,967 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:34:56,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:34:56,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:34:56,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:34:56,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:34:56,978 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2020-10-29 09:34:56,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [255248246] [2020-10-29 09:34:56,978 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:34:56,978 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-29 09:34:56,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215827839] [2020-10-29 09:34:56,979 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-29 09:34:56,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:34:56,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-29 09:34:56,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-29 09:34:56,980 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand 19 states. [2020-10-29 09:34:57,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:34:57,232 INFO L93 Difference]: Finished difference Result 123 states and 126 transitions. [2020-10-29 09:34:57,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-29 09:34:57,233 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 76 [2020-10-29 09:34:57,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:34:57,234 INFO L225 Difference]: With dead ends: 123 [2020-10-29 09:34:57,234 INFO L226 Difference]: Without dead ends: 83 [2020-10-29 09:34:57,234 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-29 09:34:57,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-29 09:34:57,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 81. [2020-10-29 09:34:57,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-29 09:34:57,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2020-10-29 09:34:57,240 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 76 [2020-10-29 09:34:57,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:34:57,240 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2020-10-29 09:34:57,240 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-29 09:34:57,240 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2020-10-29 09:34:57,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-29 09:34:57,241 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:34:57,241 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:34:57,241 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-29 09:34:57,241 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:34:57,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:34:57,242 INFO L82 PathProgramCache]: Analyzing trace with hash -1936175327, now seen corresponding path program 16 times [2020-10-29 09:34:57,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:34:57,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1508690775] [2020-10-29 09:34:57,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:34:57,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:34:57,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:34:57,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:35:02,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:35:02,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-29 09:35:02,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:35:02,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5051 [2020-10-29 09:35:02,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:35:02,320 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:35:02,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-29 09:35:02,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-29 09:35:02,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-29 09:35:02,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:35:02,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:35:02,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:35:02,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:35:02,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:35:02,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:35:02,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:35:02,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:35:02,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:35:02,668 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:35:02,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:35:02,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:35:02,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:35:02,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:35:02,679 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2020-10-29 09:35:02,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1508690775] [2020-10-29 09:35:02,680 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:35:02,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-29 09:35:02,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413423628] [2020-10-29 09:35:02,681 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-29 09:35:02,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:35:02,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-29 09:35:02,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-29 09:35:02,682 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 20 states. [2020-10-29 09:35:02,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:35:02,962 INFO L93 Difference]: Finished difference Result 129 states and 132 transitions. [2020-10-29 09:35:02,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-29 09:35:02,963 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 80 [2020-10-29 09:35:02,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:35:02,964 INFO L225 Difference]: With dead ends: 129 [2020-10-29 09:35:02,964 INFO L226 Difference]: Without dead ends: 87 [2020-10-29 09:35:02,966 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-29 09:35:02,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-29 09:35:02,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 85. [2020-10-29 09:35:02,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-29 09:35:02,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2020-10-29 09:35:02,974 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 80 [2020-10-29 09:35:02,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:35:02,974 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2020-10-29 09:35:02,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-29 09:35:02,975 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2020-10-29 09:35:02,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-29 09:35:02,976 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:35:02,976 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:35:02,976 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-29 09:35:02,976 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:35:02,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:35:02,977 INFO L82 PathProgramCache]: Analyzing trace with hash 91400101, now seen corresponding path program 17 times [2020-10-29 09:35:02,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:35:02,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [696105604] [2020-10-29 09:35:02,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:35:03,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:35:03,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:35:03,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:35:08,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:35:08,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-29 09:35:08,041 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:35:08,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5032 [2020-10-29 09:35:08,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:35:08,041 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:35:08,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-29 09:35:08,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:35:08,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-29 09:35:08,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:35:08,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:35:08,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:35:08,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:35:08,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:35:08,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:35:08,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:35:08,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:35:08,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:35:08,398 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:35:08,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:35:08,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:35:08,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:35:08,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:35:08,409 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2020-10-29 09:35:08,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [696105604] [2020-10-29 09:35:08,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:35:08,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-29 09:35:08,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951362008] [2020-10-29 09:35:08,410 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-29 09:35:08,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:35:08,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-29 09:35:08,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-29 09:35:08,411 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand 21 states. [2020-10-29 09:35:08,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:35:08,725 INFO L93 Difference]: Finished difference Result 135 states and 138 transitions. [2020-10-29 09:35:08,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-29 09:35:08,725 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 84 [2020-10-29 09:35:08,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:35:08,726 INFO L225 Difference]: With dead ends: 135 [2020-10-29 09:35:08,726 INFO L226 Difference]: Without dead ends: 91 [2020-10-29 09:35:08,727 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-29 09:35:08,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-29 09:35:08,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 89. [2020-10-29 09:35:08,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-29 09:35:08,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2020-10-29 09:35:08,734 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 84 [2020-10-29 09:35:08,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:35:08,735 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2020-10-29 09:35:08,735 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-29 09:35:08,735 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2020-10-29 09:35:08,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-29 09:35:08,736 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:35:08,736 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:35:08,736 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-29 09:35:08,736 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:35:08,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:35:08,737 INFO L82 PathProgramCache]: Analyzing trace with hash 2004495913, now seen corresponding path program 18 times [2020-10-29 09:35:08,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:35:08,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1222682889] [2020-10-29 09:35:08,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:35:08,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:35:08,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:35:08,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:35:13,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:35:13,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-29 09:35:13,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:35:13,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-29 09:35:13,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:35:13,792 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:35:13,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-29 09:35:13,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:35:13,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-29 09:35:13,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:35:14,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:35:14,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:35:14,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:35:14,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:35:14,234 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:35:14,234 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:35:14,234 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-29 09:35:14,234 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:35:14,234 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:35:14,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:35:14,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:35:14,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:35:14,235 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:35:14,248 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2020-10-29 09:35:14,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1222682889] [2020-10-29 09:35:14,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:35:14,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-29 09:35:14,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716647018] [2020-10-29 09:35:14,249 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-29 09:35:14,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:35:14,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-29 09:35:14,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-29 09:35:14,251 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand 22 states. [2020-10-29 09:35:14,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:35:14,567 INFO L93 Difference]: Finished difference Result 141 states and 144 transitions. [2020-10-29 09:35:14,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-29 09:35:14,568 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 88 [2020-10-29 09:35:14,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:35:14,570 INFO L225 Difference]: With dead ends: 141 [2020-10-29 09:35:14,570 INFO L226 Difference]: Without dead ends: 95 [2020-10-29 09:35:14,571 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-29 09:35:14,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-29 09:35:14,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 93. [2020-10-29 09:35:14,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-29 09:35:14,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2020-10-29 09:35:14,577 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 88 [2020-10-29 09:35:14,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:35:14,578 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2020-10-29 09:35:14,578 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-29 09:35:14,578 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2020-10-29 09:35:14,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-29 09:35:14,579 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:35:14,579 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:35:14,579 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-29 09:35:14,579 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:35:14,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:35:14,580 INFO L82 PathProgramCache]: Analyzing trace with hash -1419517267, now seen corresponding path program 19 times [2020-10-29 09:35:14,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:35:14,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1953673172] [2020-10-29 09:35:14,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:35:14,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:35:14,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:35:14,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:35:19,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:35:19,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-29 09:35:19,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:35:19,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5071 [2020-10-29 09:35:19,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:35:19,683 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:35:19,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-29 09:35:19,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:35:19,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-29 09:35:19,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:35:20,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:35:20,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:35:20,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:35:20,091 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:35:20,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:35:20,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:35:20,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:35:20,092 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:35:20,092 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:35:20,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:35:20,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:35:20,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:35:20,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:35:20,103 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2020-10-29 09:35:20,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1953673172] [2020-10-29 09:35:20,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:35:20,103 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-29 09:35:20,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019614095] [2020-10-29 09:35:20,104 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-29 09:35:20,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:35:20,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-29 09:35:20,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-29 09:35:20,106 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand 23 states. [2020-10-29 09:35:20,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:35:20,425 INFO L93 Difference]: Finished difference Result 147 states and 150 transitions. [2020-10-29 09:35:20,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-29 09:35:20,426 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 92 [2020-10-29 09:35:20,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:35:20,427 INFO L225 Difference]: With dead ends: 147 [2020-10-29 09:35:20,427 INFO L226 Difference]: Without dead ends: 99 [2020-10-29 09:35:20,429 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-29 09:35:20,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-29 09:35:20,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 97. [2020-10-29 09:35:20,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-29 09:35:20,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2020-10-29 09:35:20,436 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 92 [2020-10-29 09:35:20,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:35:20,436 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2020-10-29 09:35:20,436 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-29 09:35:20,436 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2020-10-29 09:35:20,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-29 09:35:20,444 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:35:20,444 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:35:20,444 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-29 09:35:20,444 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:35:20,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:35:20,445 INFO L82 PathProgramCache]: Analyzing trace with hash 946128177, now seen corresponding path program 20 times [2020-10-29 09:35:20,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:35:20,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1173943941] [2020-10-29 09:35:20,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:35:20,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:35:20,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:35:20,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:35:25,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:35:25,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-29 09:35:25,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:35:25,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-29 09:35:25,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:35:25,495 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:35:25,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-29 09:35:25,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-29 09:35:25,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-29 09:35:25,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:35:25,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:35:25,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:35:25,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:35:25,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:35:25,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:35:25,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:35:25,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:35:25,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:35:25,897 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:35:25,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:35:25,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:35:25,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:35:25,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:35:25,909 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2020-10-29 09:35:25,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1173943941] [2020-10-29 09:35:25,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:35:25,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-29 09:35:25,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450279101] [2020-10-29 09:35:25,913 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-29 09:35:25,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:35:25,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-29 09:35:25,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-29 09:35:25,915 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand 24 states. [2020-10-29 09:35:26,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:35:26,169 INFO L93 Difference]: Finished difference Result 153 states and 156 transitions. [2020-10-29 09:35:26,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-29 09:35:26,174 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 96 [2020-10-29 09:35:26,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:35:26,175 INFO L225 Difference]: With dead ends: 153 [2020-10-29 09:35:26,175 INFO L226 Difference]: Without dead ends: 103 [2020-10-29 09:35:26,176 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-29 09:35:26,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-29 09:35:26,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 101. [2020-10-29 09:35:26,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-29 09:35:26,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2020-10-29 09:35:26,189 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 96 [2020-10-29 09:35:26,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:35:26,191 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2020-10-29 09:35:26,192 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-29 09:35:26,192 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2020-10-29 09:35:26,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-29 09:35:26,193 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:35:26,193 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:35:26,193 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-29 09:35:26,193 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:35:26,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:35:26,194 INFO L82 PathProgramCache]: Analyzing trace with hash 70374837, now seen corresponding path program 21 times [2020-10-29 09:35:26,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:35:26,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [339643563] [2020-10-29 09:35:26,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:35:26,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:35:26,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:35:26,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:35:31,302 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:35:31,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-29 09:35:31,303 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:35:31,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5075 [2020-10-29 09:35:31,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:35:31,303 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:35:31,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-29 09:35:31,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-10-29 09:35:31,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-29 09:35:31,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:35:31,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:35:31,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:35:31,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:35:31,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:35:31,786 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:35:31,786 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:35:31,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:35:31,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:35:31,787 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:35:31,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:35:31,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:35:31,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:35:31,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:35:31,799 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2020-10-29 09:35:31,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [339643563] [2020-10-29 09:35:31,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:35:31,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-29 09:35:31,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77605302] [2020-10-29 09:35:31,801 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-29 09:35:31,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:35:31,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-29 09:35:31,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-29 09:35:31,803 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand 25 states. [2020-10-29 09:35:32,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:35:32,159 INFO L93 Difference]: Finished difference Result 159 states and 162 transitions. [2020-10-29 09:35:32,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-29 09:35:32,160 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 100 [2020-10-29 09:35:32,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:35:32,162 INFO L225 Difference]: With dead ends: 159 [2020-10-29 09:35:32,162 INFO L226 Difference]: Without dead ends: 107 [2020-10-29 09:35:32,163 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-29 09:35:32,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-29 09:35:32,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 105. [2020-10-29 09:35:32,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-29 09:35:32,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2020-10-29 09:35:32,169 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 100 [2020-10-29 09:35:32,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:35:32,170 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2020-10-29 09:35:32,170 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-29 09:35:32,170 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2020-10-29 09:35:32,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-29 09:35:32,171 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:35:32,171 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:35:32,171 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-29 09:35:32,172 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:35:32,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:35:32,172 INFO L82 PathProgramCache]: Analyzing trace with hash -1023404999, now seen corresponding path program 22 times [2020-10-29 09:35:32,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:35:32,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1957654119] [2020-10-29 09:35:32,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:35:32,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:35:32,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:35:32,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:35:37,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:35:37,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-29 09:35:37,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:35:37,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5123 [2020-10-29 09:35:37,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:35:37,330 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:35:37,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-29 09:35:37,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:35:37,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-29 09:35:37,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:35:37,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:35:37,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:35:37,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:35:37,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:35:37,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:35:37,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:35:37,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:35:37,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:35:37,812 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:35:37,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:35:37,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:35:37,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:35:37,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:35:37,823 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2020-10-29 09:35:37,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1957654119] [2020-10-29 09:35:37,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:35:37,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-29 09:35:37,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920637259] [2020-10-29 09:35:37,825 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-29 09:35:37,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:35:37,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-29 09:35:37,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-29 09:35:37,826 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand 26 states. [2020-10-29 09:35:38,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:35:38,158 INFO L93 Difference]: Finished difference Result 165 states and 168 transitions. [2020-10-29 09:35:38,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-29 09:35:38,159 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 104 [2020-10-29 09:35:38,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:35:38,161 INFO L225 Difference]: With dead ends: 165 [2020-10-29 09:35:38,161 INFO L226 Difference]: Without dead ends: 111 [2020-10-29 09:35:38,162 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-29 09:35:38,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-29 09:35:38,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 109. [2020-10-29 09:35:38,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-29 09:35:38,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2020-10-29 09:35:38,169 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 104 [2020-10-29 09:35:38,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:35:38,169 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2020-10-29 09:35:38,169 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-29 09:35:38,169 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2020-10-29 09:35:38,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-29 09:35:38,170 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:35:38,170 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:35:38,171 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-29 09:35:38,171 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:35:38,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:35:38,172 INFO L82 PathProgramCache]: Analyzing trace with hash 2005172413, now seen corresponding path program 23 times [2020-10-29 09:35:38,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:35:38,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2090005151] [2020-10-29 09:35:38,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:35:38,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:35:38,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:35:38,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:35:43,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:35:43,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-29 09:35:43,285 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:35:43,285 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5076 [2020-10-29 09:35:43,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:35:43,285 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:35:43,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-29 09:35:43,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 59 [2020-10-29 09:35:43,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-29 09:35:43,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:35:43,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:35:43,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:35:43,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:35:43,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:35:43,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:35:43,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:35:43,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:35:43,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:35:43,826 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:35:43,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:35:43,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:35:43,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:35:43,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:35:43,839 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2020-10-29 09:35:43,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2090005151] [2020-10-29 09:35:43,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:35:43,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-29 09:35:43,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664160499] [2020-10-29 09:35:43,841 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-29 09:35:43,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:35:43,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-29 09:35:43,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-29 09:35:43,842 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand 27 states. [2020-10-29 09:35:44,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:35:44,135 INFO L93 Difference]: Finished difference Result 171 states and 174 transitions. [2020-10-29 09:35:44,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-29 09:35:44,135 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 108 [2020-10-29 09:35:44,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:35:44,137 INFO L225 Difference]: With dead ends: 171 [2020-10-29 09:35:44,137 INFO L226 Difference]: Without dead ends: 115 [2020-10-29 09:35:44,138 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-29 09:35:44,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-29 09:35:44,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 113. [2020-10-29 09:35:44,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-29 09:35:44,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 114 transitions. [2020-10-29 09:35:44,145 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 114 transitions. Word has length 108 [2020-10-29 09:35:44,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:35:44,145 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 114 transitions. [2020-10-29 09:35:44,145 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-29 09:35:44,145 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 114 transitions. [2020-10-29 09:35:44,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-29 09:35:44,146 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:35:44,147 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:35:44,147 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-29 09:35:44,147 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:35:44,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:35:44,147 INFO L82 PathProgramCache]: Analyzing trace with hash -218883263, now seen corresponding path program 24 times [2020-10-29 09:35:44,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:35:44,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1227504600] [2020-10-29 09:35:44,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:35:44,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:35:44,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:35:47,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:35:49,276 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:35:49,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-29 09:35:49,277 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:35:49,277 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5096 [2020-10-29 09:35:49,277 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:35:49,277 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:35:49,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-29 09:35:49,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-10-29 09:35:49,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-29 09:35:49,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:35:49,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:35:49,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:35:49,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:35:49,889 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:35:49,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:35:49,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:35:49,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:35:49,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:35:49,890 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:35:49,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:35:49,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:35:49,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:35:49,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:35:49,907 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2020-10-29 09:35:49,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1227504600] [2020-10-29 09:35:49,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:35:49,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-29 09:35:49,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385808421] [2020-10-29 09:35:49,909 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-29 09:35:49,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:35:49,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-29 09:35:49,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-29 09:35:49,911 INFO L87 Difference]: Start difference. First operand 113 states and 114 transitions. Second operand 28 states. [2020-10-29 09:35:50,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:35:50,275 INFO L93 Difference]: Finished difference Result 177 states and 180 transitions. [2020-10-29 09:35:50,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-29 09:35:50,276 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 112 [2020-10-29 09:35:50,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:35:50,277 INFO L225 Difference]: With dead ends: 177 [2020-10-29 09:35:50,277 INFO L226 Difference]: Without dead ends: 119 [2020-10-29 09:35:50,278 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-29 09:35:50,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-29 09:35:50,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 117. [2020-10-29 09:35:50,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-29 09:35:50,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2020-10-29 09:35:50,283 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 112 [2020-10-29 09:35:50,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:35:50,284 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2020-10-29 09:35:50,284 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-29 09:35:50,284 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2020-10-29 09:35:50,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-29 09:35:50,285 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:35:50,285 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:35:50,285 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-29 09:35:50,286 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:35:50,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:35:50,286 INFO L82 PathProgramCache]: Analyzing trace with hash 1426318277, now seen corresponding path program 25 times [2020-10-29 09:35:50,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:35:50,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1875904721] [2020-10-29 09:35:50,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:35:50,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:35:50,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:35:50,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:35:55,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:35:55,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-10-29 09:35:55,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:35:55,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5039 [2020-10-29 09:35:55,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:35:55,369 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:35:55,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-29 09:35:55,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:35:55,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-29 09:35:55,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:35:55,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:35:55,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:35:55,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:35:55,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:35:55,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:35:55,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:35:55,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:35:55,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:35:55,975 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:35:55,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:35:55,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:35:55,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:35:55,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:35:55,995 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2020-10-29 09:35:55,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1875904721] [2020-10-29 09:35:55,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:35:55,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-29 09:35:55,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553274723] [2020-10-29 09:35:55,996 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-29 09:35:55,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:35:55,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-29 09:35:55,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-29 09:35:55,999 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand 29 states. [2020-10-29 09:35:56,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:35:56,429 INFO L93 Difference]: Finished difference Result 183 states and 186 transitions. [2020-10-29 09:35:56,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-29 09:35:56,430 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 116 [2020-10-29 09:35:56,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:35:56,431 INFO L225 Difference]: With dead ends: 183 [2020-10-29 09:35:56,432 INFO L226 Difference]: Without dead ends: 123 [2020-10-29 09:35:56,433 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-29 09:35:56,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-29 09:35:56,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 121. [2020-10-29 09:35:56,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-29 09:35:56,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 122 transitions. [2020-10-29 09:35:56,440 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 122 transitions. Word has length 116 [2020-10-29 09:35:56,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:35:56,440 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 122 transitions. [2020-10-29 09:35:56,440 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-29 09:35:56,440 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 122 transitions. [2020-10-29 09:35:56,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-10-29 09:35:56,442 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:35:56,442 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:35:56,442 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-29 09:35:56,442 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:35:56,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:35:56,443 INFO L82 PathProgramCache]: Analyzing trace with hash -1947674039, now seen corresponding path program 26 times [2020-10-29 09:35:56,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:35:56,443 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [318509954] [2020-10-29 09:35:56,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:35:56,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:35:56,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:35:56,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:01,533 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:36:01,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-29 09:36:01,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:36:01,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5051 [2020-10-29 09:36:01,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:36:01,533 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:36:01,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-29 09:36:01,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:36:01,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-29 09:36:01,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:36:02,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:36:02,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:36:02,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:02,173 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:36:02,173 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:36:02,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:36:02,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:36:02,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:36:02,174 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:36:02,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:36:02,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:36:02,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:36:02,174 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:36:02,190 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2020-10-29 09:36:02,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [318509954] [2020-10-29 09:36:02,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:36:02,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-29 09:36:02,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327351786] [2020-10-29 09:36:02,192 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-29 09:36:02,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:36:02,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-29 09:36:02,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-29 09:36:02,193 INFO L87 Difference]: Start difference. First operand 121 states and 122 transitions. Second operand 30 states. [2020-10-29 09:36:02,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:36:02,614 INFO L93 Difference]: Finished difference Result 189 states and 192 transitions. [2020-10-29 09:36:02,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-29 09:36:02,614 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 120 [2020-10-29 09:36:02,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:36:02,616 INFO L225 Difference]: With dead ends: 189 [2020-10-29 09:36:02,616 INFO L226 Difference]: Without dead ends: 127 [2020-10-29 09:36:02,617 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-29 09:36:02,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-29 09:36:02,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 125. [2020-10-29 09:36:02,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-29 09:36:02,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 126 transitions. [2020-10-29 09:36:02,624 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 126 transitions. Word has length 120 [2020-10-29 09:36:02,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:36:02,624 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 126 transitions. [2020-10-29 09:36:02,624 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-29 09:36:02,624 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 126 transitions. [2020-10-29 09:36:02,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-10-29 09:36:02,625 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:36:02,625 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:36:02,626 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-29 09:36:02,626 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:36:02,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:36:02,626 INFO L82 PathProgramCache]: Analyzing trace with hash -732430643, now seen corresponding path program 27 times [2020-10-29 09:36:02,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:36:02,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1980921797] [2020-10-29 09:36:02,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:36:02,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:36:02,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:07,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:36:07,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-29 09:36:07,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:36:07,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5093 [2020-10-29 09:36:07,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:36:07,758 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:36:07,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-29 09:36:07,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:36:07,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-29 09:36:07,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:36:08,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:36:08,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:36:08,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:08,438 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:36:08,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:36:08,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:36:08,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:36:08,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:36:08,439 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:36:08,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:36:08,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:36:08,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:36:08,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:36:08,451 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2020-10-29 09:36:08,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1980921797] [2020-10-29 09:36:08,452 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:36:08,452 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-29 09:36:08,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763367447] [2020-10-29 09:36:08,452 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-29 09:36:08,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:36:08,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-29 09:36:08,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-29 09:36:08,453 INFO L87 Difference]: Start difference. First operand 125 states and 126 transitions. Second operand 31 states. [2020-10-29 09:36:08,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:36:08,854 INFO L93 Difference]: Finished difference Result 195 states and 198 transitions. [2020-10-29 09:36:08,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-29 09:36:08,855 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 124 [2020-10-29 09:36:08,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:36:08,856 INFO L225 Difference]: With dead ends: 195 [2020-10-29 09:36:08,857 INFO L226 Difference]: Without dead ends: 131 [2020-10-29 09:36:08,858 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-29 09:36:08,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-29 09:36:08,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 129. [2020-10-29 09:36:08,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-29 09:36:08,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 130 transitions. [2020-10-29 09:36:08,865 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 130 transitions. Word has length 124 [2020-10-29 09:36:08,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:36:08,866 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 130 transitions. [2020-10-29 09:36:08,866 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-29 09:36:08,866 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 130 transitions. [2020-10-29 09:36:08,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-10-29 09:36:08,867 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:36:08,867 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:36:08,867 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-29 09:36:08,867 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:36:08,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:36:08,868 INFO L82 PathProgramCache]: Analyzing trace with hash 965103953, now seen corresponding path program 28 times [2020-10-29 09:36:08,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:36:08,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1154752086] [2020-10-29 09:36:08,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:36:08,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:36:08,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:13,961 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:36:13,962 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 138 [2020-10-29 09:36:13,962 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:36:13,962 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5035 [2020-10-29 09:36:13,962 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:36:13,962 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:36:13,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-29 09:36:13,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:36:13,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-29 09:36:13,962 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:36:14,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:36:14,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:36:14,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:14,680 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:36:14,680 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:36:14,680 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:36:14,680 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:36:14,680 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:36:14,680 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:36:14,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:36:14,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:36:14,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:36:14,681 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:36:14,694 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2020-10-29 09:36:14,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1154752086] [2020-10-29 09:36:14,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:36:14,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-29 09:36:14,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285352797] [2020-10-29 09:36:14,695 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-29 09:36:14,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:36:14,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-29 09:36:14,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-29 09:36:14,697 INFO L87 Difference]: Start difference. First operand 129 states and 130 transitions. Second operand 32 states. [2020-10-29 09:36:15,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:36:15,151 INFO L93 Difference]: Finished difference Result 201 states and 204 transitions. [2020-10-29 09:36:15,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-29 09:36:15,151 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 128 [2020-10-29 09:36:15,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:36:15,153 INFO L225 Difference]: With dead ends: 201 [2020-10-29 09:36:15,153 INFO L226 Difference]: Without dead ends: 135 [2020-10-29 09:36:15,154 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-29 09:36:15,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-29 09:36:15,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 133. [2020-10-29 09:36:15,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-29 09:36:15,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 134 transitions. [2020-10-29 09:36:15,171 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 134 transitions. Word has length 128 [2020-10-29 09:36:15,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:36:15,172 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 134 transitions. [2020-10-29 09:36:15,172 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-29 09:36:15,172 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 134 transitions. [2020-10-29 09:36:15,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-10-29 09:36:15,173 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:36:15,173 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:36:15,174 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-29 09:36:15,174 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:36:15,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:36:15,174 INFO L82 PathProgramCache]: Analyzing trace with hash 354996693, now seen corresponding path program 29 times [2020-10-29 09:36:15,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:36:15,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1467571554] [2020-10-29 09:36:15,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:36:15,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:36:15,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:20,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:36:20,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 142 [2020-10-29 09:36:20,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:36:20,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5116 [2020-10-29 09:36:20,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:36:20,333 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:36:20,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-29 09:36:20,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:36:20,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-29 09:36:20,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:36:21,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:36:21,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:36:21,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:21,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:36:21,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:36:21,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:36:21,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:36:21,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:36:21,176 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:36:21,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:36:21,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:36:21,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:36:21,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:36:21,189 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2020-10-29 09:36:21,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1467571554] [2020-10-29 09:36:21,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:36:21,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-29 09:36:21,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546774035] [2020-10-29 09:36:21,190 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-29 09:36:21,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:36:21,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-29 09:36:21,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-29 09:36:21,191 INFO L87 Difference]: Start difference. First operand 133 states and 134 transitions. Second operand 33 states. [2020-10-29 09:36:21,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:36:21,666 INFO L93 Difference]: Finished difference Result 207 states and 210 transitions. [2020-10-29 09:36:21,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-29 09:36:21,668 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 132 [2020-10-29 09:36:21,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:36:21,670 INFO L225 Difference]: With dead ends: 207 [2020-10-29 09:36:21,670 INFO L226 Difference]: Without dead ends: 139 [2020-10-29 09:36:21,671 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-29 09:36:21,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-29 09:36:21,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 137. [2020-10-29 09:36:21,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-29 09:36:21,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 138 transitions. [2020-10-29 09:36:21,679 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 138 transitions. Word has length 132 [2020-10-29 09:36:21,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:36:21,679 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 138 transitions. [2020-10-29 09:36:21,679 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-29 09:36:21,680 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 138 transitions. [2020-10-29 09:36:21,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-10-29 09:36:21,680 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:36:21,681 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:36:21,681 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-29 09:36:21,681 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:36:21,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:36:21,681 INFO L82 PathProgramCache]: Analyzing trace with hash -1888190375, now seen corresponding path program 30 times [2020-10-29 09:36:21,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:36:21,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [227102126] [2020-10-29 09:36:21,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:36:21,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:36:21,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:27,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:36:27,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 146 [2020-10-29 09:36:27,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:36:27,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5310 [2020-10-29 09:36:27,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:36:27,033 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:36:27,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-29 09:36:27,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:36:27,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-29 09:36:27,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:36:27,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:36:27,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:36:27,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:27,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:36:27,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:36:27,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:36:27,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:36:27,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:36:27,852 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:36:27,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:36:27,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:36:27,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:36:27,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:36:27,868 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2020-10-29 09:36:27,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [227102126] [2020-10-29 09:36:27,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:36:27,868 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-29 09:36:27,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395493281] [2020-10-29 09:36:27,869 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-29 09:36:27,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:36:27,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-29 09:36:27,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-29 09:36:27,870 INFO L87 Difference]: Start difference. First operand 137 states and 138 transitions. Second operand 34 states. [2020-10-29 09:36:28,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:36:28,345 INFO L93 Difference]: Finished difference Result 213 states and 216 transitions. [2020-10-29 09:36:28,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-29 09:36:28,345 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 136 [2020-10-29 09:36:28,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:36:28,348 INFO L225 Difference]: With dead ends: 213 [2020-10-29 09:36:28,348 INFO L226 Difference]: Without dead ends: 143 [2020-10-29 09:36:28,349 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-29 09:36:28,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-29 09:36:28,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 141. [2020-10-29 09:36:28,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-29 09:36:28,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 142 transitions. [2020-10-29 09:36:28,361 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 142 transitions. Word has length 136 [2020-10-29 09:36:28,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:36:28,361 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 142 transitions. [2020-10-29 09:36:28,362 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-29 09:36:28,363 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 142 transitions. [2020-10-29 09:36:28,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-10-29 09:36:28,365 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:36:28,365 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:36:28,365 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-29 09:36:28,365 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:36:28,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:36:28,366 INFO L82 PathProgramCache]: Analyzing trace with hash 522083549, now seen corresponding path program 31 times [2020-10-29 09:36:28,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:36:28,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1655546184] [2020-10-29 09:36:28,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:36:28,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:36:28,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:33,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:36:33,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 150 [2020-10-29 09:36:33,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:36:33,485 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5071 [2020-10-29 09:36:33,485 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:36:33,485 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:36:33,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-29 09:36:33,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:36:33,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-29 09:36:33,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:36:34,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:36:34,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:36:34,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:34,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:36:34,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:36:34,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:36:34,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:36:34,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:36:34,367 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:36:34,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:36:34,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:36:34,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:36:34,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:36:34,388 INFO L134 CoverageAnalysis]: Checked inductivity of 1922 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 961 trivial. 0 not checked. [2020-10-29 09:36:34,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1655546184] [2020-10-29 09:36:34,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:36:34,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-29 09:36:34,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743043572] [2020-10-29 09:36:34,389 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-29 09:36:34,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:36:34,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-29 09:36:34,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-29 09:36:34,391 INFO L87 Difference]: Start difference. First operand 141 states and 142 transitions. Second operand 35 states. [2020-10-29 09:36:34,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:36:34,913 INFO L93 Difference]: Finished difference Result 219 states and 222 transitions. [2020-10-29 09:36:34,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-29 09:36:34,914 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 140 [2020-10-29 09:36:34,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:36:34,915 INFO L225 Difference]: With dead ends: 219 [2020-10-29 09:36:34,916 INFO L226 Difference]: Without dead ends: 147 [2020-10-29 09:36:34,917 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-29 09:36:34,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-29 09:36:34,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 145. [2020-10-29 09:36:34,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-29 09:36:34,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 146 transitions. [2020-10-29 09:36:34,926 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 146 transitions. Word has length 140 [2020-10-29 09:36:34,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:36:34,926 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 146 transitions. [2020-10-29 09:36:34,926 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-29 09:36:34,926 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 146 transitions. [2020-10-29 09:36:34,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-10-29 09:36:34,927 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:36:34,927 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:36:34,927 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-29 09:36:34,928 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:36:34,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:36:34,928 INFO L82 PathProgramCache]: Analyzing trace with hash 156985185, now seen corresponding path program 32 times [2020-10-29 09:36:34,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:36:34,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [183249354] [2020-10-29 09:36:34,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:36:34,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:36:34,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:40,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:36:40,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 154 [2020-10-29 09:36:40,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:36:40,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5297 [2020-10-29 09:36:40,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:36:40,266 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:36:40,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-29 09:36:40,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:36:40,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-29 09:36:40,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:36:41,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:36:41,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:36:41,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:41,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:36:41,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:36:41,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:36:41,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:36:41,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:36:41,185 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:36:41,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:36:41,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:36:41,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:36:41,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:36:41,208 INFO L134 CoverageAnalysis]: Checked inductivity of 2048 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 1024 trivial. 0 not checked. [2020-10-29 09:36:41,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [183249354] [2020-10-29 09:36:41,212 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:36:41,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-29 09:36:41,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487598014] [2020-10-29 09:36:41,214 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-29 09:36:41,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:36:41,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-29 09:36:41,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-29 09:36:41,215 INFO L87 Difference]: Start difference. First operand 145 states and 146 transitions. Second operand 36 states. [2020-10-29 09:36:41,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:36:41,752 INFO L93 Difference]: Finished difference Result 225 states and 228 transitions. [2020-10-29 09:36:41,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-29 09:36:41,753 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 144 [2020-10-29 09:36:41,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:36:41,755 INFO L225 Difference]: With dead ends: 225 [2020-10-29 09:36:41,755 INFO L226 Difference]: Without dead ends: 151 [2020-10-29 09:36:41,756 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-29 09:36:41,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-29 09:36:41,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 149. [2020-10-29 09:36:41,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-10-29 09:36:41,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 150 transitions. [2020-10-29 09:36:41,763 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 150 transitions. Word has length 144 [2020-10-29 09:36:41,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:36:41,763 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 150 transitions. [2020-10-29 09:36:41,763 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-29 09:36:41,764 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 150 transitions. [2020-10-29 09:36:41,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-10-29 09:36:41,764 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:36:41,765 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:36:41,765 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-29 09:36:41,765 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:36:41,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:36:41,765 INFO L82 PathProgramCache]: Analyzing trace with hash -505372699, now seen corresponding path program 33 times [2020-10-29 09:36:41,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:36:41,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1359564088] [2020-10-29 09:36:41,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:36:41,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:36:41,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:46,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:36:46,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 158 [2020-10-29 09:36:46,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:36:46,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5036 [2020-10-29 09:36:46,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:36:46,842 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:36:46,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-29 09:36:46,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:36:46,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-29 09:36:46,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:36:47,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:36:47,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:36:47,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:47,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:36:47,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:36:47,855 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:36:47,855 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-29 09:36:47,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:36:47,856 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:36:47,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:36:47,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:36:47,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:36:47,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:36:47,871 INFO L134 CoverageAnalysis]: Checked inductivity of 2178 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 1089 trivial. 0 not checked. [2020-10-29 09:36:47,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1359564088] [2020-10-29 09:36:47,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:36:47,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-29 09:36:47,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014777782] [2020-10-29 09:36:47,873 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-29 09:36:47,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:36:47,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-29 09:36:47,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-29 09:36:47,874 INFO L87 Difference]: Start difference. First operand 149 states and 150 transitions. Second operand 37 states. [2020-10-29 09:36:48,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:36:48,335 INFO L93 Difference]: Finished difference Result 231 states and 234 transitions. [2020-10-29 09:36:48,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-29 09:36:48,336 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 148 [2020-10-29 09:36:48,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:36:48,337 INFO L225 Difference]: With dead ends: 231 [2020-10-29 09:36:48,337 INFO L226 Difference]: Without dead ends: 155 [2020-10-29 09:36:48,338 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-29 09:36:48,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-29 09:36:48,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 153. [2020-10-29 09:36:48,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-10-29 09:36:48,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 154 transitions. [2020-10-29 09:36:48,345 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 154 transitions. Word has length 148 [2020-10-29 09:36:48,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:36:48,345 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 154 transitions. [2020-10-29 09:36:48,345 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-29 09:36:48,345 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 154 transitions. [2020-10-29 09:36:48,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-10-29 09:36:48,346 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:36:48,346 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:36:48,347 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-29 09:36:48,347 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:36:48,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:36:48,347 INFO L82 PathProgramCache]: Analyzing trace with hash 182650473, now seen corresponding path program 34 times [2020-10-29 09:36:48,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:36:48,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1661632295] [2020-10-29 09:36:48,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:36:48,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:36:48,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:53,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:36:53,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 162 [2020-10-29 09:36:53,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:36:53,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5151 [2020-10-29 09:36:53,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:36:53,549 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:36:53,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-29 09:36:53,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:36:53,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-29 09:36:53,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:36:54,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:36:54,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:36:54,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:54,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:36:54,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:36:54,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:36:54,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:36:54,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:36:54,576 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:36:54,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:36:54,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:36:54,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:36:54,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:36:54,616 INFO L134 CoverageAnalysis]: Checked inductivity of 2312 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 1156 trivial. 0 not checked. [2020-10-29 09:36:54,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1661632295] [2020-10-29 09:36:54,617 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:36:54,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-29 09:36:54,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024113816] [2020-10-29 09:36:54,617 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-29 09:36:54,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:36:54,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-29 09:36:54,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-29 09:36:54,618 INFO L87 Difference]: Start difference. First operand 153 states and 154 transitions. Second operand 38 states. [2020-10-29 09:36:55,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:36:55,189 INFO L93 Difference]: Finished difference Result 237 states and 240 transitions. [2020-10-29 09:36:55,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-29 09:36:55,189 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 152 [2020-10-29 09:36:55,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:36:55,191 INFO L225 Difference]: With dead ends: 237 [2020-10-29 09:36:55,191 INFO L226 Difference]: Without dead ends: 159 [2020-10-29 09:36:55,192 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-29 09:36:55,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-29 09:36:55,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 157. [2020-10-29 09:36:55,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-29 09:36:55,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 158 transitions. [2020-10-29 09:36:55,209 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 158 transitions. Word has length 152 [2020-10-29 09:36:55,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:36:55,209 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 158 transitions. [2020-10-29 09:36:55,210 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-29 09:36:55,210 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 158 transitions. [2020-10-29 09:36:55,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-10-29 09:36:55,211 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:36:55,211 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:36:55,212 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-29 09:36:55,212 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:36:55,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:36:55,214 INFO L82 PathProgramCache]: Analyzing trace with hash 890739437, now seen corresponding path program 35 times [2020-10-29 09:36:55,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:36:55,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1195905449] [2020-10-29 09:36:55,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:36:55,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:36:55,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:00,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:00,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 166 [2020-10-29 09:37:00,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:00,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5147 [2020-10-29 09:37:00,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:00,426 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:00,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-29 09:37:00,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:37:00,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-29 09:37:00,427 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:01,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:37:01,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:01,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:01,527 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:01,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:37:01,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:01,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:37:01,528 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:01,528 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:01,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:37:01,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:37:01,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:37:01,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:01,554 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 1225 trivial. 0 not checked. [2020-10-29 09:37:01,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1195905449] [2020-10-29 09:37:01,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:37:01,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-29 09:37:01,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066500286] [2020-10-29 09:37:01,556 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-29 09:37:01,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:37:01,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-29 09:37:01,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-29 09:37:01,557 INFO L87 Difference]: Start difference. First operand 157 states and 158 transitions. Second operand 39 states. [2020-10-29 09:37:02,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:37:02,154 INFO L93 Difference]: Finished difference Result 243 states and 246 transitions. [2020-10-29 09:37:02,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-29 09:37:02,154 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 156 [2020-10-29 09:37:02,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:37:02,156 INFO L225 Difference]: With dead ends: 243 [2020-10-29 09:37:02,156 INFO L226 Difference]: Without dead ends: 163 [2020-10-29 09:37:02,158 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-29 09:37:02,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-29 09:37:02,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 161. [2020-10-29 09:37:02,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-29 09:37:02,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 162 transitions. [2020-10-29 09:37:02,165 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 162 transitions. Word has length 156 [2020-10-29 09:37:02,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:37:02,165 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 162 transitions. [2020-10-29 09:37:02,165 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-29 09:37:02,165 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 162 transitions. [2020-10-29 09:37:02,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-10-29 09:37:02,166 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:37:02,167 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:37:02,167 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-29 09:37:02,167 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:37:02,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:37:02,167 INFO L82 PathProgramCache]: Analyzing trace with hash -541893263, now seen corresponding path program 36 times [2020-10-29 09:37:02,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:37:02,168 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1894014165] [2020-10-29 09:37:02,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:37:02,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:02,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:07,507 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:07,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 170 [2020-10-29 09:37:07,508 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:07,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5295 [2020-10-29 09:37:07,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:07,508 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:07,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-29 09:37:07,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:37:07,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-29 09:37:07,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:08,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:37:08,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:08,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:08,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:08,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:37:08,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:08,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:37:08,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:08,628 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:08,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:37:08,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:37:08,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:37:08,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:08,647 INFO L134 CoverageAnalysis]: Checked inductivity of 2592 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 1296 trivial. 0 not checked. [2020-10-29 09:37:08,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1894014165] [2020-10-29 09:37:08,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:37:08,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-29 09:37:08,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904856317] [2020-10-29 09:37:08,648 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-29 09:37:08,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:37:08,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-29 09:37:08,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-29 09:37:08,649 INFO L87 Difference]: Start difference. First operand 161 states and 162 transitions. Second operand 40 states. [2020-10-29 09:37:09,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:37:09,257 INFO L93 Difference]: Finished difference Result 249 states and 252 transitions. [2020-10-29 09:37:09,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-29 09:37:09,257 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 160 [2020-10-29 09:37:09,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:37:09,259 INFO L225 Difference]: With dead ends: 249 [2020-10-29 09:37:09,260 INFO L226 Difference]: Without dead ends: 167 [2020-10-29 09:37:09,261 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-29 09:37:09,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-29 09:37:09,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 165. [2020-10-29 09:37:09,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-29 09:37:09,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 166 transitions. [2020-10-29 09:37:09,268 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 166 transitions. Word has length 160 [2020-10-29 09:37:09,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:37:09,269 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 166 transitions. [2020-10-29 09:37:09,269 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-29 09:37:09,269 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 166 transitions. [2020-10-29 09:37:09,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2020-10-29 09:37:09,270 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:37:09,270 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:37:09,270 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-29 09:37:09,270 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:37:09,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:37:09,271 INFO L82 PathProgramCache]: Analyzing trace with hash -664056331, now seen corresponding path program 37 times [2020-10-29 09:37:09,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:37:09,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1403327473] [2020-10-29 09:37:09,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:37:09,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:09,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:14,588 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:14,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 174 [2020-10-29 09:37:14,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:14,589 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5273 [2020-10-29 09:37:14,589 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:14,589 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:14,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-29 09:37:14,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:37:14,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-29 09:37:14,590 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:15,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:37:15,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:15,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:15,790 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:15,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:37:15,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:15,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:37:15,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:15,791 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:15,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:37:15,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:37:15,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:37:15,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:15,833 INFO L134 CoverageAnalysis]: Checked inductivity of 2738 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 1369 trivial. 0 not checked. [2020-10-29 09:37:15,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1403327473] [2020-10-29 09:37:15,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:37:15,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-29 09:37:15,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76946047] [2020-10-29 09:37:15,834 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-29 09:37:15,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:37:15,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-29 09:37:15,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-29 09:37:15,835 INFO L87 Difference]: Start difference. First operand 165 states and 166 transitions. Second operand 41 states. [2020-10-29 09:37:16,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:37:16,335 INFO L93 Difference]: Finished difference Result 255 states and 258 transitions. [2020-10-29 09:37:16,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-29 09:37:16,336 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 164 [2020-10-29 09:37:16,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:37:16,337 INFO L225 Difference]: With dead ends: 255 [2020-10-29 09:37:16,338 INFO L226 Difference]: Without dead ends: 171 [2020-10-29 09:37:16,339 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-29 09:37:16,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-10-29 09:37:16,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 169. [2020-10-29 09:37:16,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-29 09:37:16,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 170 transitions. [2020-10-29 09:37:16,346 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 170 transitions. Word has length 164 [2020-10-29 09:37:16,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:37:16,346 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 170 transitions. [2020-10-29 09:37:16,347 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-29 09:37:16,347 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 170 transitions. [2020-10-29 09:37:16,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-10-29 09:37:16,348 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:37:16,348 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:37:16,348 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-29 09:37:16,348 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:37:16,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:37:16,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1149997959, now seen corresponding path program 38 times [2020-10-29 09:37:16,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:37:16,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1859860111] [2020-10-29 09:37:16,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:37:16,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:16,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:21,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:21,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 178 [2020-10-29 09:37:21,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:21,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5414 [2020-10-29 09:37:21,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:21,811 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:21,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-29 09:37:21,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:37:21,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-29 09:37:21,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:22,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:37:23,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:23,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:23,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:23,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:37:23,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:23,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:37:23,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:23,022 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:23,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:37:23,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:37:23,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:37:23,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:23,040 INFO L134 CoverageAnalysis]: Checked inductivity of 2888 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 1444 trivial. 0 not checked. [2020-10-29 09:37:23,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1859860111] [2020-10-29 09:37:23,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:37:23,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-29 09:37:23,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402534000] [2020-10-29 09:37:23,041 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-29 09:37:23,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:37:23,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-29 09:37:23,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-29 09:37:23,042 INFO L87 Difference]: Start difference. First operand 169 states and 170 transitions. Second operand 42 states. [2020-10-29 09:37:23,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:37:23,672 INFO L93 Difference]: Finished difference Result 261 states and 264 transitions. [2020-10-29 09:37:23,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-29 09:37:23,672 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 168 [2020-10-29 09:37:23,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:37:23,673 INFO L225 Difference]: With dead ends: 261 [2020-10-29 09:37:23,673 INFO L226 Difference]: Without dead ends: 175 [2020-10-29 09:37:23,675 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-29 09:37:23,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-10-29 09:37:23,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 173. [2020-10-29 09:37:23,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-10-29 09:37:23,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 174 transitions. [2020-10-29 09:37:23,682 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 174 transitions. Word has length 168 [2020-10-29 09:37:23,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:37:23,682 INFO L481 AbstractCegarLoop]: Abstraction has 173 states and 174 transitions. [2020-10-29 09:37:23,682 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-29 09:37:23,683 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 174 transitions. [2020-10-29 09:37:23,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2020-10-29 09:37:23,684 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:37:23,684 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:37:23,684 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-29 09:37:23,684 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:37:23,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:37:23,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1938012413, now seen corresponding path program 39 times [2020-10-29 09:37:23,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:37:23,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1546753773] [2020-10-29 09:37:23,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:37:23,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:23,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:23,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:28,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:28,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 182 [2020-10-29 09:37:28,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:37:28,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5101 [2020-10-29 09:37:28,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:28,842 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:28,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-29 09:37:28,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 91 [2020-10-29 09:37:28,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-29 09:37:28,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:30,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:37:30,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:30,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:30,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:30,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:37:30,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:30,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:37:30,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:30,119 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:30,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:37:30,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:37:30,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:37:30,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:30,139 INFO L134 CoverageAnalysis]: Checked inductivity of 3042 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 1521 trivial. 0 not checked. [2020-10-29 09:37:30,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1546753773] [2020-10-29 09:37:30,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:37:30,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-29 09:37:30,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998263186] [2020-10-29 09:37:30,140 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-29 09:37:30,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:37:30,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-29 09:37:30,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-29 09:37:30,141 INFO L87 Difference]: Start difference. First operand 173 states and 174 transitions. Second operand 43 states. [2020-10-29 09:37:30,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:37:30,792 INFO L93 Difference]: Finished difference Result 267 states and 270 transitions. [2020-10-29 09:37:30,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-29 09:37:30,793 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 172 [2020-10-29 09:37:30,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:37:30,794 INFO L225 Difference]: With dead ends: 267 [2020-10-29 09:37:30,795 INFO L226 Difference]: Without dead ends: 179 [2020-10-29 09:37:30,796 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-29 09:37:30,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-10-29 09:37:30,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 177. [2020-10-29 09:37:30,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-10-29 09:37:30,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 178 transitions. [2020-10-29 09:37:30,803 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 178 transitions. Word has length 172 [2020-10-29 09:37:30,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:37:30,804 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 178 transitions. [2020-10-29 09:37:30,804 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-29 09:37:30,804 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 178 transitions. [2020-10-29 09:37:30,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-10-29 09:37:30,805 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:37:30,805 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:37:30,805 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-29 09:37:30,805 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:37:30,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:37:30,806 INFO L82 PathProgramCache]: Analyzing trace with hash -1177668735, now seen corresponding path program 40 times [2020-10-29 09:37:30,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:37:30,806 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [366178748] [2020-10-29 09:37:30,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:37:30,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:30,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:36,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:36,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 186 [2020-10-29 09:37:36,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:36,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5165 [2020-10-29 09:37:36,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:36,024 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:36,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-29 09:37:36,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:37:36,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-29 09:37:36,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:37,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:37:37,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:37,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:37,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:37,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:37:37,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:37,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 09:37:37,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:37,386 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:37,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:37:37,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:37:37,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:37:37,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:37,408 INFO L134 CoverageAnalysis]: Checked inductivity of 3200 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 1600 trivial. 0 not checked. [2020-10-29 09:37:37,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [366178748] [2020-10-29 09:37:37,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:37:37,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-29 09:37:37,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97465236] [2020-10-29 09:37:37,409 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-29 09:37:37,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:37:37,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-29 09:37:37,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-29 09:37:37,410 INFO L87 Difference]: Start difference. First operand 177 states and 178 transitions. Second operand 44 states. [2020-10-29 09:37:38,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:37:38,090 INFO L93 Difference]: Finished difference Result 273 states and 276 transitions. [2020-10-29 09:37:38,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-29 09:37:38,091 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 176 [2020-10-29 09:37:38,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:37:38,092 INFO L225 Difference]: With dead ends: 273 [2020-10-29 09:37:38,092 INFO L226 Difference]: Without dead ends: 183 [2020-10-29 09:37:38,094 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-29 09:37:38,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-29 09:37:38,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 181. [2020-10-29 09:37:38,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-10-29 09:37:38,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 182 transitions. [2020-10-29 09:37:38,100 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 182 transitions. Word has length 176 [2020-10-29 09:37:38,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:37:38,101 INFO L481 AbstractCegarLoop]: Abstraction has 181 states and 182 transitions. [2020-10-29 09:37:38,101 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-29 09:37:38,101 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 182 transitions. [2020-10-29 09:37:38,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2020-10-29 09:37:38,102 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:37:38,102 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:37:38,102 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-29 09:37:38,102 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:37:38,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:37:38,103 INFO L82 PathProgramCache]: Analyzing trace with hash -1777804283, now seen corresponding path program 41 times [2020-10-29 09:37:38,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:37:38,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [951977699] [2020-10-29 09:37:38,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:37:38,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:38,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking...