/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem03_label13.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 20:42:44,567 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 20:42:44,571 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 20:42:44,628 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 20:42:44,628 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 20:42:44,635 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 20:42:44,637 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 20:42:44,641 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 20:42:44,645 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 20:42:44,651 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 20:42:44,652 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 20:42:44,654 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 20:42:44,654 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 20:42:44,657 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 20:42:44,659 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 20:42:44,661 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 20:42:44,662 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 20:42:44,665 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 20:42:44,670 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 20:42:44,673 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 20:42:44,680 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 20:42:44,681 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 20:42:44,682 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 20:42:44,683 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 20:42:44,686 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 20:42:44,687 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 20:42:44,687 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 20:42:44,700 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 20:42:44,701 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 20:42:44,702 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 20:42:44,702 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 20:42:44,703 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 20:42:44,704 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 20:42:44,705 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 20:42:44,706 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 20:42:44,706 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 20:42:44,707 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 20:42:44,707 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 20:42:44,707 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 20:42:44,708 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 20:42:44,709 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 20:42:44,710 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-26 20:42:44,736 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 20:42:44,736 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 20:42:44,738 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 20:42:44,738 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 20:42:44,738 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 20:42:44,739 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 20:42:44,739 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 20:42:44,739 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 20:42:44,739 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 20:42:44,739 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 20:42:44,740 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 20:42:44,740 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 20:42:44,740 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 20:42:44,740 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 20:42:44,740 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 20:42:44,741 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 20:42:44,741 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 20:42:44,741 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 20:42:44,741 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 20:42:44,742 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 20:42:44,742 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 20:42:44,742 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 20:42:44,742 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 20:42:44,743 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 20:42:44,743 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 20:42:44,743 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 20:42:44,743 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 20:42:44,743 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 20:42:44,744 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 20:42:44,744 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 20:42:45,096 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 20:42:45,127 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 20:42:45,130 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 20:42:45,132 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 20:42:45,132 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 20:42:45,133 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label13.c [2020-10-26 20:42:45,215 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/da0e1c377/4beba17c020840e8919d9b5ff5e84e07/FLAG43b055fca [2020-10-26 20:42:46,152 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 20:42:46,154 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem03_label13.c [2020-10-26 20:42:46,177 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/da0e1c377/4beba17c020840e8919d9b5ff5e84e07/FLAG43b055fca [2020-10-26 20:42:46,315 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/da0e1c377/4beba17c020840e8919d9b5ff5e84e07 [2020-10-26 20:42:46,318 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 20:42:46,326 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 20:42:46,330 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 20:42:46,331 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 20:42:46,335 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 20:42:46,336 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 08:42:46" (1/1) ... [2020-10-26 20:42:46,341 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c27db08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:42:46, skipping insertion in model container [2020-10-26 20:42:46,341 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 08:42:46" (1/1) ... [2020-10-26 20:42:46,350 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 20:42:46,449 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 20:42:47,193 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 20:42:47,213 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 20:42:47,440 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 20:42:47,465 INFO L208 MainTranslator]: Completed translation [2020-10-26 20:42:47,466 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:42:47 WrapperNode [2020-10-26 20:42:47,466 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 20:42:47,468 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 20:42:47,468 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 20:42:47,468 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 20:42:47,483 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:42:47" (1/1) ... [2020-10-26 20:42:47,483 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:42:47" (1/1) ... [2020-10-26 20:42:47,522 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:42:47" (1/1) ... [2020-10-26 20:42:47,522 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:42:47" (1/1) ... [2020-10-26 20:42:47,613 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:42:47" (1/1) ... [2020-10-26 20:42:47,645 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:42:47" (1/1) ... [2020-10-26 20:42:47,672 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:42:47" (1/1) ... [2020-10-26 20:42:47,687 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 20:42:47,689 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 20:42:47,689 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 20:42:47,689 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 20:42:47,691 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:42:47" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 20:42:47,790 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 20:42:47,790 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 20:42:47,791 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 20:42:47,791 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-26 20:42:47,792 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 20:42:47,793 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-26 20:42:47,793 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 20:42:47,793 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 20:42:47,793 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 20:42:47,794 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 20:42:47,795 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 20:42:47,795 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-26 20:42:47,795 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 20:42:47,796 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 20:42:47,796 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 20:42:47,797 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 20:42:47,797 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 20:42:47,798 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 20:42:47,798 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 20:42:50,338 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 20:42:50,339 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-26 20:42:50,343 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 08:42:50 BoogieIcfgContainer [2020-10-26 20:42:50,343 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 20:42:50,348 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 20:42:50,348 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 20:42:50,352 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 20:42:50,352 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 08:42:46" (1/3) ... [2020-10-26 20:42:50,354 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24d19a93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 08:42:50, skipping insertion in model container [2020-10-26 20:42:50,354 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:42:47" (2/3) ... [2020-10-26 20:42:50,354 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24d19a93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 08:42:50, skipping insertion in model container [2020-10-26 20:42:50,354 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 08:42:50" (3/3) ... [2020-10-26 20:42:50,356 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label13.c [2020-10-26 20:42:50,370 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 20:42:50,377 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 20:42:50,393 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 20:42:50,438 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 20:42:50,438 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 20:42:50,438 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 20:42:50,438 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 20:42:50,439 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 20:42:50,439 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 20:42:50,439 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 20:42:50,439 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 20:42:50,478 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states. [2020-10-26 20:42:50,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-10-26 20:42:50,501 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:42:50,502 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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] [2020-10-26 20:42:50,502 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:42:50,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:42:50,511 INFO L82 PathProgramCache]: Analyzing trace with hash -2130077864, now seen corresponding path program 1 times [2020-10-26 20:42:50,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:42:50,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [59910843] [2020-10-26 20:42:50,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:42:50,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:42:51,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:51,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:54,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:42:54,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 172 [2020-10-26 20:42:54,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:42:54,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3376 [2020-10-26 20:42:54,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:42:54,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 20:42:54,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:42:54,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-10-26 20:42:54,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 20:42:55,648 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2020-10-26 20:42:55,821 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2020-10-26 20:42:55,984 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2020-10-26 20:42:56,427 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:42:56,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:42:56,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:42:56,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:56,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:42:56,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:42:56,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:42:56,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-10-26 20:42:56,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:42:56,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:42:56,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:42:56,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:42:56,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 20:42:57,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:42:57,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [59910843] [2020-10-26 20:42:57,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 20:42:57,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-26 20:42:57,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563093653] [2020-10-26 20:42:57,313 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 20:42:57,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:42:57,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 20:42:57,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-26 20:42:57,334 INFO L87 Difference]: Start difference. First operand 315 states. Second operand 12 states. [2020-10-26 20:42:57,926 WARN L193 SmtUtils]: Spent 445.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2020-10-26 20:42:58,948 WARN L193 SmtUtils]: Spent 929.00 ms on a formula simplification. DAG size of input: 199 DAG size of output: 196 [2020-10-26 20:43:00,049 WARN L193 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 199 DAG size of output: 196 [2020-10-26 20:43:01,164 WARN L193 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 212 DAG size of output: 204 [2020-10-26 20:43:02,885 WARN L193 SmtUtils]: Spent 1.59 s on a formula simplification. DAG size of input: 225 DAG size of output: 203 [2020-10-26 20:43:04,360 WARN L193 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 225 DAG size of output: 202 [2020-10-26 20:43:06,090 WARN L193 SmtUtils]: Spent 1.17 s on a formula simplification. DAG size of input: 228 DAG size of output: 201 [2020-10-26 20:43:10,067 WARN L193 SmtUtils]: Spent 1.61 s on a formula simplification. DAG size of input: 229 DAG size of output: 200 [2020-10-26 20:43:11,501 WARN L193 SmtUtils]: Spent 1.14 s on a formula simplification. DAG size of input: 231 DAG size of output: 198 [2020-10-26 20:43:14,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:43:14,555 INFO L93 Difference]: Finished difference Result 742 states and 1293 transitions. [2020-10-26 20:43:14,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 20:43:14,558 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 162 [2020-10-26 20:43:14,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:43:14,575 INFO L225 Difference]: With dead ends: 742 [2020-10-26 20:43:14,575 INFO L226 Difference]: Without dead ends: 365 [2020-10-26 20:43:14,583 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2020-10-26 20:43:14,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2020-10-26 20:43:14,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 365. [2020-10-26 20:43:14,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 365 states. [2020-10-26 20:43:14,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 526 transitions. [2020-10-26 20:43:14,664 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 526 transitions. Word has length 162 [2020-10-26 20:43:14,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:43:14,665 INFO L481 AbstractCegarLoop]: Abstraction has 365 states and 526 transitions. [2020-10-26 20:43:14,665 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 20:43:14,665 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 526 transitions. [2020-10-26 20:43:14,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-10-26 20:43:14,670 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:43:14,671 INFO L422 BasicCegarLoop]: trace histogram [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, 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, 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] [2020-10-26 20:43:14,671 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 20:43:14,671 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:43:14,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:43:14,672 INFO L82 PathProgramCache]: Analyzing trace with hash -560186619, now seen corresponding path program 1 times [2020-10-26 20:43:14,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:43:14,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1608402310] [2020-10-26 20:43:14,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:43:14,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:14,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:15,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:16,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:19,001 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:19,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 185 [2020-10-26 20:43:19,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:43:19,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4215 [2020-10-26 20:43:19,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:19,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:43:19,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:43:19,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 176 [2020-10-26 20:43:19,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 20:43:19,369 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:43:19,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:43:19,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:19,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:19,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:19,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:43:19,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:43:19,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-26 20:43:19,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:19,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:43:19,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:43:19,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:43:19,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:19,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:43:19,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:19,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:19,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:19,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:43:19,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:43:19,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-10-26 20:43:19,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:19,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:43:19,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:43:19,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:43:19,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:19,649 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-26 20:43:19,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1608402310] [2020-10-26 20:43:19,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:43:19,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 20:43:19,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32204802] [2020-10-26 20:43:19,653 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 20:43:19,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:43:19,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 20:43:19,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 20:43:19,658 INFO L87 Difference]: Start difference. First operand 365 states and 526 transitions. Second operand 6 states. [2020-10-26 20:43:19,904 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:43:23,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:43:23,171 INFO L93 Difference]: Finished difference Result 849 states and 1316 transitions. [2020-10-26 20:43:23,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 20:43:23,173 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 173 [2020-10-26 20:43:23,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:43:23,180 INFO L225 Difference]: With dead ends: 849 [2020-10-26 20:43:23,180 INFO L226 Difference]: Without dead ends: 605 [2020-10-26 20:43:23,182 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:43:23,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2020-10-26 20:43:23,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 599. [2020-10-26 20:43:23,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 599 states. [2020-10-26 20:43:23,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 860 transitions. [2020-10-26 20:43:23,230 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 860 transitions. Word has length 173 [2020-10-26 20:43:23,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:43:23,230 INFO L481 AbstractCegarLoop]: Abstraction has 599 states and 860 transitions. [2020-10-26 20:43:23,230 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 20:43:23,230 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 860 transitions. [2020-10-26 20:43:23,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2020-10-26 20:43:23,234 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:43:23,235 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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, 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, 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] [2020-10-26 20:43:23,235 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 20:43:23,235 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:43:23,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:43:23,236 INFO L82 PathProgramCache]: Analyzing trace with hash 235580476, now seen corresponding path program 1 times [2020-10-26 20:43:23,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:43:23,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [204887922] [2020-10-26 20:43:23,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:43:23,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:23,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:23,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:24,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:27,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:27,050 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 196 [2020-10-26 20:43:27,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:43:27,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3762 [2020-10-26 20:43:27,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:27,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:43:27,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:43:27,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-26 20:43:27,051 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:27,314 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:43:27,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:43:27,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:27,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:27,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:27,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:43:27,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:43:27,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-26 20:43:27,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:27,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:43:27,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:43:27,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:43:27,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:27,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:43:27,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:27,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:27,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:27,531 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:43:27,531 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:43:27,531 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 50 [2020-10-26 20:43:27,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:27,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:43:27,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:43:27,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:43:27,532 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:27,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 20:43:27,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:27,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:27,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:27,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-26 20:43:27,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:43:27,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-10-26 20:43:27,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:27,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:43:27,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:43:27,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-26 20:43:27,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:27,711 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 20:43:27,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [204887922] [2020-10-26 20:43:27,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:43:27,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:43:27,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58565388] [2020-10-26 20:43:27,715 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 20:43:27,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:43:27,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 20:43:27,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:43:27,722 INFO L87 Difference]: Start difference. First operand 599 states and 860 transitions. Second operand 8 states. [2020-10-26 20:43:27,974 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:43:32,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:43:32,113 INFO L93 Difference]: Finished difference Result 1582 states and 2368 transitions. [2020-10-26 20:43:32,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 20:43:32,115 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 182 [2020-10-26 20:43:32,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:43:32,124 INFO L225 Difference]: With dead ends: 1582 [2020-10-26 20:43:32,124 INFO L226 Difference]: Without dead ends: 1104 [2020-10-26 20:43:32,126 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2020-10-26 20:43:32,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1104 states. [2020-10-26 20:43:32,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1104 to 1085. [2020-10-26 20:43:32,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1085 states. [2020-10-26 20:43:32,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1085 states to 1085 states and 1602 transitions. [2020-10-26 20:43:32,191 INFO L78 Accepts]: Start accepts. Automaton has 1085 states and 1602 transitions. Word has length 182 [2020-10-26 20:43:32,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:43:32,192 INFO L481 AbstractCegarLoop]: Abstraction has 1085 states and 1602 transitions. [2020-10-26 20:43:32,192 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 20:43:32,192 INFO L276 IsEmpty]: Start isEmpty. Operand 1085 states and 1602 transitions. [2020-10-26 20:43:32,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2020-10-26 20:43:32,197 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:43:32,197 INFO L422 BasicCegarLoop]: trace histogram [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, 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, 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] [2020-10-26 20:43:32,198 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 20:43:32,198 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:43:32,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:43:32,198 INFO L82 PathProgramCache]: Analyzing trace with hash -1637773391, now seen corresponding path program 1 times [2020-10-26 20:43:32,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:43:32,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1676012872] [2020-10-26 20:43:32,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:43:32,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:32,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:32,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:34,067 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:34,068 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 195 [2020-10-26 20:43:34,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:43:34,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1772 [2020-10-26 20:43:34,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:34,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:43:34,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:43:34,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 186 [2020-10-26 20:43:34,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 20:43:34,590 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:43:34,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:43:34,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:34,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:34,636 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:34,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:43:34,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:43:34,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-26 20:43:34,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:34,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:43:34,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:43:34,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:43:34,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 20:43:34,782 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-26 20:43:34,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:43:34,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:34,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:34,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:34,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:34,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:43:34,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:43:34,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 109 [2020-10-26 20:43:34,910 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:34,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:43:34,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:43:34,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 20:43:34,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:35,061 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-26 20:43:35,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1676012872] [2020-10-26 20:43:35,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:43:35,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 20:43:35,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840634583] [2020-10-26 20:43:35,064 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 20:43:35,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:43:35,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 20:43:35,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-26 20:43:35,065 INFO L87 Difference]: Start difference. First operand 1085 states and 1602 transitions. Second operand 6 states. [2020-10-26 20:43:35,353 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:43:38,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:43:38,827 INFO L93 Difference]: Finished difference Result 2975 states and 4558 transitions. [2020-10-26 20:43:38,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 20:43:38,830 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 183 [2020-10-26 20:43:38,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:43:38,849 INFO L225 Difference]: With dead ends: 2975 [2020-10-26 20:43:38,850 INFO L226 Difference]: Without dead ends: 2011 [2020-10-26 20:43:38,853 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:43:38,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2011 states. [2020-10-26 20:43:38,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2011 to 1965. [2020-10-26 20:43:38,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1965 states. [2020-10-26 20:43:38,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1965 states to 1965 states and 2928 transitions. [2020-10-26 20:43:38,972 INFO L78 Accepts]: Start accepts. Automaton has 1965 states and 2928 transitions. Word has length 183 [2020-10-26 20:43:38,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:43:38,973 INFO L481 AbstractCegarLoop]: Abstraction has 1965 states and 2928 transitions. [2020-10-26 20:43:38,973 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 20:43:38,973 INFO L276 IsEmpty]: Start isEmpty. Operand 1965 states and 2928 transitions. [2020-10-26 20:43:38,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2020-10-26 20:43:38,980 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:43:38,980 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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, 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, 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] [2020-10-26 20:43:38,981 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 20:43:38,981 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:43:38,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:43:38,981 INFO L82 PathProgramCache]: Analyzing trace with hash 404416152, now seen corresponding path program 1 times [2020-10-26 20:43:38,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:43:38,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [653716714] [2020-10-26 20:43:38,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:43:39,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:39,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:39,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:40,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:43,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:43,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:43,893 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:43,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 205 [2020-10-26 20:43:43,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 20:43:43,894 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4855 [2020-10-26 20:43:43,894 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:43,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:43:43,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:43:43,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-26 20:43:43,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:44,179 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:43:44,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:43:44,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:44,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:44,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:44,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:43:44,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:43:44,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-26 20:43:44,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:44,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:43:44,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:43:44,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:43:44,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:44,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:43:44,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:44,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:44,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:44,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:43:44,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:43:44,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-10-26 20:43:44,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:44,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:43:44,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:43:44,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:43:44,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:44,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 20:43:44,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:44,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:44,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:44,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-26 20:43:44,461 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:43:44,461 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 67 [2020-10-26 20:43:44,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:44,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:43:44,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:43:44,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-26 20:43:44,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:44,530 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-26 20:43:44,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [653716714] [2020-10-26 20:43:44,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:43:44,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 20:43:44,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086877837] [2020-10-26 20:43:44,531 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:43:44,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:43:44,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:43:44,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:43:44,532 INFO L87 Difference]: Start difference. First operand 1965 states and 2928 transitions. Second operand 7 states. [2020-10-26 20:43:44,801 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:43:48,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:43:48,857 INFO L93 Difference]: Finished difference Result 5749 states and 8852 transitions. [2020-10-26 20:43:48,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 20:43:48,858 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 191 [2020-10-26 20:43:48,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:43:48,883 INFO L225 Difference]: With dead ends: 5749 [2020-10-26 20:43:48,883 INFO L226 Difference]: Without dead ends: 3905 [2020-10-26 20:43:48,890 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-10-26 20:43:48,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3905 states. [2020-10-26 20:43:49,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3905 to 3838. [2020-10-26 20:43:49,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3838 states. [2020-10-26 20:43:49,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3838 states to 3838 states and 5776 transitions. [2020-10-26 20:43:49,049 INFO L78 Accepts]: Start accepts. Automaton has 3838 states and 5776 transitions. Word has length 191 [2020-10-26 20:43:49,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:43:49,049 INFO L481 AbstractCegarLoop]: Abstraction has 3838 states and 5776 transitions. [2020-10-26 20:43:49,049 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:43:49,049 INFO L276 IsEmpty]: Start isEmpty. Operand 3838 states and 5776 transitions. [2020-10-26 20:43:49,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2020-10-26 20:43:49,060 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:43:49,060 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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, 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, 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] [2020-10-26 20:43:49,060 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 20:43:49,061 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:43:49,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:43:49,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1713651444, now seen corresponding path program 1 times [2020-10-26 20:43:49,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:43:49,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [921216691] [2020-10-26 20:43:49,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:43:49,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:49,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:49,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:50,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:50,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:50,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 208 [2020-10-26 20:43:50,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:43:50,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1679 [2020-10-26 20:43:50,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:50,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:43:50,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-26 20:43:50,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-26 20:43:50,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:51,126 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:43:51,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:43:51,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:51,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:51,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:51,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:43:51,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:43:51,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-26 20:43:51,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:51,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:43:51,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:43:51,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:43:51,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:51,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:43:51,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:51,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:51,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:51,302 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:43:51,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:43:51,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-26 20:43:51,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:51,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:43:51,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:43:51,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 20:43:51,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:51,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 20:43:51,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:51,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:51,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:51,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:43:51,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:43:51,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-10-26 20:43:51,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:51,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:43:51,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:43:51,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:43:51,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:51,462 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 34 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 20:43:51,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [921216691] [2020-10-26 20:43:51,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:43:51,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 20:43:51,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116733795] [2020-10-26 20:43:51,464 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 20:43:51,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:43:51,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 20:43:51,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:43:51,465 INFO L87 Difference]: Start difference. First operand 3838 states and 5776 transitions. Second operand 8 states. [2020-10-26 20:43:51,821 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:43:52,282 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:43:57,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:43:57,871 INFO L93 Difference]: Finished difference Result 13048 states and 21515 transitions. [2020-10-26 20:43:57,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 20:43:57,872 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 194 [2020-10-26 20:43:57,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:43:57,950 INFO L225 Difference]: With dead ends: 13048 [2020-10-26 20:43:57,950 INFO L226 Difference]: Without dead ends: 9331 [2020-10-26 20:43:57,968 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2020-10-26 20:43:57,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9331 states. [2020-10-26 20:43:58,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9331 to 9016. [2020-10-26 20:43:58,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9016 states. [2020-10-26 20:43:58,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9016 states to 9016 states and 13971 transitions. [2020-10-26 20:43:58,410 INFO L78 Accepts]: Start accepts. Automaton has 9016 states and 13971 transitions. Word has length 194 [2020-10-26 20:43:58,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:43:58,411 INFO L481 AbstractCegarLoop]: Abstraction has 9016 states and 13971 transitions. [2020-10-26 20:43:58,411 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 20:43:58,411 INFO L276 IsEmpty]: Start isEmpty. Operand 9016 states and 13971 transitions. [2020-10-26 20:43:58,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2020-10-26 20:43:58,437 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:43:58,437 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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, 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] [2020-10-26 20:43:58,438 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 20:43:58,438 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:43:58,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:43:58,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1515084032, now seen corresponding path program 1 times [2020-10-26 20:43:58,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:43:58,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [170030653] [2020-10-26 20:43:58,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:43:58,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:58,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:58,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:59,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:02,515 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:44:02,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 214 [2020-10-26 20:44:02,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:44:02,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4025 [2020-10-26 20:44:02,516 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:44:02,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:44:02,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:44:02,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-26 20:44:02,516 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:44:02,799 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:44:02,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:44:02,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:44:02,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:02,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:44:02,831 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:44:02,831 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:44:02,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-26 20:44:02,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:44:02,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:44:02,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:44:02,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:44:02,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:44:02,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:44:02,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:44:02,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:02,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:03,015 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:44:03,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:44:03,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:44:03,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 65 [2020-10-26 20:44:03,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:44:03,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:44:03,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:44:03,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 20:44:03,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:44:03,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 20:44:03,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:44:03,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:03,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:44:03,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-26 20:44:03,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:44:03,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-26 20:44:03,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:44:03,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:44:03,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:44:03,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 20:44:03,125 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:44:03,202 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 43 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 20:44:03,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [170030653] [2020-10-26 20:44:03,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:44:03,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:44:03,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273803610] [2020-10-26 20:44:03,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 20:44:03,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:44:03,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 20:44:03,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:44:03,204 INFO L87 Difference]: Start difference. First operand 9016 states and 13971 transitions. Second operand 8 states. [2020-10-26 20:44:03,489 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:44:05,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:44:05,691 INFO L93 Difference]: Finished difference Result 17791 states and 27850 transitions. [2020-10-26 20:44:05,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 20:44:05,692 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 200 [2020-10-26 20:44:05,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:44:05,741 INFO L225 Difference]: With dead ends: 17791 [2020-10-26 20:44:05,741 INFO L226 Difference]: Without dead ends: 8896 [2020-10-26 20:44:05,768 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-26 20:44:05,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8896 states. [2020-10-26 20:44:06,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8896 to 8896. [2020-10-26 20:44:06,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8896 states. [2020-10-26 20:44:06,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8896 states to 8896 states and 13371 transitions. [2020-10-26 20:44:06,075 INFO L78 Accepts]: Start accepts. Automaton has 8896 states and 13371 transitions. Word has length 200 [2020-10-26 20:44:06,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:44:06,075 INFO L481 AbstractCegarLoop]: Abstraction has 8896 states and 13371 transitions. [2020-10-26 20:44:06,075 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 20:44:06,075 INFO L276 IsEmpty]: Start isEmpty. Operand 8896 states and 13371 transitions. [2020-10-26 20:44:06,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2020-10-26 20:44:06,102 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:44:06,102 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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, 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, 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] [2020-10-26 20:44:06,102 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 20:44:06,103 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:44:06,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:44:06,103 INFO L82 PathProgramCache]: Analyzing trace with hash -426208544, now seen corresponding path program 1 times [2020-10-26 20:44:06,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:44:06,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [160531717] [2020-10-26 20:44:06,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:44:06,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:44:06,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:06,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:06,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:06,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:06,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:06,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:08,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:09,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:09,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:11,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:44:11,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 220 [2020-10-26 20:44:11,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-26 20:44:11,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-26 20:44:11,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:44:11,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:44:11,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:44:11,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 20:44:11,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:44:11,417 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:44:11,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:44:11,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:44:11,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:11,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:44:11,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:44:11,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:44:11,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-26 20:44:11,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:44:11,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:44:11,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:44:11,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:44:11,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:44:11,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:44:11,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:44:11,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:11,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:11,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:44:11,638 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:44:11,638 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:44:11,638 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 68 [2020-10-26 20:44:11,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:44:11,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:44:11,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:44:11,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-26 20:44:11,639 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:44:11,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 20:44:11,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:44:11,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:11,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:11,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:44:11,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-26 20:44:11,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:44:11,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-26 20:44:11,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:44:11,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:44:11,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-26 20:44:11,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:44:11,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:44:11,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-26 20:44:11,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:44:11,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:11,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:44:11,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:44:11,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:44:11,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-26 20:44:11,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:44:11,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:44:11,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 9 [2020-10-26 20:44:11,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:44:11,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:44:11,729 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 38 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-26 20:44:11,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [160531717] [2020-10-26 20:44:11,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:44:11,730 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 20:44:11,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949603805] [2020-10-26 20:44:11,730 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 20:44:11,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:44:11,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 20:44:11,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 20:44:11,732 INFO L87 Difference]: Start difference. First operand 8896 states and 13371 transitions. Second operand 5 states. [2020-10-26 20:44:11,991 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:44:13,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:44:13,688 INFO L93 Difference]: Finished difference Result 17667 states and 26626 transitions. [2020-10-26 20:44:13,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 20:44:13,689 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 204 [2020-10-26 20:44:13,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:44:13,729 INFO L225 Difference]: With dead ends: 17667 [2020-10-26 20:44:13,729 INFO L226 Difference]: Without dead ends: 8892 [2020-10-26 20:44:13,758 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-26 20:44:13,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8892 states. [2020-10-26 20:44:14,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8892 to 8892. [2020-10-26 20:44:14,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8892 states. [2020-10-26 20:44:14,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8892 states to 8892 states and 13363 transitions. [2020-10-26 20:44:14,054 INFO L78 Accepts]: Start accepts. Automaton has 8892 states and 13363 transitions. Word has length 204 [2020-10-26 20:44:14,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:44:14,054 INFO L481 AbstractCegarLoop]: Abstraction has 8892 states and 13363 transitions. [2020-10-26 20:44:14,055 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 20:44:14,055 INFO L276 IsEmpty]: Start isEmpty. Operand 8892 states and 13363 transitions. [2020-10-26 20:44:14,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2020-10-26 20:44:14,079 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:44:14,079 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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, 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] [2020-10-26 20:44:14,080 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 20:44:14,080 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:44:14,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:44:14,080 INFO L82 PathProgramCache]: Analyzing trace with hash -1144052716, now seen corresponding path program 1 times [2020-10-26 20:44:14,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:44:14,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [591139630] [2020-10-26 20:44:14,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:44:14,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:44:14,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:14,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:15,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:15,713 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:44:15,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 220 [2020-10-26 20:44:15,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:44:15,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1580 [2020-10-26 20:44:15,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:44:15,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:44:15,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-26 20:44:15,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-26 20:44:15,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:44:15,995 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:44:15,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:44:16,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:44:16,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:16,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:44:16,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:44:16,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:44:16,011 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-26 20:44:16,011 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:44:16,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:44:16,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:44:16,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:44:16,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:44:16,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:44:16,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:44:16,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:16,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:44:16,176 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:44:16,176 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:44:16,176 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-10-26 20:44:16,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:44:16,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:44:16,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:44:16,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 20:44:16,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 20:44:16,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 20:44:16,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:44:16,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:16,272 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:44:16,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-26 20:44:16,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:44:16,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 62 [2020-10-26 20:44:16,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:44:16,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:44:16,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:44:16,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-26 20:44:16,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:44:16,345 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 56 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 20:44:16,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [591139630] [2020-10-26 20:44:16,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:44:16,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 20:44:16,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006529380] [2020-10-26 20:44:16,347 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 20:44:16,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:44:16,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 20:44:16,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:44:16,348 INFO L87 Difference]: Start difference. First operand 8892 states and 13363 transitions. Second operand 8 states. [2020-10-26 20:44:16,634 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:44:17,158 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:44:18,701 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:44:22,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:44:22,397 INFO L93 Difference]: Finished difference Result 28195 states and 44802 transitions. [2020-10-26 20:44:22,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-26 20:44:22,397 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 206 [2020-10-26 20:44:22,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:44:22,484 INFO L225 Difference]: With dead ends: 28195 [2020-10-26 20:44:22,484 INFO L226 Difference]: Without dead ends: 19424 [2020-10-26 20:44:22,518 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-10-26 20:44:22,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19424 states. [2020-10-26 20:44:23,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19424 to 19256. [2020-10-26 20:44:23,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19256 states. [2020-10-26 20:44:23,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19256 states to 19256 states and 25717 transitions. [2020-10-26 20:44:23,162 INFO L78 Accepts]: Start accepts. Automaton has 19256 states and 25717 transitions. Word has length 206 [2020-10-26 20:44:23,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:44:23,163 INFO L481 AbstractCegarLoop]: Abstraction has 19256 states and 25717 transitions. [2020-10-26 20:44:23,163 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 20:44:23,163 INFO L276 IsEmpty]: Start isEmpty. Operand 19256 states and 25717 transitions. [2020-10-26 20:44:23,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2020-10-26 20:44:23,193 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:44:23,193 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 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, 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, 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] [2020-10-26 20:44:23,194 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 20:44:23,194 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:44:23,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:44:23,194 INFO L82 PathProgramCache]: Analyzing trace with hash 1829847784, now seen corresponding path program 1 times [2020-10-26 20:44:23,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:44:23,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1624558723] [2020-10-26 20:44:23,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:44:23,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:44:23,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:23,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:25,961 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:44:25,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 222 [2020-10-26 20:44:25,962 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:44:25,962 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2716 [2020-10-26 20:44:25,962 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:44:25,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 20:44:25,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:44:25,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-26 20:44:25,962 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:44:26,244 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:44:26,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:44:26,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:44:26,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:26,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:44:26,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:44:26,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:44:26,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-26 20:44:26,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:44:26,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:44:26,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:44:26,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:44:26,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:44:26,511 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-26 20:44:26,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:44:26,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:44:26,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:26,550 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:44:26,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:44:26,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:44:26,551 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-26 20:44:26,551 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:44:26,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 20:44:26,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:44:26,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:44:26,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:44:26,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 20:44:26,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:44:26,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:26,672 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:44:26,672 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-26 20:44:26,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:44:26,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 77 [2020-10-26 20:44:26,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:44:26,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:44:26,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:44:26,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 20:44:26,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:44:26,811 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 44 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 20:44:26,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1624558723] [2020-10-26 20:44:26,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:44:26,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-26 20:44:26,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304538699] [2020-10-26 20:44:26,813 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 20:44:26,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:44:26,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 20:44:26,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-26 20:44:26,814 INFO L87 Difference]: Start difference. First operand 19256 states and 25717 transitions. Second operand 10 states. [2020-10-26 20:44:27,100 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:44:27,516 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-26 20:44:30,132 WARN L193 SmtUtils]: Spent 447.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 160 [2020-10-26 20:44:34,050 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-26 20:44:35,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:44:35,734 INFO L93 Difference]: Finished difference Result 65133 states and 99677 transitions. [2020-10-26 20:44:35,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-26 20:44:35,734 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 208 [2020-10-26 20:44:35,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:44:36,004 INFO L225 Difference]: With dead ends: 65133 [2020-10-26 20:44:36,004 INFO L226 Difference]: Without dead ends: 45998 [2020-10-26 20:44:36,059 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=200, Invalid=612, Unknown=0, NotChecked=0, Total=812 [2020-10-26 20:44:36,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45998 states. [2020-10-26 20:44:37,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45998 to 40996. [2020-10-26 20:44:37,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40996 states. [2020-10-26 20:44:37,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40996 states to 40996 states and 55207 transitions. [2020-10-26 20:44:37,717 INFO L78 Accepts]: Start accepts. Automaton has 40996 states and 55207 transitions. Word has length 208 [2020-10-26 20:44:37,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:44:37,718 INFO L481 AbstractCegarLoop]: Abstraction has 40996 states and 55207 transitions. [2020-10-26 20:44:37,718 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 20:44:37,718 INFO L276 IsEmpty]: Start isEmpty. Operand 40996 states and 55207 transitions. [2020-10-26 20:44:37,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2020-10-26 20:44:37,751 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:44:37,751 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 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, 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, 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] [2020-10-26 20:44:37,751 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 20:44:37,751 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:44:37,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:44:37,752 INFO L82 PathProgramCache]: Analyzing trace with hash -1580682163, now seen corresponding path program 1 times [2020-10-26 20:44:37,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:44:37,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [44518917] [2020-10-26 20:44:37,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:44:37,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:44:37,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:38,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:40,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:42,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:44:42,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 232 [2020-10-26 20:44:42,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:44:42,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4678 [2020-10-26 20:44:42,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:44:42,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:44:42,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:44:42,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-26 20:44:42,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 20:44:42,795 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:44:42,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:44:42,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:44:42,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:42,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:44:42,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:44:42,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:44:42,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-26 20:44:42,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:44:42,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:44:42,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:44:42,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:44:42,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:44:42,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:44:42,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:44:42,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:42,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:44:42,993 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:44:42,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:44:42,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 56 [2020-10-26 20:44:42,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:44:42,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:44:42,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:44:42,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:44:42,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:44:43,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 20:44:43,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:44:43,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:43,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:44:43,237 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-26 20:44:43,238 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:44:43,238 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 163 [2020-10-26 20:44:43,238 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:44:43,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:44:43,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:44:43,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-26 20:44:43,239 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:44:43,423 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 51 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 20:44:43,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [44518917] [2020-10-26 20:44:43,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:44:43,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:44:43,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033603755] [2020-10-26 20:44:43,432 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 20:44:43,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:44:43,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 20:44:43,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:44:43,435 INFO L87 Difference]: Start difference. First operand 40996 states and 55207 transitions. Second operand 8 states. [2020-10-26 20:44:43,707 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:44:44,998 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-26 20:44:47,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:44:47,484 INFO L93 Difference]: Finished difference Result 84217 states and 119912 transitions. [2020-10-26 20:44:47,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 20:44:47,485 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 218 [2020-10-26 20:44:47,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:44:47,680 INFO L225 Difference]: With dead ends: 84217 [2020-10-26 20:44:47,680 INFO L226 Difference]: Without dead ends: 43342 [2020-10-26 20:44:47,759 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-10-26 20:44:47,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43342 states. [2020-10-26 20:44:49,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43342 to 42286. [2020-10-26 20:44:49,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42286 states. [2020-10-26 20:44:49,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42286 states to 42286 states and 56772 transitions. [2020-10-26 20:44:49,458 INFO L78 Accepts]: Start accepts. Automaton has 42286 states and 56772 transitions. Word has length 218 [2020-10-26 20:44:49,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:44:49,462 INFO L481 AbstractCegarLoop]: Abstraction has 42286 states and 56772 transitions. [2020-10-26 20:44:49,462 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 20:44:49,462 INFO L276 IsEmpty]: Start isEmpty. Operand 42286 states and 56772 transitions. [2020-10-26 20:44:49,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2020-10-26 20:44:49,525 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:44:49,525 INFO L422 BasicCegarLoop]: trace histogram [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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:44:49,525 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 20:44:49,526 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:44:49,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:44:49,527 INFO L82 PathProgramCache]: Analyzing trace with hash 351209249, now seen corresponding path program 1 times [2020-10-26 20:44:49,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:44:49,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1358710581] [2020-10-26 20:44:49,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:44:49,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:44:49,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:49,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:51,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:52,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:44:52,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 242 [2020-10-26 20:44:52,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:44:52,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3371 [2020-10-26 20:44:52,985 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:44:52,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:44:52,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:44:52,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-26 20:44:52,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:44:53,276 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:44:53,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:44:53,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:44:53,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:53,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:44:53,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:44:53,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:44:53,316 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-26 20:44:53,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:44:53,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:44:53,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:44:53,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:44:53,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:44:53,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:44:53,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:44:53,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:53,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:53,589 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:44:53,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:44:53,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:44:53,589 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 158 [2020-10-26 20:44:53,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:44:53,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:44:53,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:44:53,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 20:44:53,590 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:44:53,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 20:44:53,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:44:53,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:53,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:44:53,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-26 20:44:53,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:44:53,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 105 [2020-10-26 20:44:53,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:44:53,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:44:53,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:44:53,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-26 20:44:53,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:44:53,921 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 75 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 20:44:53,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1358710581] [2020-10-26 20:44:53,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:44:53,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:44:53,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223442132] [2020-10-26 20:44:53,922 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 20:44:53,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:44:53,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 20:44:53,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:44:53,923 INFO L87 Difference]: Start difference. First operand 42286 states and 56772 transitions. Second operand 8 states. [2020-10-26 20:44:54,201 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:44:55,921 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-26 20:44:58,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:44:58,594 INFO L93 Difference]: Finished difference Result 100275 states and 136330 transitions. [2020-10-26 20:44:58,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 20:44:58,595 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 228 [2020-10-26 20:44:58,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:44:59,056 INFO L225 Difference]: With dead ends: 100275 [2020-10-26 20:44:59,056 INFO L226 Difference]: Without dead ends: 59378 [2020-10-26 20:44:59,120 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-10-26 20:44:59,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59378 states. [2020-10-26 20:45:00,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59378 to 55761. [2020-10-26 20:45:00,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55761 states. [2020-10-26 20:45:01,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55761 states to 55761 states and 75425 transitions. [2020-10-26 20:45:01,344 INFO L78 Accepts]: Start accepts. Automaton has 55761 states and 75425 transitions. Word has length 228 [2020-10-26 20:45:01,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:45:01,344 INFO L481 AbstractCegarLoop]: Abstraction has 55761 states and 75425 transitions. [2020-10-26 20:45:01,344 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 20:45:01,344 INFO L276 IsEmpty]: Start isEmpty. Operand 55761 states and 75425 transitions. [2020-10-26 20:45:01,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2020-10-26 20:45:01,383 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:45:01,383 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:45:01,383 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 20:45:01,383 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:45:01,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:45:01,384 INFO L82 PathProgramCache]: Analyzing trace with hash -707825443, now seen corresponding path program 1 times [2020-10-26 20:45:01,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:45:01,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [488009945] [2020-10-26 20:45:01,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:45:01,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:45:01,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:01,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:04,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:06,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:45:06,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 266 [2020-10-26 20:45:06,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:45:06,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5032 [2020-10-26 20:45:06,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:45:06,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:45:06,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:45:06,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-26 20:45:06,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:45:06,759 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:45:06,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:45:06,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:45:06,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:06,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:45:06,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:45:06,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:45:06,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-26 20:45:06,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:45:06,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:45:06,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:45:06,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:45:06,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:45:06,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:45:06,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:45:06,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:06,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:45:06,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:45:06,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:45:06,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-26 20:45:06,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:45:06,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:45:06,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:45:06,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:45:06,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:45:06,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 20:45:06,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:45:06,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:07,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:45:07,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-26 20:45:07,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:45:07,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 93 [2020-10-26 20:45:07,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:45:07,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:45:07,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:45:07,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-26 20:45:07,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:45:07,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-26 20:45:07,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:45:07,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:07,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:45:07,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-26 20:45:07,217 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:45:07,217 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 101 [2020-10-26 20:45:07,217 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:45:07,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:45:07,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-26 20:45:07,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:45:07,218 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:45:07,291 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 84 proven. 35 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-26 20:45:07,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [488009945] [2020-10-26 20:45:07,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:45:07,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:45:07,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621608611] [2020-10-26 20:45:07,292 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:45:07,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:45:07,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:45:07,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:45:07,293 INFO L87 Difference]: Start difference. First operand 55761 states and 75425 transitions. Second operand 7 states. [2020-10-26 20:45:07,560 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:45:09,694 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-26 20:45:12,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:45:12,064 INFO L93 Difference]: Finished difference Result 142793 states and 194985 transitions. [2020-10-26 20:45:12,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 20:45:12,065 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 250 [2020-10-26 20:45:12,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:45:12,346 INFO L225 Difference]: With dead ends: 142793 [2020-10-26 20:45:12,347 INFO L226 Difference]: Without dead ends: 88630 [2020-10-26 20:45:12,444 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 20:45:12,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88630 states. [2020-10-26 20:45:14,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88630 to 88018. [2020-10-26 20:45:14,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88018 states. [2020-10-26 20:45:15,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88018 states to 88018 states and 117177 transitions. [2020-10-26 20:45:15,090 INFO L78 Accepts]: Start accepts. Automaton has 88018 states and 117177 transitions. Word has length 250 [2020-10-26 20:45:15,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:45:15,091 INFO L481 AbstractCegarLoop]: Abstraction has 88018 states and 117177 transitions. [2020-10-26 20:45:15,091 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:45:15,091 INFO L276 IsEmpty]: Start isEmpty. Operand 88018 states and 117177 transitions. [2020-10-26 20:45:15,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2020-10-26 20:45:15,118 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:45:15,119 INFO L422 BasicCegarLoop]: trace histogram [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, 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, 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] [2020-10-26 20:45:15,119 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 20:45:15,119 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:45:15,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:45:15,119 INFO L82 PathProgramCache]: Analyzing trace with hash 1554887006, now seen corresponding path program 1 times [2020-10-26 20:45:15,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:45:15,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [69104512] [2020-10-26 20:45:15,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:45:15,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:45:15,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:15,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:17,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:17,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:45:17,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 275 [2020-10-26 20:45:17,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:45:17,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2091 [2020-10-26 20:45:17,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:45:17,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:45:17,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-26 20:45:17,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-26 20:45:17,278 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:45:17,557 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:45:17,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:45:17,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:45:17,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:17,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:45:17,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:45:17,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:45:17,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 20:45:17,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:45:17,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:45:17,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:45:17,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:45:17,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:45:17,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:45:17,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:45:17,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:17,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:45:17,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:45:17,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:45:17,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-26 20:45:17,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:45:17,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:45:17,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:45:17,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 20:45:17,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:45:17,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 20:45:17,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:45:17,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:17,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:45:17,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-26 20:45:17,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:45:17,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 140 [2020-10-26 20:45:17,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:45:17,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:45:17,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:45:17,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-26 20:45:17,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:45:17,995 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 111 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 20:45:17,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [69104512] [2020-10-26 20:45:17,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:45:17,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:45:17,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110286760] [2020-10-26 20:45:17,996 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:45:17,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:45:17,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:45:17,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:45:17,997 INFO L87 Difference]: Start difference. First operand 88018 states and 117177 transitions. Second operand 7 states. [2020-10-26 20:45:18,351 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:45:18,717 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:45:24,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:45:24,816 INFO L93 Difference]: Finished difference Result 206397 states and 297685 transitions. [2020-10-26 20:45:24,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 20:45:24,816 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 261 [2020-10-26 20:45:24,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:45:25,406 INFO L225 Difference]: With dead ends: 206397 [2020-10-26 20:45:25,406 INFO L226 Difference]: Without dead ends: 118709 [2020-10-26 20:45:25,806 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 20:45:25,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118709 states. [2020-10-26 20:45:28,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118709 to 112668. [2020-10-26 20:45:28,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112668 states. [2020-10-26 20:45:28,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112668 states to 112668 states and 144993 transitions. [2020-10-26 20:45:28,782 INFO L78 Accepts]: Start accepts. Automaton has 112668 states and 144993 transitions. Word has length 261 [2020-10-26 20:45:28,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:45:28,783 INFO L481 AbstractCegarLoop]: Abstraction has 112668 states and 144993 transitions. [2020-10-26 20:45:28,783 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:45:28,783 INFO L276 IsEmpty]: Start isEmpty. Operand 112668 states and 144993 transitions. [2020-10-26 20:45:29,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2020-10-26 20:45:29,137 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:45:29,138 INFO L422 BasicCegarLoop]: trace histogram [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, 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, 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] [2020-10-26 20:45:29,138 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-26 20:45:29,138 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:45:29,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:45:29,138 INFO L82 PathProgramCache]: Analyzing trace with hash 1601595252, now seen corresponding path program 1 times [2020-10-26 20:45:29,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:45:29,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1942410885] [2020-10-26 20:45:29,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:45:29,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:45:29,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:29,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:30,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:30,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:34,201 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:45:34,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 286 [2020-10-26 20:45:34,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 20:45:34,202 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4969 [2020-10-26 20:45:34,202 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:45:34,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:45:34,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:45:34,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 118 [2020-10-26 20:45:34,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:45:34,492 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:45:34,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:45:34,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:45:34,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:34,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:45:34,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:45:34,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:45:34,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-26 20:45:34,516 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:45:34,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:45:34,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:45:34,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:45:34,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:45:34,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:45:34,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:45:34,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:34,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:45:34,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:45:34,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:45:34,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 92 [2020-10-26 20:45:34,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:45:34,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:45:34,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:45:34,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 20:45:34,731 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:45:34,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 20:45:34,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:45:34,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:34,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:45:34,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-26 20:45:34,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:45:34,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 155 [2020-10-26 20:45:34,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:45:34,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:45:34,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:45:34,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-26 20:45:34,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:45:35,160 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 119 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 20:45:35,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1942410885] [2020-10-26 20:45:35,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:45:35,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:45:35,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387962455] [2020-10-26 20:45:35,161 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 20:45:35,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:45:35,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 20:45:35,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:45:35,162 INFO L87 Difference]: Start difference. First operand 112668 states and 144993 transitions. Second operand 8 states. [2020-10-26 20:45:35,450 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:45:42,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:45:42,608 INFO L93 Difference]: Finished difference Result 331929 states and 445578 transitions. [2020-10-26 20:45:42,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 20:45:42,608 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 272 [2020-10-26 20:45:42,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:45:43,697 INFO L225 Difference]: With dead ends: 331929 [2020-10-26 20:45:43,697 INFO L226 Difference]: Without dead ends: 223250 [2020-10-26 20:45:43,815 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-26 20:45:43,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223250 states. [2020-10-26 20:45:48,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223250 to 220671. [2020-10-26 20:45:48,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220671 states. [2020-10-26 20:45:49,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220671 states to 220671 states and 285530 transitions. [2020-10-26 20:45:49,666 INFO L78 Accepts]: Start accepts. Automaton has 220671 states and 285530 transitions. Word has length 272 [2020-10-26 20:45:49,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:45:49,668 INFO L481 AbstractCegarLoop]: Abstraction has 220671 states and 285530 transitions. [2020-10-26 20:45:49,668 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 20:45:49,668 INFO L276 IsEmpty]: Start isEmpty. Operand 220671 states and 285530 transitions. [2020-10-26 20:45:49,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2020-10-26 20:45:49,721 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:45:49,721 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 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, 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, 1] [2020-10-26 20:45:49,722 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-26 20:45:49,722 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:45:49,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:45:49,722 INFO L82 PathProgramCache]: Analyzing trace with hash -160738207, now seen corresponding path program 1 times [2020-10-26 20:45:49,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:45:49,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [470343661] [2020-10-26 20:45:49,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:45:49,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:45:50,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:50,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:51,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:51,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:54,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:45:54,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 290 [2020-10-26 20:45:54,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 20:45:54,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-26 20:45:54,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:45:54,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 20:45:54,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:45:54,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 122 [2020-10-26 20:45:54,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:45:55,107 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:45:55,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:45:55,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:45:55,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:55,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:45:55,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:45:55,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:45:55,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-10-26 20:45:55,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:45:55,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:45:55,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:45:55,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:45:55,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:45:55,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:45:55,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:45:55,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:55,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:45:55,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:45:55,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:45:55,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-26 20:45:55,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:45:55,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:45:55,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:45:55,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:45:55,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:45:55,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 20:45:55,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:45:55,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:55,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:45:55,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-26 20:45:55,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:45:55,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-26 20:45:55,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:45:55,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:45:55,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:45:55,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-26 20:45:55,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:45:55,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-26 20:45:55,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:45:55,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:45:55,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:45:55,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-26 20:45:55,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:45:55,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 155 [2020-10-26 20:45:55,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:45:55,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:45:55,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:45:55,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-26 20:45:55,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:45:55,715 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 110 proven. 10 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-10-26 20:45:55,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [470343661] [2020-10-26 20:45:55,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:45:55,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:45:55,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883899614] [2020-10-26 20:45:55,716 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 20:45:55,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:45:55,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 20:45:55,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:45:55,717 INFO L87 Difference]: Start difference. First operand 220671 states and 285530 transitions. Second operand 8 states. [2020-10-26 20:45:55,977 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 160