/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 13:39:57,582 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 13:39:57,584 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 13:39:57,619 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 13:39:57,620 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 13:39:57,622 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 13:39:57,623 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 13:39:57,626 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 13:39:57,628 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 13:39:57,629 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 13:39:57,630 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 13:39:57,632 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 13:39:57,632 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 13:39:57,633 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 13:39:57,635 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 13:39:57,636 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 13:39:57,637 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 13:39:57,638 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 13:39:57,640 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 13:39:57,642 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 13:39:57,644 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 13:39:57,646 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 13:39:57,647 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 13:39:57,648 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 13:39:57,651 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 13:39:57,652 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 13:39:57,652 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 13:39:57,653 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 13:39:57,654 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 13:39:57,655 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 13:39:57,655 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 13:39:57,659 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 13:39:57,660 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 13:39:57,661 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 13:39:57,664 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 13:39:57,665 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 13:39:57,666 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 13:39:57,666 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 13:39:57,666 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 13:39:57,668 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 13:39:57,669 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 13:39:57,672 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-29 13:39:57,728 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 13:39:57,729 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 13:39:57,731 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 13:39:57,731 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 13:39:57,731 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 13:39:57,731 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 13:39:57,732 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 13:39:57,732 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 13:39:57,732 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 13:39:57,732 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 13:39:57,732 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 13:39:57,732 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 13:39:57,733 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 13:39:57,733 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 13:39:57,733 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 13:39:57,733 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 13:39:57,733 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 13:39:57,734 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 13:39:57,734 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 13:39:57,734 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 13:39:57,734 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 13:39:57,734 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 13:39:57,735 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 13:39:57,735 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 13:39:57,735 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 13:39:57,735 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 13:39:57,735 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 13:39:57,736 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 13:39:57,736 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 13:39:57,736 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 13:39:58,086 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 13:39:58,115 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 13:39:58,118 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 13:39:58,119 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 13:39:58,123 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 13:39:58,125 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-29 13:39:58,215 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/045f2a2fd/e5cdee98320a464c855b138c1c980bc5/FLAGcb08285eb [2020-10-29 13:39:58,880 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 13:39:58,881 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-29 13:39:58,895 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/045f2a2fd/e5cdee98320a464c855b138c1c980bc5/FLAGcb08285eb [2020-10-29 13:39:58,921 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/045f2a2fd/e5cdee98320a464c855b138c1c980bc5 [2020-10-29 13:39:58,925 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 13:39:58,934 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 13:39:58,936 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 13:39:58,936 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 13:39:58,940 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 13:39:58,941 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:39:58" (1/1) ... [2020-10-29 13:39:58,945 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73921678 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:39:58, skipping insertion in model container [2020-10-29 13:39:58,945 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:39:58" (1/1) ... [2020-10-29 13:39:58,954 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 13:39:59,012 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 13:39:59,254 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:39:59,284 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 13:39:59,339 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:39:59,363 INFO L208 MainTranslator]: Completed translation [2020-10-29 13:39:59,364 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:39:59 WrapperNode [2020-10-29 13:39:59,364 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 13:39:59,365 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 13:39:59,366 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 13:39:59,366 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 13:39:59,383 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:39:59" (1/1) ... [2020-10-29 13:39:59,383 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:39:59" (1/1) ... [2020-10-29 13:39:59,394 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:39:59" (1/1) ... [2020-10-29 13:39:59,394 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:39:59" (1/1) ... [2020-10-29 13:39:59,407 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:39:59" (1/1) ... [2020-10-29 13:39:59,418 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:39:59" (1/1) ... [2020-10-29 13:39:59,424 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:39:59" (1/1) ... [2020-10-29 13:39:59,431 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 13:39:59,435 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 13:39:59,435 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 13:39:59,435 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 13:39:59,436 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:39:59" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 13:39:59,531 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 13:39:59,532 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 13:39:59,532 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 13:39:59,533 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-29 13:39:59,534 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 13:39:59,534 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 13:39:59,534 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 13:39:59,535 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 13:39:59,535 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 13:39:59,535 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-29 13:39:59,536 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-29 13:39:59,537 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-29 13:39:59,537 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-29 13:39:59,537 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-29 13:39:59,537 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-29 13:39:59,539 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-29 13:39:59,539 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-29 13:39:59,539 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-29 13:39:59,539 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-29 13:39:59,540 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-29 13:39:59,540 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 13:39:59,540 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 13:39:59,541 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 13:39:59,541 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 13:39:59,541 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 13:39:59,541 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 13:39:59,542 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 13:40:00,373 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 13:40:00,373 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-29 13:40:00,375 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:40:00 BoogieIcfgContainer [2020-10-29 13:40:00,375 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 13:40:00,377 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 13:40:00,377 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 13:40:00,380 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 13:40:00,381 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 01:39:58" (1/3) ... [2020-10-29 13:40:00,381 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3164eb32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:40:00, skipping insertion in model container [2020-10-29 13:40:00,382 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:39:59" (2/3) ... [2020-10-29 13:40:00,382 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3164eb32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:40:00, skipping insertion in model container [2020-10-29 13:40:00,382 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:40:00" (3/3) ... [2020-10-29 13:40:00,384 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-29 13:40:00,395 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 13:40:00,400 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 13:40:00,413 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 13:40:00,439 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 13:40:00,439 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 13:40:00,439 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 13:40:00,440 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 13:40:00,440 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 13:40:00,440 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 13:40:00,440 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 13:40:00,440 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 13:40:00,459 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states. [2020-10-29 13:40:00,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-29 13:40:00,467 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:40:00,468 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] [2020-10-29 13:40:00,468 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:40:00,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:40:00,474 INFO L82 PathProgramCache]: Analyzing trace with hash 1066806879, now seen corresponding path program 1 times [2020-10-29 13:40:00,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:40:00,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1596681576] [2020-10-29 13:40:00,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:40:00,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:40:00,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:00,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:01,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:01,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:03,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:40:03,047 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-29 13:40:03,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 13:40:03,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2332 [2020-10-29 13:40:03,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:40:03,051 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:40:03,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:40:03,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 13:40:03,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-29 13:40:03,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 13:40:03,530 WARN L193 SmtUtils]: Spent 332.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-29 13:40:03,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:40:03,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:40:03,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:03,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:40:03,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:40:03,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:40:03,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-29 13:40:03,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:40:03,567 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:40:03,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:40:03,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:40:03,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:40:03,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:40:03,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:40:03,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1596681576] [2020-10-29 13:40:03,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:40:03,595 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:40:03,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53731473] [2020-10-29 13:40:03,601 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:40:03,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:40:03,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:40:03,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:40:03,626 INFO L87 Difference]: Start difference. First operand 94 states. Second operand 6 states. [2020-10-29 13:40:04,207 WARN L193 SmtUtils]: Spent 471.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-29 13:40:05,263 WARN L193 SmtUtils]: Spent 318.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-29 13:40:05,617 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-29 13:40:05,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:40:05,659 INFO L93 Difference]: Finished difference Result 362 states and 569 transitions. [2020-10-29 13:40:05,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 13:40:05,662 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 42 [2020-10-29 13:40:05,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:40:05,676 INFO L225 Difference]: With dead ends: 362 [2020-10-29 13:40:05,676 INFO L226 Difference]: Without dead ends: 276 [2020-10-29 13:40:05,680 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-29 13:40:05,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2020-10-29 13:40:05,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 147. [2020-10-29 13:40:05,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-29 13:40:05,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 218 transitions. [2020-10-29 13:40:05,751 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 218 transitions. Word has length 42 [2020-10-29 13:40:05,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:40:05,752 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 218 transitions. [2020-10-29 13:40:05,752 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:40:05,753 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 218 transitions. [2020-10-29 13:40:05,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-29 13:40:05,755 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:40:05,755 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] [2020-10-29 13:40:05,756 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 13:40:05,756 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:40:05,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:40:05,757 INFO L82 PathProgramCache]: Analyzing trace with hash -1863424726, now seen corresponding path program 1 times [2020-10-29 13:40:05,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:40:05,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1449796392] [2020-10-29 13:40:05,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:40:05,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:40:05,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:05,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:05,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:06,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:06,603 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:40:06,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-29 13:40:06,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 13:40:06,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 820 [2020-10-29 13:40:06,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:40:06,606 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:40:06,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:40:06,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-29 13:40:06,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-29 13:40:06,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-29 13:40:06,928 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-29 13:40:06,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:40:06,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:40:06,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:06,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:40:06,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:40:06,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:40:06,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 13:40:06,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:40:06,947 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:40:06,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:40:06,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:40:06,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:40:06,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:40:06,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:40:06,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1449796392] [2020-10-29 13:40:06,960 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:40:06,960 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:40:06,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711865791] [2020-10-29 13:40:06,962 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:40:06,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:40:06,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:40:06,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:40:06,963 INFO L87 Difference]: Start difference. First operand 147 states and 218 transitions. Second operand 4 states. [2020-10-29 13:40:07,318 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-29 13:40:08,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:40:08,042 INFO L93 Difference]: Finished difference Result 361 states and 554 transitions. [2020-10-29 13:40:08,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:40:08,046 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 43 [2020-10-29 13:40:08,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:40:08,049 INFO L225 Difference]: With dead ends: 361 [2020-10-29 13:40:08,050 INFO L226 Difference]: Without dead ends: 238 [2020-10-29 13:40:08,051 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:40:08,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-10-29 13:40:08,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 235. [2020-10-29 13:40:08,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2020-10-29 13:40:08,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 356 transitions. [2020-10-29 13:40:08,082 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 356 transitions. Word has length 43 [2020-10-29 13:40:08,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:40:08,083 INFO L481 AbstractCegarLoop]: Abstraction has 235 states and 356 transitions. [2020-10-29 13:40:08,083 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:40:08,083 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 356 transitions. [2020-10-29 13:40:08,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-29 13:40:08,085 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:40:08,085 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] [2020-10-29 13:40:08,085 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 13:40:08,086 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:40:08,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:40:08,086 INFO L82 PathProgramCache]: Analyzing trace with hash 1918500570, now seen corresponding path program 1 times [2020-10-29 13:40:08,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:40:08,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [810919053] [2020-10-29 13:40:08,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:40:08,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:40:08,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:08,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:08,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:08,533 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:40:08,534 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-29 13:40:08,534 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 13:40:08,534 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 423 [2020-10-29 13:40:08,534 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:40:08,535 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:40:08,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:40:08,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-29 13:40:08,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-29 13:40:08,535 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:40:08,859 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-29 13:40:08,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:40:08,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:40:08,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:08,875 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:40:08,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:40:08,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:40:08,876 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 13:40:08,876 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:40:08,876 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:40:08,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:40:08,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:40:08,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:40:08,877 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:40:08,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:40:08,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [810919053] [2020-10-29 13:40:08,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:40:08,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:40:08,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099108681] [2020-10-29 13:40:08,906 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:40:08,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:40:08,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:40:08,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:40:08,908 INFO L87 Difference]: Start difference. First operand 235 states and 356 transitions. Second operand 4 states. [2020-10-29 13:40:09,207 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-29 13:40:09,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:40:09,693 INFO L93 Difference]: Finished difference Result 593 states and 916 transitions. [2020-10-29 13:40:09,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:40:09,694 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 44 [2020-10-29 13:40:09,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:40:09,697 INFO L225 Difference]: With dead ends: 593 [2020-10-29 13:40:09,698 INFO L226 Difference]: Without dead ends: 382 [2020-10-29 13:40:09,703 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:40:09,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2020-10-29 13:40:09,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 379. [2020-10-29 13:40:09,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 379 states. [2020-10-29 13:40:09,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 578 transitions. [2020-10-29 13:40:09,789 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 578 transitions. Word has length 44 [2020-10-29 13:40:09,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:40:09,789 INFO L481 AbstractCegarLoop]: Abstraction has 379 states and 578 transitions. [2020-10-29 13:40:09,789 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:40:09,789 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 578 transitions. [2020-10-29 13:40:09,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-29 13:40:09,791 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:40:09,791 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] [2020-10-29 13:40:09,792 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 13:40:09,792 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:40:09,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:40:09,793 INFO L82 PathProgramCache]: Analyzing trace with hash -1236853102, now seen corresponding path program 1 times [2020-10-29 13:40:09,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:40:09,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1321852666] [2020-10-29 13:40:09,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:40:09,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:40:09,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:09,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:10,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:40:10,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-29 13:40:10,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 13:40:10,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 223 [2020-10-29 13:40:10,042 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:40:10,042 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:40:10,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:40:10,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-29 13:40:10,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-29 13:40:10,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:40:10,404 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-29 13:40:10,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:40:10,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:40:10,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:10,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:40:10,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:40:10,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:40:10,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 13:40:10,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:40:10,422 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:40:10,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:40:10,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:40:10,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:40:10,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:40:10,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:40:10,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1321852666] [2020-10-29 13:40:10,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:40:10,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:40:10,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188149485] [2020-10-29 13:40:10,437 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:40:10,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:40:10,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:40:10,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:40:10,438 INFO L87 Difference]: Start difference. First operand 379 states and 578 transitions. Second operand 4 states. [2020-10-29 13:40:10,746 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-29 13:40:11,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:40:11,280 INFO L93 Difference]: Finished difference Result 961 states and 1478 transitions. [2020-10-29 13:40:11,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:40:11,281 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 45 [2020-10-29 13:40:11,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:40:11,285 INFO L225 Difference]: With dead ends: 961 [2020-10-29 13:40:11,285 INFO L226 Difference]: Without dead ends: 606 [2020-10-29 13:40:11,287 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:40:11,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2020-10-29 13:40:11,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 603. [2020-10-29 13:40:11,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 603 states. [2020-10-29 13:40:11,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 914 transitions. [2020-10-29 13:40:11,330 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 914 transitions. Word has length 45 [2020-10-29 13:40:11,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:40:11,331 INFO L481 AbstractCegarLoop]: Abstraction has 603 states and 914 transitions. [2020-10-29 13:40:11,331 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:40:11,331 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 914 transitions. [2020-10-29 13:40:11,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-29 13:40:11,332 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:40:11,332 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] [2020-10-29 13:40:11,333 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 13:40:11,333 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:40:11,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:40:11,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1167890461, now seen corresponding path program 1 times [2020-10-29 13:40:11,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:40:11,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [539145388] [2020-10-29 13:40:11,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:40:11,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:40:11,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:11,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:11,724 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:40:11,724 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-29 13:40:11,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 13:40:11,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 352 [2020-10-29 13:40:11,725 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:40:11,725 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:40:11,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:40:11,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 13:40:11,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-29 13:40:11,726 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:40:12,084 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-29 13:40:12,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:40:12,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:40:12,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:12,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:40:12,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:40:12,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:40:12,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-29 13:40:12,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:40:12,111 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:40:12,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:40:12,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:40:12,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:40:12,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:40:12,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:40:12,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [539145388] [2020-10-29 13:40:12,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:40:12,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:40:12,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780667415] [2020-10-29 13:40:12,138 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:40:12,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:40:12,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:40:12,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:40:12,148 INFO L87 Difference]: Start difference. First operand 603 states and 914 transitions. Second operand 6 states. [2020-10-29 13:40:12,900 WARN L193 SmtUtils]: Spent 315.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-29 13:40:13,183 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-29 13:40:13,454 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-29 13:40:14,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:40:14,008 INFO L93 Difference]: Finished difference Result 2076 states and 3152 transitions. [2020-10-29 13:40:14,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 13:40:14,009 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 46 [2020-10-29 13:40:14,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:40:14,018 INFO L225 Difference]: With dead ends: 2076 [2020-10-29 13:40:14,018 INFO L226 Difference]: Without dead ends: 1497 [2020-10-29 13:40:14,020 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:40:14,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1497 states. [2020-10-29 13:40:14,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1497 to 1491. [2020-10-29 13:40:14,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1491 states. [2020-10-29 13:40:14,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1491 states to 1491 states and 2242 transitions. [2020-10-29 13:40:14,133 INFO L78 Accepts]: Start accepts. Automaton has 1491 states and 2242 transitions. Word has length 46 [2020-10-29 13:40:14,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:40:14,134 INFO L481 AbstractCegarLoop]: Abstraction has 1491 states and 2242 transitions. [2020-10-29 13:40:14,134 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:40:14,134 INFO L276 IsEmpty]: Start isEmpty. Operand 1491 states and 2242 transitions. [2020-10-29 13:40:14,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-29 13:40:14,135 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:40:14,136 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] [2020-10-29 13:40:14,136 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 13:40:14,136 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:40:14,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:40:14,137 INFO L82 PathProgramCache]: Analyzing trace with hash -254185062, now seen corresponding path program 1 times [2020-10-29 13:40:14,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:40:14,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [178661627] [2020-10-29 13:40:14,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:40:14,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:40:14,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:14,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:14,507 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:40:14,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-29 13:40:14,508 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 13:40:14,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 348 [2020-10-29 13:40:14,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:40:14,509 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:40:14,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:40:14,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:40:14,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-29 13:40:14,510 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:40:14,870 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-29 13:40:14,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:40:14,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:40:14,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:14,908 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:40:14,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:40:14,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:40:14,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-29 13:40:14,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:40:14,909 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:40:14,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:40:14,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:40:14,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:40:14,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:40:14,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:40:14,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [178661627] [2020-10-29 13:40:14,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:40:14,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:40:14,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160853208] [2020-10-29 13:40:14,929 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:40:14,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:40:14,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:40:14,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:40:14,930 INFO L87 Difference]: Start difference. First operand 1491 states and 2242 transitions. Second operand 6 states. [2020-10-29 13:40:15,275 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-29 13:40:16,218 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-29 13:40:16,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:40:16,396 INFO L93 Difference]: Finished difference Result 4385 states and 6598 transitions. [2020-10-29 13:40:16,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 13:40:16,397 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 48 [2020-10-29 13:40:16,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:40:16,413 INFO L225 Difference]: With dead ends: 4385 [2020-10-29 13:40:16,414 INFO L226 Difference]: Without dead ends: 2918 [2020-10-29 13:40:16,417 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:40:16,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2918 states. [2020-10-29 13:40:16,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2918 to 2915. [2020-10-29 13:40:16,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2915 states. [2020-10-29 13:40:16,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2915 states to 2915 states and 4338 transitions. [2020-10-29 13:40:16,643 INFO L78 Accepts]: Start accepts. Automaton has 2915 states and 4338 transitions. Word has length 48 [2020-10-29 13:40:16,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:40:16,643 INFO L481 AbstractCegarLoop]: Abstraction has 2915 states and 4338 transitions. [2020-10-29 13:40:16,643 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:40:16,643 INFO L276 IsEmpty]: Start isEmpty. Operand 2915 states and 4338 transitions. [2020-10-29 13:40:16,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-29 13:40:16,646 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:40:16,646 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] [2020-10-29 13:40:16,646 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 13:40:16,646 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:40:16,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:40:16,647 INFO L82 PathProgramCache]: Analyzing trace with hash 268846869, now seen corresponding path program 1 times [2020-10-29 13:40:16,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:40:16,648 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1762264521] [2020-10-29 13:40:16,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:40:16,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:40:16,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:16,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:40:16,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-29 13:40:16,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:40:16,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 128 [2020-10-29 13:40:16,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:40:16,802 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:40:16,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:40:16,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-29 13:40:16,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-29 13:40:16,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:40:17,250 WARN L193 SmtUtils]: Spent 351.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-29 13:40:17,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:40:17,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:40:17,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:17,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:40:17,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:40:17,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:40:17,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 13:40:17,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:40:17,264 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:40:17,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:40:17,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:40:17,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:40:17,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:40:17,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:40:17,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1762264521] [2020-10-29 13:40:17,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:40:17,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:40:17,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768545673] [2020-10-29 13:40:17,276 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:40:17,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:40:17,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:40:17,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:40:17,277 INFO L87 Difference]: Start difference. First operand 2915 states and 4338 transitions. Second operand 5 states. [2020-10-29 13:40:18,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:40:18,333 INFO L93 Difference]: Finished difference Result 5998 states and 8844 transitions. [2020-10-29 13:40:18,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 13:40:18,334 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 48 [2020-10-29 13:40:18,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:40:18,365 INFO L225 Difference]: With dead ends: 5998 [2020-10-29 13:40:18,366 INFO L226 Difference]: Without dead ends: 5995 [2020-10-29 13:40:18,368 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:40:18,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5995 states. [2020-10-29 13:40:18,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5995 to 3107. [2020-10-29 13:40:18,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3107 states. [2020-10-29 13:40:18,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3107 states to 3107 states and 4530 transitions. [2020-10-29 13:40:18,708 INFO L78 Accepts]: Start accepts. Automaton has 3107 states and 4530 transitions. Word has length 48 [2020-10-29 13:40:18,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:40:18,708 INFO L481 AbstractCegarLoop]: Abstraction has 3107 states and 4530 transitions. [2020-10-29 13:40:18,708 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:40:18,709 INFO L276 IsEmpty]: Start isEmpty. Operand 3107 states and 4530 transitions. [2020-10-29 13:40:18,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-29 13:40:18,710 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:40:18,711 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] [2020-10-29 13:40:18,712 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 13:40:18,712 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:40:18,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:40:18,712 INFO L82 PathProgramCache]: Analyzing trace with hash 42346085, now seen corresponding path program 1 times [2020-10-29 13:40:18,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:40:18,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1251970302] [2020-10-29 13:40:18,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:40:18,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:40:18,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:18,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:40:18,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-29 13:40:18,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:40:18,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 78 [2020-10-29 13:40:18,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:40:18,816 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:40:18,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:40:18,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 13:40:18,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-29 13:40:18,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:40:19,162 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-29 13:40:19,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:40:19,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:40:19,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:19,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:40:19,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:40:19,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:40:19,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-29 13:40:19,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:40:19,183 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:40:19,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:40:19,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:40:19,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:40:19,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:40:19,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:40:19,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1251970302] [2020-10-29 13:40:19,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:40:19,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:40:19,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062963899] [2020-10-29 13:40:19,198 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:40:19,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:40:19,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:40:19,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:40:19,201 INFO L87 Difference]: Start difference. First operand 3107 states and 4530 transitions. Second operand 4 states. [2020-10-29 13:40:19,523 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-29 13:40:20,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:40:20,294 INFO L93 Difference]: Finished difference Result 6863 states and 9992 transitions. [2020-10-29 13:40:20,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:40:20,295 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 49 [2020-10-29 13:40:20,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:40:20,316 INFO L225 Difference]: With dead ends: 6863 [2020-10-29 13:40:20,316 INFO L226 Difference]: Without dead ends: 3780 [2020-10-29 13:40:20,327 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:40:20,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3780 states. [2020-10-29 13:40:20,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3780 to 3777. [2020-10-29 13:40:20,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3777 states. [2020-10-29 13:40:20,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3777 states to 3777 states and 5464 transitions. [2020-10-29 13:40:20,697 INFO L78 Accepts]: Start accepts. Automaton has 3777 states and 5464 transitions. Word has length 49 [2020-10-29 13:40:20,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:40:20,699 INFO L481 AbstractCegarLoop]: Abstraction has 3777 states and 5464 transitions. [2020-10-29 13:40:20,699 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:40:20,699 INFO L276 IsEmpty]: Start isEmpty. Operand 3777 states and 5464 transitions. [2020-10-29 13:40:20,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-29 13:40:20,703 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:40:20,703 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-29 13:40:20,703 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 13:40:20,703 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:40:20,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:40:20,704 INFO L82 PathProgramCache]: Analyzing trace with hash -682566351, now seen corresponding path program 1 times [2020-10-29 13:40:20,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:40:20,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1330998168] [2020-10-29 13:40:20,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:40:20,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:40:20,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:20,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:20,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:22,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:40:22,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-29 13:40:22,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 13:40:22,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1894 [2020-10-29 13:40:22,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:40:22,627 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:40:22,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:40:22,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 13:40:22,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-29 13:40:22,627 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:40:22,967 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-29 13:40:22,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:40:22,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:40:22,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:22,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:40:22,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:40:22,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:40:22,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 13:40:22,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:40:22,983 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:40:22,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:40:22,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:40:22,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:40:22,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:40:23,008 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-29 13:40:23,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1330998168] [2020-10-29 13:40:23,009 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:40:23,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-29 13:40:23,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934914043] [2020-10-29 13:40:23,011 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:40:23,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:40:23,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:40:23,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:40:23,013 INFO L87 Difference]: Start difference. First operand 3777 states and 5464 transitions. Second operand 5 states. [2020-10-29 13:40:23,374 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-29 13:40:24,268 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-29 13:40:24,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:40:24,752 INFO L93 Difference]: Finished difference Result 9434 states and 13666 transitions. [2020-10-29 13:40:24,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 13:40:24,753 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 66 [2020-10-29 13:40:24,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:40:24,787 INFO L225 Difference]: With dead ends: 9434 [2020-10-29 13:40:24,787 INFO L226 Difference]: Without dead ends: 6351 [2020-10-29 13:40:24,796 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:40:24,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6351 states. [2020-10-29 13:40:25,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6351 to 6345. [2020-10-29 13:40:25,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6345 states. [2020-10-29 13:40:25,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6345 states to 6345 states and 9068 transitions. [2020-10-29 13:40:25,390 INFO L78 Accepts]: Start accepts. Automaton has 6345 states and 9068 transitions. Word has length 66 [2020-10-29 13:40:25,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:40:25,390 INFO L481 AbstractCegarLoop]: Abstraction has 6345 states and 9068 transitions. [2020-10-29 13:40:25,390 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:40:25,391 INFO L276 IsEmpty]: Start isEmpty. Operand 6345 states and 9068 transitions. [2020-10-29 13:40:25,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-29 13:40:25,393 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:40:25,394 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-29 13:40:25,394 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 13:40:25,394 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:40:25,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:40:25,395 INFO L82 PathProgramCache]: Analyzing trace with hash -32592006, now seen corresponding path program 1 times [2020-10-29 13:40:25,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:40:25,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [136827242] [2020-10-29 13:40:25,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:40:25,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:40:25,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:25,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:25,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:26,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:40:26,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-29 13:40:26,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 13:40:26,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1467 [2020-10-29 13:40:26,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:40:26,885 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:40:26,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:40:26,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 13:40:26,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-29 13:40:26,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:40:27,207 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-29 13:40:27,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:40:27,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:40:27,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:27,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:40:27,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:40:27,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:40:27,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 13:40:27,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:40:27,228 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:40:27,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:40:27,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:40:27,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:40:27,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:40:27,243 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-29 13:40:27,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [136827242] [2020-10-29 13:40:27,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:40:27,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-29 13:40:27,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397611376] [2020-10-29 13:40:27,245 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:40:27,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:40:27,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:40:27,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:40:27,246 INFO L87 Difference]: Start difference. First operand 6345 states and 9068 transitions. Second operand 6 states. [2020-10-29 13:40:27,601 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-29 13:40:28,603 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-29 13:40:29,502 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-29 13:40:29,836 WARN L193 SmtUtils]: Spent 311.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-10-29 13:40:30,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:40:30,080 INFO L93 Difference]: Finished difference Result 14895 states and 21569 transitions. [2020-10-29 13:40:30,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 13:40:30,081 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2020-10-29 13:40:30,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:40:30,120 INFO L225 Difference]: With dead ends: 14895 [2020-10-29 13:40:30,120 INFO L226 Difference]: Without dead ends: 11940 [2020-10-29 13:40:30,129 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-29 13:40:30,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11940 states. [2020-10-29 13:40:31,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11940 to 10407. [2020-10-29 13:40:31,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10407 states. [2020-10-29 13:40:31,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10407 states to 10407 states and 14880 transitions. [2020-10-29 13:40:31,103 INFO L78 Accepts]: Start accepts. Automaton has 10407 states and 14880 transitions. Word has length 67 [2020-10-29 13:40:31,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:40:31,103 INFO L481 AbstractCegarLoop]: Abstraction has 10407 states and 14880 transitions. [2020-10-29 13:40:31,104 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:40:31,104 INFO L276 IsEmpty]: Start isEmpty. Operand 10407 states and 14880 transitions. [2020-10-29 13:40:31,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-29 13:40:31,107 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:40:31,107 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-29 13:40:31,107 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 13:40:31,107 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:40:31,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:40:31,109 INFO L82 PathProgramCache]: Analyzing trace with hash 2055366417, now seen corresponding path program 1 times [2020-10-29 13:40:31,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:40:31,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [56031843] [2020-10-29 13:40:31,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:40:31,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:40:31,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:31,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:31,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:31,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:31,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:32,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:35,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:36,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:40:36,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-29 13:40:36,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 13:40:36,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-29 13:40:36,141 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:40:36,141 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:40:36,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:40:36,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 13:40:36,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-29 13:40:36,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:40:36,458 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-29 13:40:36,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:40:36,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:40:36,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:36,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:40:36,472 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:40:36,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:40:36,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 13:40:36,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:40:36,473 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:40:36,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:40:36,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:40:36,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:40:36,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:40:36,489 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-29 13:40:36,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [56031843] [2020-10-29 13:40:36,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:40:36,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-29 13:40:36,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787143923] [2020-10-29 13:40:36,490 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:40:36,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:40:36,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:40:36,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:40:36,491 INFO L87 Difference]: Start difference. First operand 10407 states and 14880 transitions. Second operand 6 states. [2020-10-29 13:40:36,864 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-29 13:40:37,705 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-29 13:40:38,533 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-29 13:40:38,869 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-10-29 13:40:39,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:40:39,033 INFO L93 Difference]: Finished difference Result 15809 states and 22596 transitions. [2020-10-29 13:40:39,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 13:40:39,034 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2020-10-29 13:40:39,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:40:39,064 INFO L225 Difference]: With dead ends: 15809 [2020-10-29 13:40:39,064 INFO L226 Difference]: Without dead ends: 13494 [2020-10-29 13:40:39,074 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-29 13:40:39,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13494 states. [2020-10-29 13:40:39,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13494 to 11605. [2020-10-29 13:40:39,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11605 states. [2020-10-29 13:40:39,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11605 states to 11605 states and 16580 transitions. [2020-10-29 13:40:39,949 INFO L78 Accepts]: Start accepts. Automaton has 11605 states and 16580 transitions. Word has length 67 [2020-10-29 13:40:39,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:40:39,949 INFO L481 AbstractCegarLoop]: Abstraction has 11605 states and 16580 transitions. [2020-10-29 13:40:39,950 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:40:39,950 INFO L276 IsEmpty]: Start isEmpty. Operand 11605 states and 16580 transitions. [2020-10-29 13:40:39,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-29 13:40:39,952 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:40:39,953 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-29 13:40:39,953 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 13:40:39,953 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:40:39,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:40:39,954 INFO L82 PathProgramCache]: Analyzing trace with hash -1445255943, now seen corresponding path program 1 times [2020-10-29 13:40:39,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:40:39,954 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [548126754] [2020-10-29 13:40:39,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:40:39,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:40:39,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:40,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:40,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:40,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:40,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:40,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:40,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:44,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:40:44,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-29 13:40:44,979 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 13:40:44,979 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-29 13:40:44,979 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:40:44,980 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:40:44,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:40:44,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-29 13:40:44,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-29 13:40:44,980 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:40:45,359 WARN L193 SmtUtils]: Spent 316.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-29 13:40:45,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:40:45,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:40:45,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:45,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:40:45,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:40:45,373 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:40:45,373 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 13:40:45,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:40:45,374 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:40:45,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:40:45,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:40:45,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:40:45,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:40:45,389 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-29 13:40:45,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [548126754] [2020-10-29 13:40:45,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:40:45,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-29 13:40:45,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80500999] [2020-10-29 13:40:45,390 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:40:45,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:40:45,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:40:45,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:40:45,391 INFO L87 Difference]: Start difference. First operand 11605 states and 16580 transitions. Second operand 6 states. [2020-10-29 13:40:45,756 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-29 13:40:46,760 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-29 13:40:47,555 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-29 13:40:47,872 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-10-29 13:40:48,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:40:48,136 INFO L93 Difference]: Finished difference Result 18700 states and 26793 transitions. [2020-10-29 13:40:48,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 13:40:48,137 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2020-10-29 13:40:48,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:40:48,163 INFO L225 Difference]: With dead ends: 18700 [2020-10-29 13:40:48,163 INFO L226 Difference]: Without dead ends: 15013 [2020-10-29 13:40:48,174 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-29 13:40:48,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15013 states. [2020-10-29 13:40:49,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15013 to 12617. [2020-10-29 13:40:49,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12617 states. [2020-10-29 13:40:49,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12617 states to 12617 states and 18000 transitions. [2020-10-29 13:40:49,049 INFO L78 Accepts]: Start accepts. Automaton has 12617 states and 18000 transitions. Word has length 67 [2020-10-29 13:40:49,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:40:49,049 INFO L481 AbstractCegarLoop]: Abstraction has 12617 states and 18000 transitions. [2020-10-29 13:40:49,049 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:40:49,050 INFO L276 IsEmpty]: Start isEmpty. Operand 12617 states and 18000 transitions. [2020-10-29 13:40:49,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-29 13:40:49,053 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:40:49,054 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-29 13:40:49,054 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 13:40:49,054 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:40:49,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:40:49,055 INFO L82 PathProgramCache]: Analyzing trace with hash -427338185, now seen corresponding path program 1 times [2020-10-29 13:40:49,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:40:49,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [364135499] [2020-10-29 13:40:49,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:40:49,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:40:49,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:49,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:49,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:49,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:49,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:54,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:40:54,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-29 13:40:54,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 13:40:54,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-29 13:40:54,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:40:54,077 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:40:54,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:40:54,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:40:54,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-29 13:40:54,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:40:54,551 WARN L193 SmtUtils]: Spent 359.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-29 13:40:54,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:40:54,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:40:54,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:54,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:40:54,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:40:54,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:40:54,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-29 13:40:54,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:40:54,585 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:40:54,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:40:54,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:40:54,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:40:54,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:40:54,627 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:40:54,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [364135499] [2020-10-29 13:40:54,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:40:54,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 13:40:54,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388902769] [2020-10-29 13:40:54,629 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:40:54,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:40:54,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:40:54,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:40:54,632 INFO L87 Difference]: Start difference. First operand 12617 states and 18000 transitions. Second operand 8 states. [2020-10-29 13:40:54,991 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-10-29 13:40:56,447 WARN L193 SmtUtils]: Spent 319.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-29 13:40:56,870 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-29 13:40:58,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:40:58,574 INFO L93 Difference]: Finished difference Result 42816 states and 60888 transitions. [2020-10-29 13:40:58,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 13:40:58,574 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 70 [2020-10-29 13:40:58,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:40:58,629 INFO L225 Difference]: With dead ends: 42816 [2020-10-29 13:40:58,629 INFO L226 Difference]: Without dead ends: 30225 [2020-10-29 13:40:58,663 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-29 13:40:58,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30225 states. [2020-10-29 13:41:00,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30225 to 16659. [2020-10-29 13:41:00,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16659 states. [2020-10-29 13:41:00,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16659 states to 16659 states and 23273 transitions. [2020-10-29 13:41:00,329 INFO L78 Accepts]: Start accepts. Automaton has 16659 states and 23273 transitions. Word has length 70 [2020-10-29 13:41:00,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:41:00,329 INFO L481 AbstractCegarLoop]: Abstraction has 16659 states and 23273 transitions. [2020-10-29 13:41:00,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:41:00,329 INFO L276 IsEmpty]: Start isEmpty. Operand 16659 states and 23273 transitions. [2020-10-29 13:41:00,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-29 13:41:00,334 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:41:00,335 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-29 13:41:00,335 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 13:41:00,335 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:41:00,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:41:00,336 INFO L82 PathProgramCache]: Analyzing trace with hash -802110271, now seen corresponding path program 1 times [2020-10-29 13:41:00,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:41:00,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [392021443] [2020-10-29 13:41:00,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:41:00,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:41:00,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:00,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:00,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:00,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:00,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:00,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:01,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:01,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:01,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:05,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:41:05,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-29 13:41:05,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 13:41:05,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-29 13:41:05,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:41:05,359 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:41:05,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:41:05,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:41:05,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-29 13:41:05,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:41:05,968 WARN L193 SmtUtils]: Spent 335.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-29 13:41:05,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:41:05,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:41:05,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:05,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:41:05,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:41:05,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:41:05,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-29 13:41:05,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:41:05,994 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:41:05,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:41:05,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:41:05,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:41:05,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:41:06,022 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:41:06,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [392021443] [2020-10-29 13:41:06,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:41:06,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 13:41:06,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480337072] [2020-10-29 13:41:06,023 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:41:06,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:41:06,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:41:06,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:41:06,029 INFO L87 Difference]: Start difference. First operand 16659 states and 23273 transitions. Second operand 8 states. [2020-10-29 13:41:06,354 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-29 13:41:07,731 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-29 13:41:08,129 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-29 13:41:09,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:41:09,731 INFO L93 Difference]: Finished difference Result 41709 states and 57868 transitions. [2020-10-29 13:41:09,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 13:41:09,731 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 70 [2020-10-29 13:41:09,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:41:09,779 INFO L225 Difference]: With dead ends: 41709 [2020-10-29 13:41:09,779 INFO L226 Difference]: Without dead ends: 25076 [2020-10-29 13:41:09,816 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-29 13:41:09,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25076 states. [2020-10-29 13:41:11,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25076 to 16764. [2020-10-29 13:41:11,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16764 states. [2020-10-29 13:41:11,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16764 states to 16764 states and 22892 transitions. [2020-10-29 13:41:11,316 INFO L78 Accepts]: Start accepts. Automaton has 16764 states and 22892 transitions. Word has length 70 [2020-10-29 13:41:11,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:41:11,316 INFO L481 AbstractCegarLoop]: Abstraction has 16764 states and 22892 transitions. [2020-10-29 13:41:11,316 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:41:11,316 INFO L276 IsEmpty]: Start isEmpty. Operand 16764 states and 22892 transitions. [2020-10-29 13:41:11,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-29 13:41:11,320 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:41:11,320 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-29 13:41:11,320 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-29 13:41:11,320 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:41:11,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:41:11,321 INFO L82 PathProgramCache]: Analyzing trace with hash 835046990, now seen corresponding path program 1 times [2020-10-29 13:41:11,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:41:11,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1446903607] [2020-10-29 13:41:11,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:41:11,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:41:11,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:11,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:11,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:11,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:11,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:11,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:11,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:11,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:12,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:12,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:12,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:12,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:13,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:16,340 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:41:16,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-29 13:41:16,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-29 13:41:16,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-29 13:41:16,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:41:16,341 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:41:16,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:41:16,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:41:16,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-29 13:41:16,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:41:16,739 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-29 13:41:16,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:41:16,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:41:16,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:16,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:41:16,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:41:16,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:41:16,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-29 13:41:16,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:41:16,765 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:41:16,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:41:16,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:41:16,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:41:16,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:41:16,783 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:41:16,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1446903607] [2020-10-29 13:41:16,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:41:16,788 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 13:41:16,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884070277] [2020-10-29 13:41:16,789 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:41:16,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:41:16,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:41:16,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:41:16,790 INFO L87 Difference]: Start difference. First operand 16764 states and 22892 transitions. Second operand 8 states. [2020-10-29 13:41:17,125 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-29 13:41:18,804 WARN L193 SmtUtils]: Spent 320.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2020-10-29 13:41:19,235 WARN L193 SmtUtils]: Spent 308.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-29 13:41:22,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:41:22,220 INFO L93 Difference]: Finished difference Result 47194 states and 64466 transitions. [2020-10-29 13:41:22,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 13:41:22,220 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 70 [2020-10-29 13:41:22,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:41:22,276 INFO L225 Difference]: With dead ends: 47194 [2020-10-29 13:41:22,276 INFO L226 Difference]: Without dead ends: 39620 [2020-10-29 13:41:22,301 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-10-29 13:41:22,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39620 states. [2020-10-29 13:41:24,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39620 to 22607. [2020-10-29 13:41:24,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22607 states. [2020-10-29 13:41:24,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22607 states to 22607 states and 31158 transitions. [2020-10-29 13:41:24,745 INFO L78 Accepts]: Start accepts. Automaton has 22607 states and 31158 transitions. Word has length 70 [2020-10-29 13:41:24,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:41:24,745 INFO L481 AbstractCegarLoop]: Abstraction has 22607 states and 31158 transitions. [2020-10-29 13:41:24,746 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:41:24,746 INFO L276 IsEmpty]: Start isEmpty. Operand 22607 states and 31158 transitions. [2020-10-29 13:41:24,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-29 13:41:24,751 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:41:24,751 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-29 13:41:24,752 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-29 13:41:24,752 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:41:24,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:41:24,752 INFO L82 PathProgramCache]: Analyzing trace with hash 636139392, now seen corresponding path program 1 times [2020-10-29 13:41:24,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:41:24,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2009507167] [2020-10-29 13:41:24,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:41:24,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:41:24,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:24,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:24,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:25,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:25,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:25,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:25,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:26,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:26,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:26,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:26,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:27,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:27,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:27,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:29,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:41:29,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-29 13:41:29,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-29 13:41:29,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-29 13:41:29,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:41:29,780 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:41:29,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:41:29,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:41:29,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-29 13:41:29,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:41:30,187 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-29 13:41:30,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:41:30,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:41:30,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:30,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:41:30,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:41:30,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:41:30,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-29 13:41:30,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:41:30,214 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:41:30,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:41:30,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:41:30,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:41:30,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:41:30,241 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:41:30,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2009507167] [2020-10-29 13:41:30,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:41:30,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 13:41:30,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492919055] [2020-10-29 13:41:30,243 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:41:30,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:41:30,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:41:30,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:41:30,244 INFO L87 Difference]: Start difference. First operand 22607 states and 31158 transitions. Second operand 9 states. [2020-10-29 13:41:30,610 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-29 13:41:32,954 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-29 13:41:33,544 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-29 13:41:40,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:41:40,837 INFO L93 Difference]: Finished difference Result 97355 states and 132671 transitions. [2020-10-29 13:41:40,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-29 13:41:40,838 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 72 [2020-10-29 13:41:40,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:41:40,928 INFO L225 Difference]: With dead ends: 97355 [2020-10-29 13:41:40,928 INFO L226 Difference]: Without dead ends: 77847 [2020-10-29 13:41:40,964 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=152, Invalid=448, Unknown=0, NotChecked=0, Total=600 [2020-10-29 13:41:41,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77847 states. [2020-10-29 13:41:44,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77847 to 25146. [2020-10-29 13:41:44,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25146 states. [2020-10-29 13:41:44,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25146 states to 25146 states and 34550 transitions. [2020-10-29 13:41:44,404 INFO L78 Accepts]: Start accepts. Automaton has 25146 states and 34550 transitions. Word has length 72 [2020-10-29 13:41:44,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:41:44,405 INFO L481 AbstractCegarLoop]: Abstraction has 25146 states and 34550 transitions. [2020-10-29 13:41:44,405 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 13:41:44,405 INFO L276 IsEmpty]: Start isEmpty. Operand 25146 states and 34550 transitions. [2020-10-29 13:41:44,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-29 13:41:44,411 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:41:44,412 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-29 13:41:44,412 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-29 13:41:44,412 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:41:44,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:41:44,412 INFO L82 PathProgramCache]: Analyzing trace with hash -1753602203, now seen corresponding path program 1 times [2020-10-29 13:41:44,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:41:44,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [731122922] [2020-10-29 13:41:44,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:41:44,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:41:44,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:44,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:44,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:45,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:45,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:48,248 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:41:48,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-29 13:41:48,249 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 13:41:48,249 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3815 [2020-10-29 13:41:48,249 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:41:48,249 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:41:48,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 13:41:48,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:41:48,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-29 13:41:48,250 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:41:48,861 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-29 13:41:48,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:41:48,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:41:48,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:48,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:41:48,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:41:48,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:41:48,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 13:41:48,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:41:48,875 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:41:48,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:41:48,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:41:48,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:41:48,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:41:48,893 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:41:48,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [731122922] [2020-10-29 13:41:48,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:41:48,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 13:41:48,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669528204] [2020-10-29 13:41:48,894 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 13:41:48,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:41:48,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 13:41:48,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-29 13:41:48,895 INFO L87 Difference]: Start difference. First operand 25146 states and 34550 transitions. Second operand 10 states. [2020-10-29 13:41:49,263 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-29 13:41:52,269 WARN L193 SmtUtils]: Spent 341.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-29 13:41:55,184 WARN L193 SmtUtils]: Spent 333.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-29 13:42:04,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:42:04,564 INFO L93 Difference]: Finished difference Result 115645 states and 157874 transitions. [2020-10-29 13:42:04,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-29 13:42:04,564 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 72 [2020-10-29 13:42:04,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:42:04,661 INFO L225 Difference]: With dead ends: 115645 [2020-10-29 13:42:04,661 INFO L226 Difference]: Without dead ends: 90525 [2020-10-29 13:42:04,688 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=194, Invalid=562, Unknown=0, NotChecked=0, Total=756 [2020-10-29 13:42:04,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90525 states. [2020-10-29 13:42:11,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90525 to 45095. [2020-10-29 13:42:11,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45095 states. [2020-10-29 13:42:11,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45095 states to 45095 states and 61816 transitions. [2020-10-29 13:42:11,102 INFO L78 Accepts]: Start accepts. Automaton has 45095 states and 61816 transitions. Word has length 72 [2020-10-29 13:42:11,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:42:11,102 INFO L481 AbstractCegarLoop]: Abstraction has 45095 states and 61816 transitions. [2020-10-29 13:42:11,102 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 13:42:11,102 INFO L276 IsEmpty]: Start isEmpty. Operand 45095 states and 61816 transitions. [2020-10-29 13:42:11,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-29 13:42:11,109 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:42:11,109 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-29 13:42:11,109 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-29 13:42:11,109 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:42:11,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:42:11,110 INFO L82 PathProgramCache]: Analyzing trace with hash -1476624200, now seen corresponding path program 1 times [2020-10-29 13:42:11,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:42:11,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2025241150] [2020-10-29 13:42:11,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:42:11,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:42:11,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:11,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:11,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:11,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:11,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:11,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:11,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:12,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:12,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:12,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:12,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:14,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:14,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:14,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:14,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:14,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:16,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:42:16,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-29 13:42:16,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-29 13:42:16,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-29 13:42:16,130 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:42:16,131 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:42:16,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:42:16,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:42:16,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-29 13:42:16,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:42:16,562 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-29 13:42:16,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:42:16,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:42:16,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:16,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:42:16,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:42:16,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:42:16,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 13:42:16,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:42:16,584 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:42:16,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:42:16,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:42:16,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:42:16,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:42:16,601 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:42:16,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2025241150] [2020-10-29 13:42:16,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:42:16,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 13:42:16,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679504600] [2020-10-29 13:42:16,602 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:42:16,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:42:16,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:42:16,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:42:16,603 INFO L87 Difference]: Start difference. First operand 45095 states and 61816 transitions. Second operand 9 states. [2020-10-29 13:42:16,952 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-29 13:42:18,967 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-29 13:42:19,503 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-29 13:42:30,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:42:30,647 INFO L93 Difference]: Finished difference Result 106998 states and 145394 transitions. [2020-10-29 13:42:30,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 13:42:30,648 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 72 [2020-10-29 13:42:30,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:42:30,738 INFO L225 Difference]: With dead ends: 106998 [2020-10-29 13:42:30,738 INFO L226 Difference]: Without dead ends: 87799 [2020-10-29 13:42:30,767 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=115, Invalid=305, Unknown=0, NotChecked=0, Total=420 [2020-10-29 13:42:30,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87799 states. [2020-10-29 13:42:38,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87799 to 47191. [2020-10-29 13:42:38,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47191 states. [2020-10-29 13:42:38,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47191 states to 47191 states and 64379 transitions. [2020-10-29 13:42:38,328 INFO L78 Accepts]: Start accepts. Automaton has 47191 states and 64379 transitions. Word has length 72 [2020-10-29 13:42:38,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:42:38,328 INFO L481 AbstractCegarLoop]: Abstraction has 47191 states and 64379 transitions. [2020-10-29 13:42:38,328 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 13:42:38,328 INFO L276 IsEmpty]: Start isEmpty. Operand 47191 states and 64379 transitions. [2020-10-29 13:42:38,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-29 13:42:38,334 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:42:38,334 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-29 13:42:38,334 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-29 13:42:38,335 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:42:38,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:42:38,335 INFO L82 PathProgramCache]: Analyzing trace with hash 42333619, now seen corresponding path program 1 times [2020-10-29 13:42:38,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:42:38,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2142107731] [2020-10-29 13:42:38,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:42:38,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:42:38,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:38,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:38,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:38,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:38,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:41,636 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:42:41,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-29 13:42:41,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 13:42:41,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3282 [2020-10-29 13:42:41,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:42:41,637 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:42:41,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 13:42:41,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:42:41,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-29 13:42:41,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:42:41,952 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 25 [2020-10-29 13:42:42,319 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-29 13:42:42,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:42:42,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:42:42,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:42,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:42:42,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:42:42,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:42:42,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 13:42:42,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:42:42,334 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:42:42,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:42:42,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:42:42,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:42:42,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:42:42,357 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:42:42,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2142107731] [2020-10-29 13:42:42,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:42:42,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 13:42:42,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333486862] [2020-10-29 13:42:42,358 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 13:42:42,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:42:42,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 13:42:42,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-29 13:42:42,359 INFO L87 Difference]: Start difference. First operand 47191 states and 64379 transitions. Second operand 10 states. [2020-10-29 13:42:42,760 WARN L193 SmtUtils]: Spent 326.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-29 13:42:47,288 WARN L193 SmtUtils]: Spent 348.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2020-10-29 13:42:52,631 WARN L193 SmtUtils]: Spent 359.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-29 13:42:57,687 WARN L193 SmtUtils]: Spent 417.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-29 13:43:22,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:43:22,656 INFO L93 Difference]: Finished difference Result 244463 states and 332187 transitions. [2020-10-29 13:43:22,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-29 13:43:22,657 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 72 [2020-10-29 13:43:22,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:43:23,108 INFO L225 Difference]: With dead ends: 244463 [2020-10-29 13:43:23,108 INFO L226 Difference]: Without dead ends: 201749 [2020-10-29 13:43:23,164 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=271, Invalid=851, Unknown=0, NotChecked=0, Total=1122 [2020-10-29 13:43:23,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201749 states.