/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/eca-rers2012/Problem17_label52.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 08:23:52,545 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 08:23:52,548 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 08:23:52,589 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 08:23:52,590 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 08:23:52,591 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 08:23:52,593 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 08:23:52,595 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 08:23:52,598 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 08:23:52,599 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 08:23:52,600 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 08:23:52,601 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 08:23:52,602 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 08:23:52,603 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 08:23:52,605 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 08:23:52,606 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 08:23:52,607 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 08:23:52,608 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 08:23:52,610 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 08:23:52,612 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 08:23:52,625 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 08:23:52,627 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 08:23:52,630 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 08:23:52,631 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 08:23:52,638 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 08:23:52,642 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 08:23:52,643 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 08:23:52,644 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 08:23:52,644 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 08:23:52,647 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 08:23:52,647 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 08:23:52,648 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 08:23:52,649 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 08:23:52,650 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 08:23:52,651 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 08:23:52,652 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 08:23:52,653 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 08:23:52,654 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 08:23:52,654 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 08:23:52,655 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 08:23:52,656 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 08:23:52,658 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 08:23:52,712 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 08:23:52,713 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 08:23:52,717 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 08:23:52,717 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 08:23:52,717 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 08:23:52,718 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 08:23:52,718 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 08:23:52,718 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 08:23:52,718 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 08:23:52,719 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 08:23:52,720 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 08:23:52,720 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 08:23:52,720 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 08:23:52,720 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 08:23:52,721 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 08:23:52,721 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 08:23:52,721 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 08:23:52,721 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 08:23:52,722 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 08:23:52,722 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 08:23:52,722 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 08:23:52,722 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 08:23:52,722 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 08:23:52,723 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 08:23:52,723 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 08:23:52,723 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 08:23:52,723 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 08:23:52,723 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 08:23:52,723 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 08:23:52,724 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 08:23:53,162 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 08:23:53,209 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 08:23:53,213 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 08:23:53,215 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 08:23:53,215 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 08:23:53,217 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label52.c [2020-10-29 08:23:53,290 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3598637b7/bc6398b07396404cbf70560b73174ab7/FLAG7a0199e42 [2020-10-29 08:23:54,164 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 08:23:54,165 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem17_label52.c [2020-10-29 08:23:54,205 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3598637b7/bc6398b07396404cbf70560b73174ab7/FLAG7a0199e42 [2020-10-29 08:23:54,238 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3598637b7/bc6398b07396404cbf70560b73174ab7 [2020-10-29 08:23:54,243 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 08:23:54,254 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 08:23:54,256 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 08:23:54,256 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 08:23:54,261 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 08:23:54,262 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 08:23:54" (1/1) ... [2020-10-29 08:23:54,272 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@545e12b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:23:54, skipping insertion in model container [2020-10-29 08:23:54,272 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 08:23:54" (1/1) ... [2020-10-29 08:23:54,283 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 08:23:54,408 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 08:23:55,417 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 08:23:55,433 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 08:23:55,925 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 08:23:55,953 INFO L208 MainTranslator]: Completed translation [2020-10-29 08:23:55,954 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:23:55 WrapperNode [2020-10-29 08:23:55,955 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 08:23:55,956 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 08:23:55,956 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 08:23:55,956 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 08:23:55,971 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:23:55" (1/1) ... [2020-10-29 08:23:55,973 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:23:55" (1/1) ... [2020-10-29 08:23:56,042 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:23:55" (1/1) ... [2020-10-29 08:23:56,042 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:23:55" (1/1) ... [2020-10-29 08:23:56,156 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:23:55" (1/1) ... [2020-10-29 08:23:56,256 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:23:55" (1/1) ... [2020-10-29 08:23:56,292 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:23:55" (1/1) ... [2020-10-29 08:23:56,331 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 08:23:56,333 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 08:23:56,333 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 08:23:56,333 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 08:23:56,334 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:23:55" (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 08:23:56,413 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 08:23:56,414 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 08:23:56,414 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 08:23:56,414 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-29 08:23:56,415 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-29 08:23:56,415 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 08:23:56,415 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-29 08:23:56,415 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-29 08:23:56,415 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 08:23:56,415 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 08:23:56,416 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 08:23:56,417 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 08:23:56,417 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-29 08:23:56,417 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-29 08:23:56,417 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 08:23:56,418 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 08:23:56,418 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 08:23:56,418 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 08:23:56,418 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 08:23:56,418 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 08:23:56,419 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 08:24:05,559 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 08:24:05,559 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-29 08:24:05,562 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 08:24:05 BoogieIcfgContainer [2020-10-29 08:24:05,562 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 08:24:05,564 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 08:24:05,564 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 08:24:05,568 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 08:24:05,568 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 08:23:54" (1/3) ... [2020-10-29 08:24:05,569 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@123ddd89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 08:24:05, skipping insertion in model container [2020-10-29 08:24:05,569 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:23:55" (2/3) ... [2020-10-29 08:24:05,569 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@123ddd89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 08:24:05, skipping insertion in model container [2020-10-29 08:24:05,569 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 08:24:05" (3/3) ... [2020-10-29 08:24:05,571 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label52.c [2020-10-29 08:24:05,583 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 08:24:05,589 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 08:24:05,602 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 08:24:05,634 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 08:24:05,634 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 08:24:05,635 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 08:24:05,635 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 08:24:05,635 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 08:24:05,635 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 08:24:05,635 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 08:24:05,635 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 08:24:05,665 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states. [2020-10-29 08:24:05,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-29 08:24:05,672 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:24:05,673 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 08:24:05,674 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:24:05,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:24:05,688 INFO L82 PathProgramCache]: Analyzing trace with hash 1136571011, now seen corresponding path program 1 times [2020-10-29 08:24:05,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:24:05,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [297374647] [2020-10-29 08:24:05,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:24:05,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:24:05,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:24:06,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:24:06,242 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-29 08:24:06,242 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:24:06,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 397 [2020-10-29 08:24:06,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:24:06,245 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:24:06,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 08:24:06,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 08:24:06,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-29 08:24:06,246 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 08:24:06,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:24:06,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:24:06,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:24:06,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:24:06,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:24:06,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:24:06,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-29 08:24:06,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:24:06,421 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:24:06,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:24:06,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:24:06,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 08:24:06,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:24:06,437 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 08:24:06,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [297374647] [2020-10-29 08:24:06,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 08:24:06,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-29 08:24:06,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102013364] [2020-10-29 08:24:06,448 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 08:24:06,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:24:06,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 08:24:06,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 08:24:06,468 INFO L87 Difference]: Start difference. First operand 607 states. Second operand 4 states. [2020-10-29 08:24:20,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:24:20,321 INFO L93 Difference]: Finished difference Result 1697 states and 3097 transitions. [2020-10-29 08:24:20,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 08:24:20,324 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-10-29 08:24:20,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:24:20,357 INFO L225 Difference]: With dead ends: 1697 [2020-10-29 08:24:20,358 INFO L226 Difference]: Without dead ends: 1013 [2020-10-29 08:24:20,372 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 08:24:20,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013 states. [2020-10-29 08:24:20,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013 to 1003. [2020-10-29 08:24:20,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1003 states. [2020-10-29 08:24:20,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1003 states to 1003 states and 1543 transitions. [2020-10-29 08:24:20,507 INFO L78 Accepts]: Start accepts. Automaton has 1003 states and 1543 transitions. Word has length 13 [2020-10-29 08:24:20,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:24:20,508 INFO L481 AbstractCegarLoop]: Abstraction has 1003 states and 1543 transitions. [2020-10-29 08:24:20,509 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 08:24:20,509 INFO L276 IsEmpty]: Start isEmpty. Operand 1003 states and 1543 transitions. [2020-10-29 08:24:20,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-29 08:24:20,513 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:24:20,514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 08:24:20,514 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 08:24:20,514 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:24:20,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:24:20,517 INFO L82 PathProgramCache]: Analyzing trace with hash -760582750, now seen corresponding path program 1 times [2020-10-29 08:24:20,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:24:20,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [161652691] [2020-10-29 08:24:20,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:24:20,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:24:20,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:24:21,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:24:21,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:24:21,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-29 08:24:21,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 08:24:21,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1190 [2020-10-29 08:24:21,821 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:24:21,822 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:24:21,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 08:24:21,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 08:24:21,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-29 08:24:21,822 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:24:21,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:24:21,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:24:21,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:24:21,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:24:21,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:24:21,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:24:21,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-29 08:24:21,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:24:21,977 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:24:21,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:24:21,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:24:21,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 08:24:21,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:24:22,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:24:22,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:24:22,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:24:22,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:24:22,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-29 08:24:22,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:24:22,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 247 [2020-10-29 08:24:22,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:24:22,300 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:24:22,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:24:22,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:24:22,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-29 08:24:22,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:24:22,402 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 08:24:22,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [161652691] [2020-10-29 08:24:22,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 08:24:22,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 08:24:22,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425127523] [2020-10-29 08:24:22,406 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 08:24:22,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:24:22,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 08:24:22,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-29 08:24:22,412 INFO L87 Difference]: Start difference. First operand 1003 states and 1543 transitions. Second operand 7 states. [2020-10-29 08:24:37,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:24:37,941 INFO L93 Difference]: Finished difference Result 2964 states and 4573 transitions. [2020-10-29 08:24:37,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 08:24:37,942 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 84 [2020-10-29 08:24:37,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:24:37,954 INFO L225 Difference]: With dead ends: 2964 [2020-10-29 08:24:37,954 INFO L226 Difference]: Without dead ends: 1967 [2020-10-29 08:24:37,958 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-29 08:24:37,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1967 states. [2020-10-29 08:24:38,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1967 to 1915. [2020-10-29 08:24:38,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1915 states. [2020-10-29 08:24:38,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1915 states to 1915 states and 2483 transitions. [2020-10-29 08:24:38,055 INFO L78 Accepts]: Start accepts. Automaton has 1915 states and 2483 transitions. Word has length 84 [2020-10-29 08:24:38,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:24:38,056 INFO L481 AbstractCegarLoop]: Abstraction has 1915 states and 2483 transitions. [2020-10-29 08:24:38,056 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 08:24:38,056 INFO L276 IsEmpty]: Start isEmpty. Operand 1915 states and 2483 transitions. [2020-10-29 08:24:38,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-29 08:24:38,061 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:24:38,062 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 08:24:38,062 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 08:24:38,062 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:24:38,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:24:38,064 INFO L82 PathProgramCache]: Analyzing trace with hash -740134761, now seen corresponding path program 1 times [2020-10-29 08:24:38,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:24:38,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [404513748] [2020-10-29 08:24:38,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:24:38,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:24:38,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:24:38,413 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:24:38,413 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-29 08:24:38,413 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:24:38,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 300 [2020-10-29 08:24:38,414 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:24:38,414 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:24:38,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:24:38,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 84 [2020-10-29 08:24:38,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-29 08:24:38,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:24:38,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:24:38,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:24:38,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:24:38,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:24:38,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:24:38,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:24:38,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 08:24:38,518 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:24:38,518 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:24:38,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 08:24:38,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:24:38,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 08:24:38,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:24:38,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:24:38,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:24:38,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:24:38,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:24:38,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-29 08:24:38,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:24:38,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 89 [2020-10-29 08:24:38,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:24:38,654 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:24:38,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:24:38,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:24:38,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-29 08:24:38,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:24:38,695 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 08:24:38,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [404513748] [2020-10-29 08:24:38,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 08:24:38,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-29 08:24:38,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582223800] [2020-10-29 08:24:38,697 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 08:24:38,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:24:38,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 08:24:38,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-29 08:24:38,698 INFO L87 Difference]: Start difference. First operand 1915 states and 2483 transitions. Second operand 5 states. [2020-10-29 08:24:53,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:24:53,232 INFO L93 Difference]: Finished difference Result 4732 states and 6292 transitions. [2020-10-29 08:24:53,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 08:24:53,234 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 87 [2020-10-29 08:24:53,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:24:53,247 INFO L225 Difference]: With dead ends: 4732 [2020-10-29 08:24:53,247 INFO L226 Difference]: Without dead ends: 2377 [2020-10-29 08:24:53,253 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-29 08:24:53,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2377 states. [2020-10-29 08:24:53,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2377 to 2358. [2020-10-29 08:24:53,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2358 states. [2020-10-29 08:24:53,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2358 states to 2358 states and 2901 transitions. [2020-10-29 08:24:53,323 INFO L78 Accepts]: Start accepts. Automaton has 2358 states and 2901 transitions. Word has length 87 [2020-10-29 08:24:53,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:24:53,324 INFO L481 AbstractCegarLoop]: Abstraction has 2358 states and 2901 transitions. [2020-10-29 08:24:53,324 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 08:24:53,324 INFO L276 IsEmpty]: Start isEmpty. Operand 2358 states and 2901 transitions. [2020-10-29 08:24:53,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-10-29 08:24:53,327 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:24:53,328 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 08:24:53,328 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 08:24:53,328 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:24:53,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:24:53,329 INFO L82 PathProgramCache]: Analyzing trace with hash -1458581017, now seen corresponding path program 1 times [2020-10-29 08:24:53,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:24:53,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1761155978] [2020-10-29 08:24:53,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:24:53,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:24:53,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:24:53,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:24:54,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:24:54,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 187 [2020-10-29 08:24:54,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 08:24:54,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1255 [2020-10-29 08:24:54,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:24:54,634 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:24:54,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:24:54,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-29 08:24:54,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-29 08:24:54,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:24:54,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:24:54,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:24:54,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:24:54,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:24:54,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:24:54,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:24:54,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-29 08:24:54,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:24:54,776 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:24:54,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 08:24:54,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:24:54,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 08:24:54,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:24:54,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:24:54,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:24:54,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:24:54,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:24:54,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-29 08:24:54,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:24:54,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 128 [2020-10-29 08:24:54,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:24:54,957 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:24:54,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:24:54,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:24:54,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-29 08:24:54,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:24:55,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-29 08:24:55,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:24:55,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:24:55,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:24:55,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-29 08:24:55,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:24:55,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 191 [2020-10-29 08:24:55,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:24:55,240 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:24:55,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:24:55,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:24:55,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-29 08:24:55,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:24:55,345 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 80 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-29 08:24:55,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1761155978] [2020-10-29 08:24:55,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 08:24:55,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 08:24:55,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576571320] [2020-10-29 08:24:55,347 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 08:24:55,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:24:55,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 08:24:55,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-29 08:24:55,348 INFO L87 Difference]: Start difference. First operand 2358 states and 2901 transitions. Second operand 7 states. [2020-10-29 08:25:07,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:25:07,853 INFO L93 Difference]: Finished difference Result 6080 states and 7748 transitions. [2020-10-29 08:25:07,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 08:25:07,854 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 173 [2020-10-29 08:25:07,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:25:07,881 INFO L225 Difference]: With dead ends: 6080 [2020-10-29 08:25:07,881 INFO L226 Difference]: Without dead ends: 3728 [2020-10-29 08:25:07,888 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-29 08:25:07,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3728 states. [2020-10-29 08:25:07,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3728 to 3720. [2020-10-29 08:25:07,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3720 states. [2020-10-29 08:25:08,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3720 states to 3720 states and 4554 transitions. [2020-10-29 08:25:08,017 INFO L78 Accepts]: Start accepts. Automaton has 3720 states and 4554 transitions. Word has length 173 [2020-10-29 08:25:08,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:25:08,018 INFO L481 AbstractCegarLoop]: Abstraction has 3720 states and 4554 transitions. [2020-10-29 08:25:08,019 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 08:25:08,019 INFO L276 IsEmpty]: Start isEmpty. Operand 3720 states and 4554 transitions. [2020-10-29 08:25:08,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-10-29 08:25:08,029 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:25:08,029 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 08:25:08,029 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 08:25:08,030 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:25:08,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:25:08,030 INFO L82 PathProgramCache]: Analyzing trace with hash 492180171, now seen corresponding path program 1 times [2020-10-29 08:25:08,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:25:08,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [757960712] [2020-10-29 08:25:08,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:25:08,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:25:08,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:25:08,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:25:09,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:25:11,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:25:11,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 189 [2020-10-29 08:25:11,517 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 08:25:11,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3422 [2020-10-29 08:25:11,518 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:25:11,519 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:25:11,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 08:25:11,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 08:25:11,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 170 [2020-10-29 08:25:11,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:25:11,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:25:11,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:25:11,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:25:11,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:25:11,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:25:11,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:25:11,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-29 08:25:11,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:25:11,722 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:25:11,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:25:11,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:25:11,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 08:25:11,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:25:11,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:25:11,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:25:11,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:25:12,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:25:12,043 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-29 08:25:12,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:25:12,044 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 262 [2020-10-29 08:25:12,044 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:25:12,044 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:25:12,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 08:25:12,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:25:12,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-29 08:25:12,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:25:12,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-29 08:25:12,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:25:12,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:25:12,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:25:12,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-29 08:25:12,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:25:12,305 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 155 [2020-10-29 08:25:12,305 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:25:12,306 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:25:12,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:25:12,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:25:12,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-29 08:25:12,306 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:25:12,556 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 14 proven. 70 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-29 08:25:12,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [757960712] [2020-10-29 08:25:12,556 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 08:25:12,557 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 08:25:12,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537845722] [2020-10-29 08:25:12,558 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 08:25:12,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:25:12,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 08:25:12,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-29 08:25:12,559 INFO L87 Difference]: Start difference. First operand 3720 states and 4554 transitions. Second operand 10 states. [2020-10-29 08:25:37,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:25:37,104 INFO L93 Difference]: Finished difference Result 11645 states and 14662 transitions. [2020-10-29 08:25:37,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-29 08:25:37,106 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 175 [2020-10-29 08:25:37,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:25:37,152 INFO L225 Difference]: With dead ends: 11645 [2020-10-29 08:25:37,152 INFO L226 Difference]: Without dead ends: 7931 [2020-10-29 08:25:37,162 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=139, Invalid=461, Unknown=0, NotChecked=0, Total=600 [2020-10-29 08:25:37,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7931 states. [2020-10-29 08:25:37,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7931 to 7852. [2020-10-29 08:25:37,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7852 states. [2020-10-29 08:25:37,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7852 states to 7852 states and 9639 transitions. [2020-10-29 08:25:37,381 INFO L78 Accepts]: Start accepts. Automaton has 7852 states and 9639 transitions. Word has length 175 [2020-10-29 08:25:37,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:25:37,383 INFO L481 AbstractCegarLoop]: Abstraction has 7852 states and 9639 transitions. [2020-10-29 08:25:37,383 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 08:25:37,383 INFO L276 IsEmpty]: Start isEmpty. Operand 7852 states and 9639 transitions. [2020-10-29 08:25:37,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-10-29 08:25:37,387 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:25:37,387 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 08:25:37,387 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 08:25:37,387 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:25:37,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:25:37,388 INFO L82 PathProgramCache]: Analyzing trace with hash -1173367787, now seen corresponding path program 1 times [2020-10-29 08:25:37,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:25:37,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1961130909] [2020-10-29 08:25:37,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:25:37,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:25:37,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:25:37,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:25:38,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:25:38,635 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 200 [2020-10-29 08:25:38,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 08:25:38,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1157 [2020-10-29 08:25:38,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:25:38,636 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:25:38,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 08:25:38,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-29 08:25:38,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 99 [2020-10-29 08:25:38,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:25:38,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:25:38,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:25:38,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:25:38,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:25:38,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:25:38,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:25:38,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 08:25:38,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:25:38,772 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:25:38,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 08:25:38,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:25:38,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 08:25:38,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:25:38,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:25:38,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:25:38,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:25:38,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:25:38,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-29 08:25:38,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:25:38,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 94 [2020-10-29 08:25:38,910 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:25:38,911 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:25:38,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:25:38,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:25:38,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-29 08:25:38,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:25:38,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-29 08:25:38,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:25:38,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:25:39,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:25:39,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:25:39,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-29 08:25:39,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 08:25:39,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 294 [2020-10-29 08:25:39,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:25:39,266 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:25:39,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:25:39,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:25:39,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-29 08:25:39,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:25:39,326 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2020-10-29 08:25:39,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1961130909] [2020-10-29 08:25:39,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 08:25:39,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-29 08:25:39,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854297558] [2020-10-29 08:25:39,329 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 08:25:39,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:25:39,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 08:25:39,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-29 08:25:39,330 INFO L87 Difference]: Start difference. First operand 7852 states and 9639 transitions. Second operand 5 states. [2020-10-29 08:25:53,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:25:53,176 INFO L93 Difference]: Finished difference Result 16141 states and 20092 transitions. [2020-10-29 08:25:53,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 08:25:53,177 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 186 [2020-10-29 08:25:53,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:25:53,217 INFO L225 Difference]: With dead ends: 16141 [2020-10-29 08:25:53,217 INFO L226 Difference]: Without dead ends: 8295 [2020-10-29 08:25:53,235 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-29 08:25:53,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8295 states. [2020-10-29 08:25:53,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8295 to 8285. [2020-10-29 08:25:53,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8285 states. [2020-10-29 08:25:53,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8285 states to 8285 states and 10254 transitions. [2020-10-29 08:25:53,447 INFO L78 Accepts]: Start accepts. Automaton has 8285 states and 10254 transitions. Word has length 186 [2020-10-29 08:25:53,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:25:53,449 INFO L481 AbstractCegarLoop]: Abstraction has 8285 states and 10254 transitions. [2020-10-29 08:25:53,449 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 08:25:53,449 INFO L276 IsEmpty]: Start isEmpty. Operand 8285 states and 10254 transitions. [2020-10-29 08:25:53,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2020-10-29 08:25:53,453 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:25:53,454 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 08:25:53,454 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 08:25:53,454 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:25:53,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:25:53,455 INFO L82 PathProgramCache]: Analyzing trace with hash 1235503791, now seen corresponding path program 1 times [2020-10-29 08:25:53,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:25:53,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1119167979] [2020-10-29 08:25:53,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:25:53,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:25:53,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:25:54,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:25:57,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:25:57,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 269 [2020-10-29 08:25:57,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 08:25:57,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3798 [2020-10-29 08:25:57,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:25:57,333 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:25:57,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 08:25:57,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 08:25:57,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 173 [2020-10-29 08:25:57,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:25:57,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:25:57,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:25:57,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:25:57,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:25:57,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:25:57,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:25:57,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-29 08:25:57,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:25:57,503 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:25:57,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:25:57,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:25:57,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 08:25:57,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:25:57,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:25:57,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:25:57,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:25:57,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:25:57,755 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-29 08:25:57,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:25:57,756 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 200 [2020-10-29 08:25:57,756 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:25:57,758 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:25:57,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 08:25:57,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:25:57,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-29 08:25:57,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 08:25:57,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-29 08:25:57,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:25:57,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:25:58,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:25:58,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-29 08:25:58,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:25:58,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 131 [2020-10-29 08:25:58,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:25:58,052 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:25:58,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:25:58,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:25:58,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-29 08:25:58,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:25:58,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2020-10-29 08:25:58,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:25:58,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:25:58,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:25:58,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-29 08:25:58,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:25:58,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-10-29 08:25:58,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:25:58,200 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:25:58,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 08:25:58,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-29 08:25:58,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 08:25:58,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:25:58,392 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 91 proven. 145 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-29 08:25:58,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1119167979] [2020-10-29 08:25:58,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 08:25:58,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 08:25:58,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263040934] [2020-10-29 08:25:58,394 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 08:25:58,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:25:58,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 08:25:58,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-29 08:25:58,396 INFO L87 Difference]: Start difference. First operand 8285 states and 10254 transitions. Second operand 10 states. [2020-10-29 08:25:58,619 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 66 [2020-10-29 08:26:03,521 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-29 08:26:04,542 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 71 [2020-10-29 08:26:05,860 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 67 [2020-10-29 08:26:26,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:26:26,340 INFO L93 Difference]: Finished difference Result 23050 states and 29324 transitions. [2020-10-29 08:26:26,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 08:26:26,342 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 253 [2020-10-29 08:26:26,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:26:26,406 INFO L225 Difference]: With dead ends: 23050 [2020-10-29 08:26:26,406 INFO L226 Difference]: Without dead ends: 13883 [2020-10-29 08:26:26,504 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2020-10-29 08:26:26,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13883 states. [2020-10-29 08:26:26,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13883 to 13809. [2020-10-29 08:26:26,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13809 states. [2020-10-29 08:26:26,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13809 states to 13809 states and 16663 transitions. [2020-10-29 08:26:26,847 INFO L78 Accepts]: Start accepts. Automaton has 13809 states and 16663 transitions. Word has length 253 [2020-10-29 08:26:26,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:26:26,848 INFO L481 AbstractCegarLoop]: Abstraction has 13809 states and 16663 transitions. [2020-10-29 08:26:26,848 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 08:26:26,848 INFO L276 IsEmpty]: Start isEmpty. Operand 13809 states and 16663 transitions. [2020-10-29 08:26:26,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2020-10-29 08:26:26,852 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:26:26,853 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 08:26:26,853 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 08:26:26,853 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:26:26,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:26:26,854 INFO L82 PathProgramCache]: Analyzing trace with hash -953855024, now seen corresponding path program 1 times [2020-10-29 08:26:26,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:26:26,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [364399872] [2020-10-29 08:26:26,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:26:26,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:26:26,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:26:27,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:26:28,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:26:30,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:26:30,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:26:30,886 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 273 [2020-10-29 08:26:30,886 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 08:26:30,886 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3955 [2020-10-29 08:26:30,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:26:30,887 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:26:30,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-29 08:26:30,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 08:26:30,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 264 [2020-10-29 08:26:30,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:26:31,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:26:31,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:26:31,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:26:31,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:26:31,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:26:31,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:26:31,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-29 08:26:31,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:26:31,066 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:26:31,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:26:31,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:26:31,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 08:26:31,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:26:31,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:26:31,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:26:31,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:26:31,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:26:31,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-29 08:26:31,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:26:31,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 177 [2020-10-29 08:26:31,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:26:31,293 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:26:31,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 08:26:31,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:26:31,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-29 08:26:31,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:26:31,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-29 08:26:31,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:26:31,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:26:31,515 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:26:31,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-29 08:26:31,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:26:31,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 130 [2020-10-29 08:26:31,516 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:26:31,517 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:26:31,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:26:31,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:26:31,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-29 08:26:31,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:26:31,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-10-29 08:26:31,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:26:31,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:26:31,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:26:31,690 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-29 08:26:31,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:26:31,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 97 [2020-10-29 08:26:31,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:26:31,691 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:26:31,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:26:31,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:26:31,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-29 08:26:31,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:26:31,926 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 152 proven. 10 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-10-29 08:26:31,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [364399872] [2020-10-29 08:26:31,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 08:26:31,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 08:26:31,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171083898] [2020-10-29 08:26:31,930 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 08:26:31,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:26:31,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 08:26:31,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-29 08:26:31,931 INFO L87 Difference]: Start difference. First operand 13809 states and 16663 transitions. Second operand 9 states. [2020-10-29 08:26:32,104 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-29 08:27:00,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:27:00,407 INFO L93 Difference]: Finished difference Result 39440 states and 51509 transitions. [2020-10-29 08:27:00,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 08:27:00,409 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 257 [2020-10-29 08:27:00,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:27:00,516 INFO L225 Difference]: With dead ends: 39440 [2020-10-29 08:27:00,517 INFO L226 Difference]: Without dead ends: 25590 [2020-10-29 08:27:00,557 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2020-10-29 08:27:00,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25590 states. [2020-10-29 08:27:01,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25590 to 25381. [2020-10-29 08:27:01,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25381 states. [2020-10-29 08:27:01,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25381 states to 25381 states and 31129 transitions. [2020-10-29 08:27:01,306 INFO L78 Accepts]: Start accepts. Automaton has 25381 states and 31129 transitions. Word has length 257 [2020-10-29 08:27:01,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:27:01,306 INFO L481 AbstractCegarLoop]: Abstraction has 25381 states and 31129 transitions. [2020-10-29 08:27:01,306 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 08:27:01,307 INFO L276 IsEmpty]: Start isEmpty. Operand 25381 states and 31129 transitions. [2020-10-29 08:27:01,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2020-10-29 08:27:01,311 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:27:01,311 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 08:27:01,312 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 08:27:01,312 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:27:01,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:27:01,312 INFO L82 PathProgramCache]: Analyzing trace with hash -734756913, now seen corresponding path program 1 times [2020-10-29 08:27:01,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:27:01,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [639920575] [2020-10-29 08:27:01,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:27:01,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:27:01,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:27:01,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:27:01,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:27:02,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:27:06,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:27:06,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 296 [2020-10-29 08:27:06,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 08:27:06,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-29 08:27:06,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:27:06,389 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:27:06,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:27:06,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-29 08:27:06,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-29 08:27:06,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:27:06,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:27:06,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:27:06,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:27:06,580 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:27:06,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:27:06,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:27:06,581 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 08:27:06,581 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:27:06,582 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:27:06,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 08:27:06,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:27:06,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 08:27:06,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:27:06,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:27:06,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:27:06,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:27:06,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:27:06,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-29 08:27:06,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:27:06,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 117 [2020-10-29 08:27:06,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:27:06,772 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:27:06,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:27:06,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:27:06,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-29 08:27:06,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:27:06,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-29 08:27:06,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:27:06,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:27:07,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:27:07,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-29 08:27:07,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:27:07,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 263 [2020-10-29 08:27:07,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:27:07,115 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:27:07,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:27:07,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:27:07,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-29 08:27:07,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:27:07,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 204 [2020-10-29 08:27:07,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:27:07,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:27:07,340 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:27:07,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-29 08:27:07,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:27:07,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-29 08:27:07,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:27:07,341 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:27:07,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 08:27:07,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 69 [2020-10-29 08:27:07,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 08:27:07,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:27:07,562 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 103 proven. 70 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2020-10-29 08:27:07,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [639920575] [2020-10-29 08:27:07,563 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 08:27:07,563 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 08:27:07,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743172932] [2020-10-29 08:27:07,564 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 08:27:07,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:27:07,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 08:27:07,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-29 08:27:07,566 INFO L87 Difference]: Start difference. First operand 25381 states and 31129 transitions. Second operand 7 states. [2020-10-29 08:27:08,397 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-10-29 08:27:26,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:27:26,277 INFO L93 Difference]: Finished difference Result 53064 states and 65187 transitions. [2020-10-29 08:27:26,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 08:27:26,279 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 280 [2020-10-29 08:27:26,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:27:26,376 INFO L225 Difference]: With dead ends: 53064 [2020-10-29 08:27:26,376 INFO L226 Difference]: Without dead ends: 28557 [2020-10-29 08:27:26,418 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-29 08:27:26,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28557 states. [2020-10-29 08:27:27,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28557 to 28508. [2020-10-29 08:27:27,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28508 states. [2020-10-29 08:27:27,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28508 states to 28508 states and 34706 transitions. [2020-10-29 08:27:27,052 INFO L78 Accepts]: Start accepts. Automaton has 28508 states and 34706 transitions. Word has length 280 [2020-10-29 08:27:27,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:27:27,053 INFO L481 AbstractCegarLoop]: Abstraction has 28508 states and 34706 transitions. [2020-10-29 08:27:27,053 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 08:27:27,053 INFO L276 IsEmpty]: Start isEmpty. Operand 28508 states and 34706 transitions. [2020-10-29 08:27:27,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2020-10-29 08:27:27,059 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:27:27,060 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 08:27:27,060 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 08:27:27,060 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:27:27,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:27:27,061 INFO L82 PathProgramCache]: Analyzing trace with hash 1019753302, now seen corresponding path program 1 times [2020-10-29 08:27:27,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:27:27,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1614410850] [2020-10-29 08:27:27,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:27:27,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:27:27,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:27:27,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:27:27,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:27:32,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:27:32,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 377 [2020-10-29 08:27:32,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 08:27:32,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-29 08:27:32,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:27:32,166 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:27:32,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:27:32,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 185 [2020-10-29 08:27:32,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 105 [2020-10-29 08:27:32,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:27:32,350 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-29 08:27:32,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:27:32,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:27:32,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:27:32,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:27:32,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:27:32,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:27:32,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 08:27:32,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:27:32,370 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:27:32,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 08:27:32,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:27:32,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 08:27:32,370 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:27:32,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:27:32,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:27:32,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:27:32,466 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:27:32,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-29 08:27:32,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:27:32,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-10-29 08:27:32,467 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:27:32,467 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:27:32,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 08:27:32,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:27:32,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 08:27:32,468 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:27:32,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-29 08:27:32,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:27:32,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:27:32,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:27:32,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-29 08:27:32,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:27:32,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 127 [2020-10-29 08:27:32,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:27:32,671 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:27:32,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:27:32,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:27:32,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-29 08:27:32,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:27:32,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-10-29 08:27:32,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:27:32,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:27:32,959 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:27:32,960 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-29 08:27:32,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:27:32,960 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 196 [2020-10-29 08:27:32,960 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:27:32,960 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:27:32,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:27:32,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:27:32,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 103 [2020-10-29 08:27:32,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:27:33,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 283 [2020-10-29 08:27:33,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:27:33,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:27:33,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:27:33,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-29 08:27:33,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:27:33,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-29 08:27:33,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:27:33,091 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:27:33,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 08:27:33,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 69 [2020-10-29 08:27:33,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 08:27:33,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:27:33,239 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 200 proven. 70 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-10-29 08:27:33,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1614410850] [2020-10-29 08:27:33,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 08:27:33,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 08:27:33,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730850142] [2020-10-29 08:27:33,241 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 08:27:33,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:27:33,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 08:27:33,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-29 08:27:33,242 INFO L87 Difference]: Start difference. First operand 28508 states and 34706 transitions. Second operand 7 states.