/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.4.2.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 13:43:49,531 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 13:43:49,534 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 13:43:49,570 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 13:43:49,570 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 13:43:49,572 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 13:43:49,573 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 13:43:49,576 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 13:43:49,578 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 13:43:49,579 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 13:43:49,580 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 13:43:49,582 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 13:43:49,582 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 13:43:49,583 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 13:43:49,585 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 13:43:49,586 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 13:43:49,587 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 13:43:49,588 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 13:43:49,606 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 13:43:49,609 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 13:43:49,614 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 13:43:49,616 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 13:43:49,620 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 13:43:49,621 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 13:43:49,638 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 13:43:49,639 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 13:43:49,639 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 13:43:49,640 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 13:43:49,641 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 13:43:49,642 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 13:43:49,642 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 13:43:49,643 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 13:43:49,644 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 13:43:49,644 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 13:43:49,646 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 13:43:49,646 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 13:43:49,647 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 13:43:49,647 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 13:43:49,647 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 13:43:49,651 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 13:43:49,652 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 13:43:49,659 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 13:43:49,704 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 13:43:49,704 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 13:43:49,705 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 13:43:49,706 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 13:43:49,706 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 13:43:49,707 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 13:43:49,707 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 13:43:49,708 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 13:43:49,708 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 13:43:49,708 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 13:43:49,709 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 13:43:49,709 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 13:43:49,710 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 13:43:49,710 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 13:43:49,710 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 13:43:49,710 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 13:43:49,710 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 13:43:49,711 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 13:43:49,711 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 13:43:49,711 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 13:43:49,711 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 13:43:49,711 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 13:43:49,712 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 13:43:49,712 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 13:43:49,712 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 13:43:49,713 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 13:43:49,713 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 13:43:49,713 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 13:43:49,713 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 13:43:49,713 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 13:43:50,121 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 13:43:50,148 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 13:43:50,151 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 13:43:50,153 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 13:43:50,153 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 13:43:50,154 INFO L432 ainManager$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.4.2.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2020-10-29 13:43:50,241 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cd06bedd7/3e9e0b32616e4cc8aa6b8f9a26fc311c/FLAGb719b7318 [2020-10-29 13:43:50,889 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 13:43:50,890 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2020-10-29 13:43:50,902 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cd06bedd7/3e9e0b32616e4cc8aa6b8f9a26fc311c/FLAGb719b7318 [2020-10-29 13:43:51,149 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cd06bedd7/3e9e0b32616e4cc8aa6b8f9a26fc311c [2020-10-29 13:43:51,153 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 13:43:51,181 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 13:43:51,189 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 13:43:51,189 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 13:43:51,205 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 13:43:51,206 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:43:51" (1/1) ... [2020-10-29 13:43:51,211 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6818b210 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:43:51, skipping insertion in model container [2020-10-29 13:43:51,211 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:43:51" (1/1) ... [2020-10-29 13:43:51,221 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 13:43:51,293 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 13:43:51,619 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:43:51,639 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 13:43:51,753 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:43:51,803 INFO L208 MainTranslator]: Completed translation [2020-10-29 13:43:51,803 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:43:51 WrapperNode [2020-10-29 13:43:51,803 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 13:43:51,806 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 13:43:51,806 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 13:43:51,806 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 13:43:51,821 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:43:51" (1/1) ... [2020-10-29 13:43:51,822 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:43:51" (1/1) ... [2020-10-29 13:43:51,848 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:43:51" (1/1) ... [2020-10-29 13:43:51,851 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:43:51" (1/1) ... [2020-10-29 13:43:51,883 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:43:51" (1/1) ... [2020-10-29 13:43:51,897 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:43:51" (1/1) ... [2020-10-29 13:43:51,903 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:43:51" (1/1) ... [2020-10-29 13:43:51,912 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 13:43:51,917 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 13:43:51,917 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 13:43:51,917 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 13:43:51,918 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:43:51" (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 13:43:51,995 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 13:43:51,995 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 13:43:51,996 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 13:43:51,997 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-29 13:43:51,998 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 13:43:51,998 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 13:43:51,998 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 13:43:51,999 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 13:43:52,000 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 13:43:52,000 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-29 13:43:52,000 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-29 13:43:52,001 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-29 13:43:52,001 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-29 13:43:52,001 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-29 13:43:52,001 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-29 13:43:52,001 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-29 13:43:52,002 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-29 13:43:52,002 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-29 13:43:52,002 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-29 13:43:52,002 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-29 13:43:52,002 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-29 13:43:52,002 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 13:43:52,003 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 13:43:52,003 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 13:43:52,003 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 13:43:52,003 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 13:43:52,003 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 13:43:52,004 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 13:43:52,779 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 13:43:52,780 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-29 13:43:52,782 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:43:52 BoogieIcfgContainer [2020-10-29 13:43:52,783 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 13:43:52,785 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 13:43:52,785 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 13:43:52,789 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 13:43:52,790 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 01:43:51" (1/3) ... [2020-10-29 13:43:52,791 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@459d714d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:43:52, skipping insertion in model container [2020-10-29 13:43:52,791 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:43:51" (2/3) ... [2020-10-29 13:43:52,792 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@459d714d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:43:52, skipping insertion in model container [2020-10-29 13:43:52,792 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:43:52" (3/3) ... [2020-10-29 13:43:52,794 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2020-10-29 13:43:52,809 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 13:43:52,816 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 13:43:52,831 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 13:43:52,865 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 13:43:52,865 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 13:43:52,865 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 13:43:52,865 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 13:43:52,866 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 13:43:52,866 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 13:43:52,866 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 13:43:52,866 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 13:43:52,888 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states. [2020-10-29 13:43:52,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-29 13:43:52,898 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:43:52,899 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:43:52,900 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:43:52,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:43:52,907 INFO L82 PathProgramCache]: Analyzing trace with hash -1343942174, now seen corresponding path program 1 times [2020-10-29 13:43:52,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:43:52,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2045050060] [2020-10-29 13:43:52,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:43:53,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:43:53,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:53,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:53,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:53,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:54,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:58,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:43:58,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-29 13:43:58,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 13:43:58,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-29 13:43:58,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:43:58,235 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:43:58,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 13:43:58,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 13:43:58,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-29 13:43:58,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-29 13:43:58,646 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-29 13:43:58,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:43:58,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:43:58,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:58,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:43:58,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:43:58,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:43:58,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-29 13:43:58,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:43:58,674 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:43:58,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:43:58,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:43:58,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:43:58,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:43:58,704 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 13:43:58,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2045050060] [2020-10-29 13:43:58,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:43:58,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-29 13:43:58,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108905492] [2020-10-29 13:43:58,715 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 13:43:58,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:43:58,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 13:43:58,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:43:58,734 INFO L87 Difference]: Start difference. First operand 114 states. Second operand 7 states. [2020-10-29 13:43:59,109 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-29 13:44:00,124 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-29 13:44:00,311 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-29 13:44:00,510 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-29 13:44:00,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:44:00,555 INFO L93 Difference]: Finished difference Result 514 states and 814 transitions. [2020-10-29 13:44:00,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 13:44:00,557 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 53 [2020-10-29 13:44:00,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:44:00,575 INFO L225 Difference]: With dead ends: 514 [2020-10-29 13:44:00,575 INFO L226 Difference]: Without dead ends: 411 [2020-10-29 13:44:00,580 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-10-29 13:44:00,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2020-10-29 13:44:00,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 180. [2020-10-29 13:44:00,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-10-29 13:44:00,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 267 transitions. [2020-10-29 13:44:00,693 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 267 transitions. Word has length 53 [2020-10-29 13:44:00,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:44:00,694 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 267 transitions. [2020-10-29 13:44:00,694 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 13:44:00,695 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 267 transitions. [2020-10-29 13:44:00,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-29 13:44:00,706 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:44:00,707 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:44:00,707 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 13:44:00,707 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:44:00,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:44:00,708 INFO L82 PathProgramCache]: Analyzing trace with hash 712728976, now seen corresponding path program 1 times [2020-10-29 13:44:00,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:44:00,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [11711632] [2020-10-29 13:44:00,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:44:00,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:44:00,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:00,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:00,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:00,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:01,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:02,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:44:02,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-29 13:44:02,993 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 13:44:02,993 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2218 [2020-10-29 13:44:02,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:44:02,993 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:44:02,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:44:02,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-29 13:44:02,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-29 13:44:02,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:44:03,209 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-29 13:44:03,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:44:03,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:44:03,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:03,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:44:03,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:44:03,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:44:03,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-29 13:44:03,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:44:03,232 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:44:03,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:44:03,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:44:03,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:44:03,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:44:03,252 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 13:44:03,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [11711632] [2020-10-29 13:44:03,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:44:03,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:44:03,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502584209] [2020-10-29 13:44:03,255 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:44:03,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:44:03,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:44:03,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:44:03,256 INFO L87 Difference]: Start difference. First operand 180 states and 267 transitions. Second operand 4 states. [2020-10-29 13:44:03,466 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-29 13:44:04,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:44:04,004 INFO L93 Difference]: Finished difference Result 446 states and 687 transitions. [2020-10-29 13:44:04,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:44:04,005 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 54 [2020-10-29 13:44:04,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:44:04,008 INFO L225 Difference]: With dead ends: 446 [2020-10-29 13:44:04,009 INFO L226 Difference]: Without dead ends: 297 [2020-10-29 13:44:04,011 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:44:04,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2020-10-29 13:44:04,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 294. [2020-10-29 13:44:04,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2020-10-29 13:44:04,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 447 transitions. [2020-10-29 13:44:04,039 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 447 transitions. Word has length 54 [2020-10-29 13:44:04,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:44:04,039 INFO L481 AbstractCegarLoop]: Abstraction has 294 states and 447 transitions. [2020-10-29 13:44:04,040 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:44:04,040 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 447 transitions. [2020-10-29 13:44:04,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-29 13:44:04,041 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:44:04,042 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:44:04,042 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 13:44:04,042 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:44:04,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:44:04,043 INFO L82 PathProgramCache]: Analyzing trace with hash 702622460, now seen corresponding path program 1 times [2020-10-29 13:44:04,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:44:04,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [928404400] [2020-10-29 13:44:04,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:44:04,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:44:04,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:04,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:04,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:04,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:05,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:44:05,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-29 13:44:05,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 13:44:05,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1126 [2020-10-29 13:44:05,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:44:05,200 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:44:05,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:44:05,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-29 13:44:05,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-29 13:44:05,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:44:05,419 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-29 13:44:05,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:44:05,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:44:05,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:05,444 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:44:05,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:44:05,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:44:05,445 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-29 13:44:05,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:44:05,446 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:44:05,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:44:05,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:44:05,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:44:05,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:44:05,488 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 13:44:05,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [928404400] [2020-10-29 13:44:05,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:44:05,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:44:05,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087537398] [2020-10-29 13:44:05,491 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:44:05,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:44:05,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:44:05,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:44:05,493 INFO L87 Difference]: Start difference. First operand 294 states and 447 transitions. Second operand 4 states. [2020-10-29 13:44:05,683 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-29 13:44:06,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:44:06,306 INFO L93 Difference]: Finished difference Result 776 states and 1207 transitions. [2020-10-29 13:44:06,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:44:06,306 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 55 [2020-10-29 13:44:06,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:44:06,311 INFO L225 Difference]: With dead ends: 776 [2020-10-29 13:44:06,311 INFO L226 Difference]: Without dead ends: 513 [2020-10-29 13:44:06,318 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:44:06,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2020-10-29 13:44:06,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 510. [2020-10-29 13:44:06,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 510 states. [2020-10-29 13:44:06,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 785 transitions. [2020-10-29 13:44:06,379 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 785 transitions. Word has length 55 [2020-10-29 13:44:06,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:44:06,382 INFO L481 AbstractCegarLoop]: Abstraction has 510 states and 785 transitions. [2020-10-29 13:44:06,382 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:44:06,382 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 785 transitions. [2020-10-29 13:44:06,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-29 13:44:06,389 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:44:06,390 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:44:06,390 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 13:44:06,390 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:44:06,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:44:06,391 INFO L82 PathProgramCache]: Analyzing trace with hash 598056007, now seen corresponding path program 1 times [2020-10-29 13:44:06,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:44:06,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1632105488] [2020-10-29 13:44:06,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:44:06,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:44:06,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:06,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:06,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:07,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:44:07,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-29 13:44:07,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 13:44:07,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 588 [2020-10-29 13:44:07,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:44:07,024 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:44:07,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:44:07,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-29 13:44:07,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-29 13:44:07,025 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:44:07,211 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-29 13:44:07,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:44:07,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:44:07,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:07,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:44:07,236 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:44:07,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:44:07,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-29 13:44:07,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:44:07,236 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:44:07,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:44:07,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:44:07,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:44:07,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:44:07,253 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 13:44:07,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1632105488] [2020-10-29 13:44:07,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:44:07,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:44:07,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794687530] [2020-10-29 13:44:07,255 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:44:07,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:44:07,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:44:07,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:44:07,256 INFO L87 Difference]: Start difference. First operand 510 states and 785 transitions. Second operand 4 states. [2020-10-29 13:44:07,452 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-29 13:44:08,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:44:08,142 INFO L93 Difference]: Finished difference Result 1340 states and 2085 transitions. [2020-10-29 13:44:08,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:44:08,143 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 55 [2020-10-29 13:44:08,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:44:08,150 INFO L225 Difference]: With dead ends: 1340 [2020-10-29 13:44:08,150 INFO L226 Difference]: Without dead ends: 861 [2020-10-29 13:44:08,152 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:44:08,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861 states. [2020-10-29 13:44:08,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861 to 858. [2020-10-29 13:44:08,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 858 states. [2020-10-29 13:44:08,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 858 states to 858 states and 1321 transitions. [2020-10-29 13:44:08,221 INFO L78 Accepts]: Start accepts. Automaton has 858 states and 1321 transitions. Word has length 55 [2020-10-29 13:44:08,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:44:08,224 INFO L481 AbstractCegarLoop]: Abstraction has 858 states and 1321 transitions. [2020-10-29 13:44:08,224 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:44:08,224 INFO L276 IsEmpty]: Start isEmpty. Operand 858 states and 1321 transitions. [2020-10-29 13:44:08,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-29 13:44:08,226 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:44:08,226 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:44:08,226 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 13:44:08,227 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:44:08,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:44:08,227 INFO L82 PathProgramCache]: Analyzing trace with hash -2033325180, now seen corresponding path program 1 times [2020-10-29 13:44:08,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:44:08,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [769816350] [2020-10-29 13:44:08,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:44:08,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:44:08,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:08,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:08,515 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:44:08,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-29 13:44:08,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 13:44:08,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 257 [2020-10-29 13:44:08,516 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:44:08,516 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:44:08,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:44:08,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-29 13:44:08,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-29 13:44:08,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:44:08,719 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-29 13:44:08,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:44:08,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:44:08,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:08,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:44:08,739 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:44:08,739 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:44:08,739 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-29 13:44:08,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:44:08,740 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:44:08,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:44:08,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:44:08,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:44:08,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:44:08,760 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 13:44:08,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [769816350] [2020-10-29 13:44:08,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:44:08,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:44:08,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650769877] [2020-10-29 13:44:08,763 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:44:08,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:44:08,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:44:08,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:44:08,775 INFO L87 Difference]: Start difference. First operand 858 states and 1321 transitions. Second operand 4 states. [2020-10-29 13:44:08,962 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-29 13:44:09,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:44:09,609 INFO L93 Difference]: Finished difference Result 2256 states and 3485 transitions. [2020-10-29 13:44:09,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:44:09,610 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 56 [2020-10-29 13:44:09,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:44:09,619 INFO L225 Difference]: With dead ends: 2256 [2020-10-29 13:44:09,619 INFO L226 Difference]: Without dead ends: 1429 [2020-10-29 13:44:09,622 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:44:09,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1429 states. [2020-10-29 13:44:09,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1429 to 1426. [2020-10-29 13:44:09,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1426 states. [2020-10-29 13:44:09,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1426 states to 1426 states and 2177 transitions. [2020-10-29 13:44:09,713 INFO L78 Accepts]: Start accepts. Automaton has 1426 states and 2177 transitions. Word has length 56 [2020-10-29 13:44:09,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:44:09,713 INFO L481 AbstractCegarLoop]: Abstraction has 1426 states and 2177 transitions. [2020-10-29 13:44:09,713 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:44:09,714 INFO L276 IsEmpty]: Start isEmpty. Operand 1426 states and 2177 transitions. [2020-10-29 13:44:09,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-29 13:44:09,714 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:44:09,714 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:44:09,715 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 13:44:09,715 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:44:09,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:44:09,715 INFO L82 PathProgramCache]: Analyzing trace with hash 810563249, now seen corresponding path program 1 times [2020-10-29 13:44:09,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:44:09,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1000527818] [2020-10-29 13:44:09,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:44:09,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:44:09,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:09,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:10,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:44:10,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-29 13:44:10,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 13:44:10,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 481 [2020-10-29 13:44:10,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:44:10,228 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:44:10,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 13:44:10,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 13:44:10,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-29 13:44:10,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:44:10,469 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-29 13:44:10,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:44:10,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:44:10,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:10,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:44:10,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:44:10,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:44:10,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-29 13:44:10,487 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:44:10,487 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:44:10,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:44:10,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:44:10,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:44:10,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:44:10,516 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 13:44:10,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1000527818] [2020-10-29 13:44:10,517 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:44:10,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-29 13:44:10,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189005556] [2020-10-29 13:44:10,518 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 13:44:10,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:44:10,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 13:44:10,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:44:10,519 INFO L87 Difference]: Start difference. First operand 1426 states and 2177 transitions. Second operand 7 states. [2020-10-29 13:44:11,133 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-29 13:44:11,306 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-29 13:44:11,474 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-29 13:44:11,668 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-29 13:44:12,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:44:12,584 INFO L93 Difference]: Finished difference Result 6190 states and 9417 transitions. [2020-10-29 13:44:12,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 13:44:12,584 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 57 [2020-10-29 13:44:12,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:44:12,618 INFO L225 Difference]: With dead ends: 6190 [2020-10-29 13:44:12,618 INFO L226 Difference]: Without dead ends: 4795 [2020-10-29 13:44:12,624 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2020-10-29 13:44:12,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4795 states. [2020-10-29 13:44:12,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4795 to 4786. [2020-10-29 13:44:12,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4786 states. [2020-10-29 13:44:13,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4786 states to 4786 states and 7233 transitions. [2020-10-29 13:44:13,003 INFO L78 Accepts]: Start accepts. Automaton has 4786 states and 7233 transitions. Word has length 57 [2020-10-29 13:44:13,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:44:13,004 INFO L481 AbstractCegarLoop]: Abstraction has 4786 states and 7233 transitions. [2020-10-29 13:44:13,004 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 13:44:13,004 INFO L276 IsEmpty]: Start isEmpty. Operand 4786 states and 7233 transitions. [2020-10-29 13:44:13,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-29 13:44:13,005 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:44:13,005 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:44:13,005 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 13:44:13,005 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:44:13,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:44:13,006 INFO L82 PathProgramCache]: Analyzing trace with hash -1631865336, now seen corresponding path program 1 times [2020-10-29 13:44:13,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:44:13,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1422014642] [2020-10-29 13:44:13,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:44:13,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:44:13,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:13,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:13,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:44:13,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-29 13:44:13,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 13:44:13,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 512 [2020-10-29 13:44:13,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:44:13,547 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:44:13,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:44:13,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:44:13,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-29 13:44:13,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:44:13,804 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-29 13:44:13,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:44:13,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:44:13,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:13,848 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:44:13,848 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:44:13,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:44:13,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-29 13:44:13,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:44:13,849 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:44:13,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:44:13,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:44:13,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:44:13,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:44:13,872 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 13:44:13,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1422014642] [2020-10-29 13:44:13,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:44:13,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:44:13,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057821924] [2020-10-29 13:44:13,873 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:44:13,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:44:13,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:44:13,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:44:13,874 INFO L87 Difference]: Start difference. First operand 4786 states and 7233 transitions. Second operand 6 states. [2020-10-29 13:44:14,083 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-29 13:44:14,936 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-29 13:44:15,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:44:15,444 INFO L93 Difference]: Finished difference Result 14200 states and 21445 transitions. [2020-10-29 13:44:15,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 13:44:15,444 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 59 [2020-10-29 13:44:15,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:44:15,496 INFO L225 Difference]: With dead ends: 14200 [2020-10-29 13:44:15,496 INFO L226 Difference]: Without dead ends: 9445 [2020-10-29 13:44:15,510 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:44:15,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9445 states. [2020-10-29 13:44:16,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9445 to 9442. [2020-10-29 13:44:16,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9442 states. [2020-10-29 13:44:16,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9442 states to 9442 states and 14145 transitions. [2020-10-29 13:44:16,254 INFO L78 Accepts]: Start accepts. Automaton has 9442 states and 14145 transitions. Word has length 59 [2020-10-29 13:44:16,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:44:16,255 INFO L481 AbstractCegarLoop]: Abstraction has 9442 states and 14145 transitions. [2020-10-29 13:44:16,255 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:44:16,255 INFO L276 IsEmpty]: Start isEmpty. Operand 9442 states and 14145 transitions. [2020-10-29 13:44:16,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-29 13:44:16,256 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:44:16,256 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:44:16,256 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 13:44:16,256 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:44:16,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:44:16,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1108833405, now seen corresponding path program 1 times [2020-10-29 13:44:16,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:44:16,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [502762907] [2020-10-29 13:44:16,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:44:16,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:44:16,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:16,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:44:16,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-29 13:44:16,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:44:16,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 261 [2020-10-29 13:44:16,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:44:16,548 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:44:16,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:44:16,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 60 [2020-10-29 13:44:16,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-29 13:44:16,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:44:16,785 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-29 13:44:16,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:44:16,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:44:16,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:16,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:44:16,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:44:16,817 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:44:16,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-29 13:44:16,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:44:16,817 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:44:16,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:44:16,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:44:16,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:44:16,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:44:16,836 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 13:44:16,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [502762907] [2020-10-29 13:44:16,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:44:16,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:44:16,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287737536] [2020-10-29 13:44:16,837 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:44:16,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:44:16,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:44:16,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:44:16,839 INFO L87 Difference]: Start difference. First operand 9442 states and 14145 transitions. Second operand 5 states. [2020-10-29 13:44:18,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:44:18,711 INFO L93 Difference]: Finished difference Result 19365 states and 28771 transitions. [2020-10-29 13:44:18,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 13:44:18,712 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 59 [2020-10-29 13:44:18,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:44:18,789 INFO L225 Difference]: With dead ends: 19365 [2020-10-29 13:44:18,790 INFO L226 Difference]: Without dead ends: 19362 [2020-10-29 13:44:18,799 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:44:18,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19362 states. [2020-10-29 13:44:19,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19362 to 9954. [2020-10-29 13:44:19,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9954 states. [2020-10-29 13:44:19,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9954 states to 9954 states and 14657 transitions. [2020-10-29 13:44:19,861 INFO L78 Accepts]: Start accepts. Automaton has 9954 states and 14657 transitions. Word has length 59 [2020-10-29 13:44:19,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:44:19,862 INFO L481 AbstractCegarLoop]: Abstraction has 9954 states and 14657 transitions. [2020-10-29 13:44:19,862 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:44:19,862 INFO L276 IsEmpty]: Start isEmpty. Operand 9954 states and 14657 transitions. [2020-10-29 13:44:19,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-29 13:44:19,863 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:44:19,863 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:44:19,863 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 13:44:19,864 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:44:19,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:44:19,864 INFO L82 PathProgramCache]: Analyzing trace with hash 283893568, now seen corresponding path program 1 times [2020-10-29 13:44:19,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:44:19,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [144326231] [2020-10-29 13:44:19,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:44:19,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:44:19,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:20,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:44:20,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-29 13:44:20,041 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:44:20,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 113 [2020-10-29 13:44:20,042 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:44:20,042 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:44:20,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:44:20,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 13:44:20,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-29 13:44:20,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:44:20,229 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-29 13:44:20,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:44:20,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:44:20,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:20,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:44:20,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:44:20,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:44:20,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-29 13:44:20,254 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:44:20,254 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:44:20,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:44:20,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:44:20,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:44:20,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:44:20,271 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 13:44:20,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [144326231] [2020-10-29 13:44:20,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:44:20,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:44:20,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105541357] [2020-10-29 13:44:20,273 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:44:20,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:44:20,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:44:20,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:44:20,274 INFO L87 Difference]: Start difference. First operand 9954 states and 14657 transitions. Second operand 4 states. [2020-10-29 13:44:20,466 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-29 13:44:22,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:44:22,006 INFO L93 Difference]: Finished difference Result 24078 states and 35435 transitions. [2020-10-29 13:44:22,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:44:22,007 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 60 [2020-10-29 13:44:22,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:44:22,051 INFO L225 Difference]: With dead ends: 24078 [2020-10-29 13:44:22,051 INFO L226 Difference]: Without dead ends: 14155 [2020-10-29 13:44:22,078 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:44:22,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14155 states. [2020-10-29 13:44:23,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14155 to 14152. [2020-10-29 13:44:23,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14152 states. [2020-10-29 13:44:23,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14152 states to 14152 states and 20695 transitions. [2020-10-29 13:44:23,116 INFO L78 Accepts]: Start accepts. Automaton has 14152 states and 20695 transitions. Word has length 60 [2020-10-29 13:44:23,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:44:23,116 INFO L481 AbstractCegarLoop]: Abstraction has 14152 states and 20695 transitions. [2020-10-29 13:44:23,116 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:44:23,116 INFO L276 IsEmpty]: Start isEmpty. Operand 14152 states and 20695 transitions. [2020-10-29 13:44:23,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-29 13:44:23,124 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:44:23,124 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:44:23,125 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 13:44:23,125 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:44:23,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:44:23,126 INFO L82 PathProgramCache]: Analyzing trace with hash 324065327, now seen corresponding path program 1 times [2020-10-29 13:44:23,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:44:23,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1827194526] [2020-10-29 13:44:23,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:44:23,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:44:23,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:23,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:23,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:24,729 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:44:24,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-29 13:44:24,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 13:44:24,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1569 [2020-10-29 13:44:24,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:44:24,730 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:44:24,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:44:24,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 13:44:24,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-29 13:44:24,731 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:44:24,985 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-29 13:44:24,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:44:24,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:44:24,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:25,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:44:25,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:44:25,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:44:25,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 13:44:25,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:44:25,003 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:44:25,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:44:25,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:44:25,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:44:25,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:44:25,037 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-29 13:44:25,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1827194526] [2020-10-29 13:44:25,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:44:25,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-29 13:44:25,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381623158] [2020-10-29 13:44:25,039 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:44:25,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:44:25,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:44:25,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:44:25,040 INFO L87 Difference]: Start difference. First operand 14152 states and 20695 transitions. Second operand 5 states. [2020-10-29 13:44:25,236 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-29 13:44:26,197 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-29 13:44:27,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:44:27,481 INFO L93 Difference]: Finished difference Result 33425 states and 49053 transitions. [2020-10-29 13:44:27,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 13:44:27,482 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 81 [2020-10-29 13:44:27,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:44:27,541 INFO L225 Difference]: With dead ends: 33425 [2020-10-29 13:44:27,542 INFO L226 Difference]: Without dead ends: 23502 [2020-10-29 13:44:27,571 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:44:27,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23502 states. [2020-10-29 13:44:29,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23502 to 23496. [2020-10-29 13:44:29,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23496 states. [2020-10-29 13:44:29,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23496 states to 23496 states and 34167 transitions. [2020-10-29 13:44:29,367 INFO L78 Accepts]: Start accepts. Automaton has 23496 states and 34167 transitions. Word has length 81 [2020-10-29 13:44:29,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:44:29,368 INFO L481 AbstractCegarLoop]: Abstraction has 23496 states and 34167 transitions. [2020-10-29 13:44:29,368 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:44:29,368 INFO L276 IsEmpty]: Start isEmpty. Operand 23496 states and 34167 transitions. [2020-10-29 13:44:29,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-29 13:44:29,376 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:44:29,376 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:44:29,376 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 13:44:29,376 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:44:29,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:44:29,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1645438425, now seen corresponding path program 1 times [2020-10-29 13:44:29,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:44:29,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1026660701] [2020-10-29 13:44:29,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:44:29,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:44:29,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:29,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:29,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:29,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:29,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:30,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:34,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:34,403 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:44:34,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-29 13:44:34,404 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 13:44:34,404 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-29 13:44:34,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:44:34,404 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:44:34,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 13:44:34,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-29 13:44:34,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-29 13:44:34,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:44:34,648 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-29 13:44:34,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:44:34,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:44:34,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:34,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:44:34,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:44:34,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:44:34,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-29 13:44:34,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:44:34,677 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:44:34,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:44:34,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:44:34,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:44:34,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:44:34,706 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-29 13:44:34,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1026660701] [2020-10-29 13:44:34,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:44:34,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 13:44:34,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853336848] [2020-10-29 13:44:34,707 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 13:44:34,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:44:34,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 13:44:34,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:44:34,708 INFO L87 Difference]: Start difference. First operand 23496 states and 34167 transitions. Second operand 7 states. [2020-10-29 13:44:34,923 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-29 13:44:35,947 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-29 13:44:36,123 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-29 13:44:38,595 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-29 13:44:38,825 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 156 [2020-10-29 13:44:39,031 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-29 13:44:39,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:44:39,787 INFO L93 Difference]: Finished difference Result 68706 states and 101168 transitions. [2020-10-29 13:44:39,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 13:44:39,788 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 82 [2020-10-29 13:44:39,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:44:39,944 INFO L225 Difference]: With dead ends: 68706 [2020-10-29 13:44:39,945 INFO L226 Difference]: Without dead ends: 57527 [2020-10-29 13:44:39,993 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2020-10-29 13:44:40,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57527 states. [2020-10-29 13:44:43,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57527 to 38828. [2020-10-29 13:44:43,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38828 states. [2020-10-29 13:44:43,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38828 states to 38828 states and 56435 transitions. [2020-10-29 13:44:43,226 INFO L78 Accepts]: Start accepts. Automaton has 38828 states and 56435 transitions. Word has length 82 [2020-10-29 13:44:43,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:44:43,226 INFO L481 AbstractCegarLoop]: Abstraction has 38828 states and 56435 transitions. [2020-10-29 13:44:43,226 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 13:44:43,226 INFO L276 IsEmpty]: Start isEmpty. Operand 38828 states and 56435 transitions. [2020-10-29 13:44:43,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-29 13:44:43,234 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:44:43,234 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:44:43,234 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 13:44:43,234 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:44:43,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:44:43,235 INFO L82 PathProgramCache]: Analyzing trace with hash -304481980, now seen corresponding path program 1 times [2020-10-29 13:44:43,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:44:43,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [142332578] [2020-10-29 13:44:43,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:44:43,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:44:43,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:43,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:43,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:43,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:43,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:45,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:45,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:48,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:44:48,285 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-29 13:44:48,285 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 13:44:48,285 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-29 13:44:48,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:44:48,285 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:44:48,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 13:44:48,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 13:44:48,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-29 13:44:48,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:44:48,530 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-29 13:44:48,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:44:48,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:44:48,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:48,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:44:48,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:44:48,559 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:44:48,559 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-29 13:44:48,559 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:44:48,559 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:44:48,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:44:48,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:44:48,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:44:48,561 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:44:48,596 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-29 13:44:48,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [142332578] [2020-10-29 13:44:48,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:44:48,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 13:44:48,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521477611] [2020-10-29 13:44:48,598 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 13:44:48,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:44:48,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 13:44:48,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:44:48,599 INFO L87 Difference]: Start difference. First operand 38828 states and 56435 transitions. Second operand 7 states. [2020-10-29 13:44:48,902 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-29 13:44:50,011 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-29 13:44:50,200 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-29 13:44:52,683 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 156 [2020-10-29 13:44:52,885 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-29 13:44:53,166 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-29 13:44:54,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:44:54,101 INFO L93 Difference]: Finished difference Result 82962 states and 121024 transitions. [2020-10-29 13:44:54,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 13:44:54,102 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 82 [2020-10-29 13:44:54,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:44:54,236 INFO L225 Difference]: With dead ends: 82962 [2020-10-29 13:44:54,236 INFO L226 Difference]: Without dead ends: 65303 [2020-10-29 13:44:54,287 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2020-10-29 13:44:54,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65303 states. [2020-10-29 13:44:58,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65303 to 46324. [2020-10-29 13:44:58,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46324 states. [2020-10-29 13:44:58,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46324 states to 46324 states and 67227 transitions. [2020-10-29 13:44:58,291 INFO L78 Accepts]: Start accepts. Automaton has 46324 states and 67227 transitions. Word has length 82 [2020-10-29 13:44:58,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:44:58,291 INFO L481 AbstractCegarLoop]: Abstraction has 46324 states and 67227 transitions. [2020-10-29 13:44:58,291 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 13:44:58,291 INFO L276 IsEmpty]: Start isEmpty. Operand 46324 states and 67227 transitions. [2020-10-29 13:44:58,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-29 13:44:58,307 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:44:58,308 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:44:58,308 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 13:44:58,308 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:44:58,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:44:58,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1108181957, now seen corresponding path program 1 times [2020-10-29 13:44:58,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:44:58,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1355752652] [2020-10-29 13:44:58,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:44:58,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:44:58,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:58,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:58,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:00,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:45:00,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-29 13:45:00,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 13:45:00,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1944 [2020-10-29 13:45:00,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:45:00,282 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:45:00,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 13:45:00,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 13:45:00,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-29 13:45:00,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:45:00,647 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-29 13:45:00,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:45:00,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:45:00,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:00,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:45:00,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:45:00,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:45:00,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 13:45:00,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:45:00,664 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:45:00,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:45:00,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:45:00,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:45:00,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:45:00,691 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-29 13:45:00,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1355752652] [2020-10-29 13:45:00,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:45:00,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 13:45:00,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963304630] [2020-10-29 13:45:00,693 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 13:45:00,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:45:00,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 13:45:00,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:45:00,695 INFO L87 Difference]: Start difference. First operand 46324 states and 67227 transitions. Second operand 7 states. [2020-10-29 13:45:00,920 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-29 13:45:01,969 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-29 13:45:02,238 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-29 13:45:05,295 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-29 13:45:05,530 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-29 13:45:05,721 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 156 [2020-10-29 13:45:07,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:45:07,059 INFO L93 Difference]: Finished difference Result 84638 states and 123176 transitions. [2020-10-29 13:45:07,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 13:45:07,059 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 82 [2020-10-29 13:45:07,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:45:07,192 INFO L225 Difference]: With dead ends: 84638 [2020-10-29 13:45:07,192 INFO L226 Difference]: Without dead ends: 72411 [2020-10-29 13:45:07,244 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2020-10-29 13:45:07,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72411 states. [2020-10-29 13:45:11,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72411 to 52612. [2020-10-29 13:45:11,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52612 states. [2020-10-29 13:45:11,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52612 states to 52612 states and 76347 transitions. [2020-10-29 13:45:11,511 INFO L78 Accepts]: Start accepts. Automaton has 52612 states and 76347 transitions. Word has length 82 [2020-10-29 13:45:11,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:45:11,511 INFO L481 AbstractCegarLoop]: Abstraction has 52612 states and 76347 transitions. [2020-10-29 13:45:11,512 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 13:45:11,512 INFO L276 IsEmpty]: Start isEmpty. Operand 52612 states and 76347 transitions. [2020-10-29 13:45:11,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-29 13:45:11,520 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:45:11,520 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:45:11,521 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 13:45:11,521 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:45:11,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:45:11,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1098826916, now seen corresponding path program 1 times [2020-10-29 13:45:11,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:45:11,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [38027602] [2020-10-29 13:45:11,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:45:11,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:45:11,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:11,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:11,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:11,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:12,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:12,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:14,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:16,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:45:16,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-29 13:45:16,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 13:45:16,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-29 13:45:16,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:45:16,548 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:45:16,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 13:45:16,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 13:45:16,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-29 13:45:16,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:45:16,756 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-29 13:45:16,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:45:16,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:45:16,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:16,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:45:16,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:45:16,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:45:16,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 13:45:16,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:45:16,772 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:45:16,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:45:16,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:45:16,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:45:16,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:45:16,797 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-29 13:45:16,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [38027602] [2020-10-29 13:45:16,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:45:16,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 13:45:16,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199909689] [2020-10-29 13:45:16,799 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 13:45:16,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:45:16,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 13:45:16,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:45:16,800 INFO L87 Difference]: Start difference. First operand 52612 states and 76347 transitions. Second operand 7 states. [2020-10-29 13:45:17,033 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-29 13:45:17,972 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-29 13:45:18,166 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-29 13:45:21,157 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-29 13:45:21,360 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 156 [2020-10-29 13:45:21,584 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-29 13:45:23,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:45:23,132 INFO L93 Difference]: Finished difference Result 82045 states and 119145 transitions. [2020-10-29 13:45:23,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 13:45:23,135 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 82 [2020-10-29 13:45:23,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:45:23,263 INFO L225 Difference]: With dead ends: 82045 [2020-10-29 13:45:23,263 INFO L226 Difference]: Without dead ends: 75690 [2020-10-29 13:45:23,290 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2020-10-29 13:45:23,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75690 states. [2020-10-29 13:45:27,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75690 to 55876. [2020-10-29 13:45:27,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55876 states. [2020-10-29 13:45:27,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55876 states to 55876 states and 81067 transitions. [2020-10-29 13:45:27,969 INFO L78 Accepts]: Start accepts. Automaton has 55876 states and 81067 transitions. Word has length 82 [2020-10-29 13:45:27,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:45:27,969 INFO L481 AbstractCegarLoop]: Abstraction has 55876 states and 81067 transitions. [2020-10-29 13:45:27,969 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 13:45:27,969 INFO L276 IsEmpty]: Start isEmpty. Operand 55876 states and 81067 transitions. [2020-10-29 13:45:27,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-29 13:45:27,979 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:45:27,979 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:45:27,979 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-29 13:45:27,979 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:45:27,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:45:27,980 INFO L82 PathProgramCache]: Analyzing trace with hash 1410494409, now seen corresponding path program 1 times [2020-10-29 13:45:27,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:45:27,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1167327719] [2020-10-29 13:45:27,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:45:28,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:45:28,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:28,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:28,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:28,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:28,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:28,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:28,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:30,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:30,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:30,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:31,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:33,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:45:33,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-29 13:45:33,010 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-29 13:45:33,010 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-29 13:45:33,010 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:45:33,010 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:45:33,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:45:33,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:45:33,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-29 13:45:33,011 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:45:33,240 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-29 13:45:33,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:45:33,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:45:33,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:33,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:45:33,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:45:33,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:45:33,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-29 13:45:33,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:45:33,265 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:45:33,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:45:33,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:45:33,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:45:33,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:45:33,281 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:45:33,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1167327719] [2020-10-29 13:45:33,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:45:33,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 13:45:33,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523265317] [2020-10-29 13:45:33,282 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:45:33,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:45:33,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:45:33,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:45:33,283 INFO L87 Difference]: Start difference. First operand 55876 states and 81067 transitions. Second operand 8 states. [2020-10-29 13:45:33,499 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-29 13:45:35,020 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-29 13:45:35,397 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-29 13:45:40,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:45:40,961 INFO L93 Difference]: Finished difference Result 107396 states and 154517 transitions. [2020-10-29 13:45:40,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 13:45:40,962 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 85 [2020-10-29 13:45:40,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:45:41,111 INFO L225 Difference]: With dead ends: 107396 [2020-10-29 13:45:41,111 INFO L226 Difference]: Without dead ends: 85925 [2020-10-29 13:45:41,147 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-10-29 13:45:41,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85925 states. [2020-10-29 13:45:46,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85925 to 58198. [2020-10-29 13:45:46,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58198 states. [2020-10-29 13:45:46,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58198 states to 58198 states and 83901 transitions. [2020-10-29 13:45:46,961 INFO L78 Accepts]: Start accepts. Automaton has 58198 states and 83901 transitions. Word has length 85 [2020-10-29 13:45:46,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:45:46,961 INFO L481 AbstractCegarLoop]: Abstraction has 58198 states and 83901 transitions. [2020-10-29 13:45:46,961 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:45:46,961 INFO L276 IsEmpty]: Start isEmpty. Operand 58198 states and 83901 transitions. [2020-10-29 13:45:46,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-29 13:45:46,967 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:45:46,968 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:45:46,968 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-29 13:45:46,968 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:45:46,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:45:46,968 INFO L82 PathProgramCache]: Analyzing trace with hash -2117915905, now seen corresponding path program 1 times [2020-10-29 13:45:46,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:45:46,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [80538851] [2020-10-29 13:45:46,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:45:46,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:45:47,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:47,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:47,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:47,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:47,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:47,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:47,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:47,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:48,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:51,991 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:45:51,993 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-29 13:45:51,993 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 13:45:51,993 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-29 13:45:51,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:45:51,994 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:45:51,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:45:51,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 13:45:51,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-29 13:45:51,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:45:52,223 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-29 13:45:52,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:45:52,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:45:52,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:52,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:45:52,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:45:52,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:45:52,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 13:45:52,245 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:45:52,245 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:45:52,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:45:52,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:45:52,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:45:52,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:45:52,259 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:45:52,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [80538851] [2020-10-29 13:45:52,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:45:52,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 13:45:52,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578931942] [2020-10-29 13:45:52,260 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:45:52,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:45:52,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:45:52,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:45:52,261 INFO L87 Difference]: Start difference. First operand 58198 states and 83901 transitions. Second operand 8 states. [2020-10-29 13:45:52,472 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-10-29 13:45:54,768 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-29 13:45:55,012 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-29 13:45:55,252 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-29 13:46:11,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:46:11,608 INFO L93 Difference]: Finished difference Result 264862 states and 379899 transitions. [2020-10-29 13:46:11,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-29 13:46:11,608 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 85 [2020-10-29 13:46:11,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:46:12,186 INFO L225 Difference]: With dead ends: 264862 [2020-10-29 13:46:12,186 INFO L226 Difference]: Without dead ends: 206697 [2020-10-29 13:46:12,267 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2020-10-29 13:46:12,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206697 states. [2020-10-29 13:46:23,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206697 to 112826. [2020-10-29 13:46:23,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112826 states. [2020-10-29 13:46:23,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112826 states to 112826 states and 161477 transitions. [2020-10-29 13:46:23,986 INFO L78 Accepts]: Start accepts. Automaton has 112826 states and 161477 transitions. Word has length 85 [2020-10-29 13:46:23,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:46:23,989 INFO L481 AbstractCegarLoop]: Abstraction has 112826 states and 161477 transitions. [2020-10-29 13:46:23,989 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:46:23,990 INFO L276 IsEmpty]: Start isEmpty. Operand 112826 states and 161477 transitions. [2020-10-29 13:46:24,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-29 13:46:24,002 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:46:24,002 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:46:24,002 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-29 13:46:24,002 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:46:24,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:46:24,003 INFO L82 PathProgramCache]: Analyzing trace with hash -1743143819, now seen corresponding path program 1 times [2020-10-29 13:46:24,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:46:24,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [697419532] [2020-10-29 13:46:24,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:46:24,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:46:24,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:24,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:24,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:24,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:24,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:29,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:46:29,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-29 13:46:29,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 13:46:29,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-29 13:46:29,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:46:29,032 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:46:29,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:46:29,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:46:29,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-29 13:46:29,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:46:29,357 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-29 13:46:29,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:46:29,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:46:29,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:29,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:46:29,378 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:46:29,378 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:46:29,378 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-29 13:46:29,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:46:29,379 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:46:29,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:46:29,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:46:29,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:46:29,379 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:46:29,405 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:46:29,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [697419532] [2020-10-29 13:46:29,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:46:29,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 13:46:29,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381394755] [2020-10-29 13:46:29,406 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:46:29,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:46:29,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:46:29,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:46:29,407 INFO L87 Difference]: Start difference. First operand 112826 states and 161477 transitions. Second operand 8 states. [2020-10-29 13:46:29,642 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-29 13:46:31,882 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-29 13:46:32,541 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-29 13:46:57,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:46:57,218 INFO L93 Difference]: Finished difference Result 371009 states and 529015 transitions. [2020-10-29 13:46:57,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 13:46:57,219 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 85 [2020-10-29 13:46:57,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:46:57,967 INFO L225 Difference]: With dead ends: 371009 [2020-10-29 13:46:57,967 INFO L226 Difference]: Without dead ends: 258216 [2020-10-29 13:46:58,093 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-29 13:46:58,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258216 states. [2020-10-29 13:47:14,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258216 to 146763. [2020-10-29 13:47:14,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146763 states. [2020-10-29 13:47:14,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146763 states to 146763 states and 206944 transitions. [2020-10-29 13:47:14,565 INFO L78 Accepts]: Start accepts. Automaton has 146763 states and 206944 transitions. Word has length 85 [2020-10-29 13:47:14,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:47:14,566 INFO L481 AbstractCegarLoop]: Abstraction has 146763 states and 206944 transitions. [2020-10-29 13:47:14,566 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:47:14,566 INFO L276 IsEmpty]: Start isEmpty. Operand 146763 states and 206944 transitions. [2020-10-29 13:47:14,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-29 13:47:14,580 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:47:14,580 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:47:14,580 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-29 13:47:14,580 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:47:14,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:47:14,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1706442858, now seen corresponding path program 1 times [2020-10-29 13:47:14,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:47:14,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1876846241] [2020-10-29 13:47:14,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:47:14,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:47:14,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:47:14,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:47:14,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:47:14,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:47:15,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:47:15,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:47:15,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:47:15,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:47:15,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:47:19,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:47:19,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-29 13:47:19,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 13:47:19,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-29 13:47:19,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:47:19,613 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:47:19,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:47:19,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-29 13:47:19,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-29 13:47:19,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:47:19,814 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-29 13:47:19,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:47:19,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:47:19,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:47:19,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:47:19,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:47:19,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:47:19,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 13:47:19,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:47:19,830 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:47:19,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:47:19,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:47:19,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:47:19,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:47:19,845 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:47:19,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1876846241] [2020-10-29 13:47:19,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:47:19,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-29 13:47:19,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176503623] [2020-10-29 13:47:19,846 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:47:19,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:47:19,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:47:19,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:47:19,847 INFO L87 Difference]: Start difference. First operand 146763 states and 206944 transitions. Second operand 6 states. [2020-10-29 13:47:20,046 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-10-29 13:47:23,224 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-29 13:47:23,639 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 152