/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 18:54:52,784 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 18:54:52,790 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 18:54:52,848 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 18:54:52,849 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 18:54:52,855 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 18:54:52,857 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 18:54:52,864 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 18:54:52,868 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 18:54:52,875 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 18:54:52,876 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 18:54:52,878 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 18:54:52,878 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 18:54:52,881 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 18:54:52,883 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 18:54:52,885 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 18:54:52,886 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 18:54:52,889 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 18:54:52,904 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 18:54:52,909 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 18:54:52,911 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 18:54:52,912 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 18:54:52,913 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 18:54:52,914 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 18:54:52,916 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 18:54:52,917 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 18:54:52,920 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 18:54:52,921 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 18:54:52,922 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 18:54:52,924 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 18:54:52,924 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 18:54:52,925 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 18:54:52,928 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 18:54:52,928 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 18:54:52,929 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 18:54:52,930 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 18:54:52,930 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 18:54:52,931 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 18:54:52,931 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 18:54:52,932 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 18:54:52,932 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 18:54:52,940 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 [2020-10-28 18:54:52,985 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 18:54:52,985 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 18:54:52,986 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 18:54:52,987 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 18:54:52,987 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 18:54:52,987 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 18:54:52,987 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 18:54:52,988 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 18:54:52,988 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 18:54:52,988 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 18:54:52,988 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 18:54:52,988 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 18:54:52,989 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 18:54:52,989 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 18:54:52,989 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 18:54:52,989 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 18:54:52,989 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 18:54:52,990 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 18:54:52,990 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 18:54:52,990 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 18:54:52,990 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 18:54:52,990 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 18:54:52,991 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 18:54:52,991 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 18:54:52,991 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 18:54:52,991 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 18:54:52,991 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 18:54:52,992 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 18:54:52,992 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 18:54:52,992 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 18:54:53,340 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 18:54:53,366 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 18:54:53,369 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 18:54:53,371 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 18:54:53,372 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 18:54:53,373 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-28 18:54:53,458 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c2c977668/7c77c0f6a2004f99a8fb092510922b48/FLAGdd0be38cd [2020-10-28 18:54:54,181 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 18:54:54,182 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-28 18:54:54,199 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c2c977668/7c77c0f6a2004f99a8fb092510922b48/FLAGdd0be38cd [2020-10-28 18:54:54,508 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c2c977668/7c77c0f6a2004f99a8fb092510922b48 [2020-10-28 18:54:54,513 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 18:54:54,522 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 18:54:54,526 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 18:54:54,526 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 18:54:54,530 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 18:54:54,531 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:54:54" (1/1) ... [2020-10-28 18:54:54,537 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@467a846a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:54:54, skipping insertion in model container [2020-10-28 18:54:54,538 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:54:54" (1/1) ... [2020-10-28 18:54:54,547 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 18:54:54,620 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 18:54:54,956 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:54:54,970 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 18:54:55,080 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:54:55,121 INFO L208 MainTranslator]: Completed translation [2020-10-28 18:54:55,121 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:54:55 WrapperNode [2020-10-28 18:54:55,121 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 18:54:55,123 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 18:54:55,123 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 18:54:55,123 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 18:54:55,136 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:54:55" (1/1) ... [2020-10-28 18:54:55,137 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:54:55" (1/1) ... [2020-10-28 18:54:55,152 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:54:55" (1/1) ... [2020-10-28 18:54:55,153 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:54:55" (1/1) ... [2020-10-28 18:54:55,170 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:54:55" (1/1) ... [2020-10-28 18:54:55,189 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:54:55" (1/1) ... [2020-10-28 18:54:55,196 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:54:55" (1/1) ... [2020-10-28 18:54:55,210 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 18:54:55,211 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 18:54:55,212 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 18:54:55,212 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 18:54:55,215 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:54:55" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 18:54:55,287 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 18:54:55,287 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 18:54:55,287 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 18:54:55,288 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 18:54:55,288 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 18:54:55,288 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 18:54:55,288 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 18:54:55,288 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 18:54:55,288 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 18:54:55,289 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 18:54:55,289 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 18:54:55,289 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-28 18:54:55,289 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 18:54:55,289 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 18:54:55,289 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 18:54:55,290 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 18:54:55,290 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 18:54:55,290 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 18:54:55,290 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 18:54:55,290 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 18:54:55,290 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 18:54:55,290 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 18:54:55,291 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 18:54:55,291 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 18:54:55,291 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 18:54:55,291 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 18:54:55,291 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 18:54:55,291 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 18:54:56,217 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 18:54:56,218 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 18:54:56,220 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:54:56 BoogieIcfgContainer [2020-10-28 18:54:56,220 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 18:54:56,223 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 18:54:56,223 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 18:54:56,227 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 18:54:56,227 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 06:54:54" (1/3) ... [2020-10-28 18:54:56,228 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bddd45f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:54:56, skipping insertion in model container [2020-10-28 18:54:56,228 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:54:55" (2/3) ... [2020-10-28 18:54:56,229 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bddd45f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:54:56, skipping insertion in model container [2020-10-28 18:54:56,229 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:54:56" (3/3) ... [2020-10-28 18:54:56,230 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-28 18:54:56,243 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 18:54:56,249 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 18:54:56,263 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 18:54:56,295 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 18:54:56,295 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 18:54:56,296 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 18:54:56,296 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 18:54:56,296 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 18:54:56,296 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 18:54:56,296 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 18:54:56,296 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 18:54:56,321 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states. [2020-10-28 18:54:56,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-28 18:54:56,331 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:54:56,332 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:54:56,332 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:54:56,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:54:56,340 INFO L82 PathProgramCache]: Analyzing trace with hash -1313524885, now seen corresponding path program 1 times [2020-10-28 18:54:56,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:54:56,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [506562607] [2020-10-28 18:54:56,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:54:56,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:54:56,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:57,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:57,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:59,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:54:59,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-28 18:54:59,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 18:54:59,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2378 [2020-10-28 18:54:59,079 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:54:59,079 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:54:59,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:54:59,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-28 18:54:59,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 18:54:59,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 18:54:59,372 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-28 18:54:59,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:54:59,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:54:59,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:54:59,422 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:54:59,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:54:59,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:54:59,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-28 18:54:59,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:54:59,424 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:54:59,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:54:59,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:54:59,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:54:59,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:54:59,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:54:59,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [506562607] [2020-10-28 18:54:59,456 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:54:59,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:54:59,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110223974] [2020-10-28 18:54:59,464 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:54:59,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:54:59,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:54:59,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:54:59,488 INFO L87 Difference]: Start difference. First operand 170 states. Second operand 4 states. [2020-10-28 18:54:59,730 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-28 18:55:00,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:55:00,681 INFO L93 Difference]: Finished difference Result 321 states and 516 transitions. [2020-10-28 18:55:00,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:55:00,684 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 54 [2020-10-28 18:55:00,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:55:00,698 INFO L225 Difference]: With dead ends: 321 [2020-10-28 18:55:00,698 INFO L226 Difference]: Without dead ends: 241 [2020-10-28 18:55:00,702 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:55:00,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-10-28 18:55:00,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 238. [2020-10-28 18:55:00,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2020-10-28 18:55:00,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 355 transitions. [2020-10-28 18:55:00,777 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 355 transitions. Word has length 54 [2020-10-28 18:55:00,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:55:00,778 INFO L481 AbstractCegarLoop]: Abstraction has 238 states and 355 transitions. [2020-10-28 18:55:00,778 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:55:00,778 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 355 transitions. [2020-10-28 18:55:00,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-28 18:55:00,781 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:55:00,782 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] [2020-10-28 18:55:00,782 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 18:55:00,782 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:55:00,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:55:00,783 INFO L82 PathProgramCache]: Analyzing trace with hash -1142379061, now seen corresponding path program 1 times [2020-10-28 18:55:00,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:55:00,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [397944636] [2020-10-28 18:55:00,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:55:00,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:55:00,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:00,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:00,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:01,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:02,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:05,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:55:05,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-28 18:55:05,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 18:55:05,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 18:55:05,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:55:05,840 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:55:05,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:55:05,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-28 18:55:05,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 18:55:05,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-28 18:55:06,084 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-28 18:55:06,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:55:06,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:55:06,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:06,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:55:06,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:55:06,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:55:06,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-28 18:55:06,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:55:06,117 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:55:06,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:55:06,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:55:06,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:55:06,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:55:06,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:55:06,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [397944636] [2020-10-28 18:55:06,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:55:06,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:55:06,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247732984] [2020-10-28 18:55:06,141 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:55:06,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:55:06,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:55:06,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:55:06,153 INFO L87 Difference]: Start difference. First operand 238 states and 355 transitions. Second operand 4 states. [2020-10-28 18:55:06,364 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2020-10-28 18:55:07,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:55:07,100 INFO L93 Difference]: Finished difference Result 574 states and 879 transitions. [2020-10-28 18:55:07,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:55:07,102 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 57 [2020-10-28 18:55:07,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:55:07,107 INFO L225 Difference]: With dead ends: 574 [2020-10-28 18:55:07,109 INFO L226 Difference]: Without dead ends: 407 [2020-10-28 18:55:07,112 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 [2020-10-28 18:55:07,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2020-10-28 18:55:07,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 404. [2020-10-28 18:55:07,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 404 states. [2020-10-28 18:55:07,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 607 transitions. [2020-10-28 18:55:07,191 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 607 transitions. Word has length 57 [2020-10-28 18:55:07,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:55:07,193 INFO L481 AbstractCegarLoop]: Abstraction has 404 states and 607 transitions. [2020-10-28 18:55:07,193 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:55:07,193 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 607 transitions. [2020-10-28 18:55:07,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-28 18:55:07,199 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:55:07,199 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] [2020-10-28 18:55:07,202 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 18:55:07,202 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:55:07,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:55:07,203 INFO L82 PathProgramCache]: Analyzing trace with hash -915987511, now seen corresponding path program 1 times [2020-10-28 18:55:07,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:55:07,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2129435264] [2020-10-28 18:55:07,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:55:07,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:55:07,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:07,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:07,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:07,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:07,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:12,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:55:12,237 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-28 18:55:12,237 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 18:55:12,238 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-28 18:55:12,238 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:55:12,240 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:55:12,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:55:12,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-28 18:55:12,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 18:55:12,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 18:55:12,473 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-28 18:55:12,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:55:12,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:55:12,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:12,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:55:12,493 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:55:12,493 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:55:12,493 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 18:55:12,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:55:12,493 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:55:12,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:55:12,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:55:12,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:55:12,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:55:12,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:55:12,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2129435264] [2020-10-28 18:55:12,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:55:12,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:55:12,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019574250] [2020-10-28 18:55:12,510 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:55:12,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:55:12,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:55:12,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:55:12,512 INFO L87 Difference]: Start difference. First operand 404 states and 607 transitions. Second operand 4 states. [2020-10-28 18:55:12,708 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2020-10-28 18:55:13,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:55:13,391 INFO L93 Difference]: Finished difference Result 978 states and 1493 transitions. [2020-10-28 18:55:13,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:55:13,394 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 57 [2020-10-28 18:55:13,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:55:13,401 INFO L225 Difference]: With dead ends: 978 [2020-10-28 18:55:13,402 INFO L226 Difference]: Without dead ends: 693 [2020-10-28 18:55:13,408 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 [2020-10-28 18:55:13,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states. [2020-10-28 18:55:13,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 690. [2020-10-28 18:55:13,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 690 states. [2020-10-28 18:55:13,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 690 states to 690 states and 1033 transitions. [2020-10-28 18:55:13,458 INFO L78 Accepts]: Start accepts. Automaton has 690 states and 1033 transitions. Word has length 57 [2020-10-28 18:55:13,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:55:13,459 INFO L481 AbstractCegarLoop]: Abstraction has 690 states and 1033 transitions. [2020-10-28 18:55:13,460 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:55:13,460 INFO L276 IsEmpty]: Start isEmpty. Operand 690 states and 1033 transitions. [2020-10-28 18:55:13,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-28 18:55:13,473 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:55:13,473 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] [2020-10-28 18:55:13,473 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 18:55:13,474 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:55:13,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:55:13,475 INFO L82 PathProgramCache]: Analyzing trace with hash -1907474551, now seen corresponding path program 1 times [2020-10-28 18:55:13,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:55:13,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1744445165] [2020-10-28 18:55:13,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:55:13,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:55:13,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:13,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:13,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:13,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:13,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:18,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:55:18,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-28 18:55:18,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 18:55:18,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 18:55:18,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:55:18,503 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:55:18,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:55:18,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-28 18:55:18,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 18:55:18,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:55:18,728 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-28 18:55:18,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:55:18,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:55:18,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:18,746 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:55:18,747 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:55:18,747 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:55:18,747 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 18:55:18,747 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:55:18,747 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:55:18,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:55:18,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:55:18,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:55:18,748 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:55:18,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:55:18,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1744445165] [2020-10-28 18:55:18,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:55:18,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:55:18,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870144665] [2020-10-28 18:55:18,764 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:55:18,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:55:18,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:55:18,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:55:18,765 INFO L87 Difference]: Start difference. First operand 690 states and 1033 transitions. Second operand 4 states. [2020-10-28 18:55:18,968 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2020-10-28 18:55:19,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:55:19,743 INFO L93 Difference]: Finished difference Result 1766 states and 2659 transitions. [2020-10-28 18:55:19,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:55:19,744 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 57 [2020-10-28 18:55:19,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:55:19,751 INFO L225 Difference]: With dead ends: 1766 [2020-10-28 18:55:19,751 INFO L226 Difference]: Without dead ends: 1171 [2020-10-28 18:55:19,754 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 [2020-10-28 18:55:19,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1171 states. [2020-10-28 18:55:19,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1171 to 1168. [2020-10-28 18:55:19,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1168 states. [2020-10-28 18:55:19,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1168 states to 1168 states and 1715 transitions. [2020-10-28 18:55:19,820 INFO L78 Accepts]: Start accepts. Automaton has 1168 states and 1715 transitions. Word has length 57 [2020-10-28 18:55:19,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:55:19,820 INFO L481 AbstractCegarLoop]: Abstraction has 1168 states and 1715 transitions. [2020-10-28 18:55:19,820 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:55:19,821 INFO L276 IsEmpty]: Start isEmpty. Operand 1168 states and 1715 transitions. [2020-10-28 18:55:19,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-28 18:55:19,823 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:55:19,823 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] [2020-10-28 18:55:19,823 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 18:55:19,823 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:55:19,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:55:19,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1674236509, now seen corresponding path program 1 times [2020-10-28 18:55:19,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:55:19,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1444419225] [2020-10-28 18:55:19,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:55:19,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:55:19,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:19,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:19,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:20,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:20,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:22,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:55:22,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-28 18:55:22,870 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 18:55:22,870 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3012 [2020-10-28 18:55:22,870 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:55:22,870 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:55:22,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:55:22,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:55:22,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-28 18:55:22,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:55:23,243 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-28 18:55:23,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:55:23,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:55:23,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:23,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:55:23,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:55:23,285 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:55:23,285 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-28 18:55:23,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:55:23,285 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:55:23,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:55:23,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:55:23,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:55:23,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:55:23,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:55:23,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1444419225] [2020-10-28 18:55:23,310 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:55:23,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 18:55:23,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786748064] [2020-10-28 18:55:23,312 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:55:23,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:55:23,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:55:23,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:55:23,313 INFO L87 Difference]: Start difference. First operand 1168 states and 1715 transitions. Second operand 8 states. [2020-10-28 18:55:23,526 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-28 18:55:24,253 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-28 18:55:25,026 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-28 18:55:25,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:55:25,239 INFO L93 Difference]: Finished difference Result 4420 states and 6538 transitions. [2020-10-28 18:55:25,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 18:55:25,240 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 58 [2020-10-28 18:55:25,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:55:25,259 INFO L225 Difference]: With dead ends: 4420 [2020-10-28 18:55:25,260 INFO L226 Difference]: Without dead ends: 3561 [2020-10-28 18:55:25,263 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-28 18:55:25,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3561 states. [2020-10-28 18:55:25,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3561 to 1196. [2020-10-28 18:55:25,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1196 states. [2020-10-28 18:55:25,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1196 states to 1196 states and 1727 transitions. [2020-10-28 18:55:25,392 INFO L78 Accepts]: Start accepts. Automaton has 1196 states and 1727 transitions. Word has length 58 [2020-10-28 18:55:25,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:55:25,392 INFO L481 AbstractCegarLoop]: Abstraction has 1196 states and 1727 transitions. [2020-10-28 18:55:25,392 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 18:55:25,393 INFO L276 IsEmpty]: Start isEmpty. Operand 1196 states and 1727 transitions. [2020-10-28 18:55:25,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-28 18:55:25,395 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:55:25,395 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] [2020-10-28 18:55:25,396 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 18:55:25,396 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:55:25,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:55:25,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1014371839, now seen corresponding path program 1 times [2020-10-28 18:55:25,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:55:25,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [269507701] [2020-10-28 18:55:25,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:55:25,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:55:25,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:25,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:25,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:25,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:25,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:28,189 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:55:28,189 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-28 18:55:28,189 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 18:55:28,189 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2766 [2020-10-28 18:55:28,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:55:28,190 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:55:28,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:55:28,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:55:28,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-28 18:55:28,190 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:55:28,516 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-28 18:55:28,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:55:28,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:55:28,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:28,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:55:28,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:55:28,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:55:28,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-28 18:55:28,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:55:28,547 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:55:28,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:55:28,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:55:28,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:55:28,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:55:28,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:55:28,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [269507701] [2020-10-28 18:55:28,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:55:28,574 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 18:55:28,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527312058] [2020-10-28 18:55:28,575 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:55:28,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:55:28,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:55:28,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:55:28,576 INFO L87 Difference]: Start difference. First operand 1196 states and 1727 transitions. Second operand 8 states. [2020-10-28 18:55:28,779 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-28 18:55:29,540 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-28 18:55:30,340 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-28 18:55:30,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:55:30,579 INFO L93 Difference]: Finished difference Result 5050 states and 7317 transitions. [2020-10-28 18:55:30,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 18:55:30,580 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 58 [2020-10-28 18:55:30,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:55:30,602 INFO L225 Difference]: With dead ends: 5050 [2020-10-28 18:55:30,602 INFO L226 Difference]: Without dead ends: 4245 [2020-10-28 18:55:30,606 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-28 18:55:30,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4245 states. [2020-10-28 18:55:30,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4245 to 1308. [2020-10-28 18:55:30,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1308 states. [2020-10-28 18:55:30,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1308 states to 1308 states and 1847 transitions. [2020-10-28 18:55:30,765 INFO L78 Accepts]: Start accepts. Automaton has 1308 states and 1847 transitions. Word has length 58 [2020-10-28 18:55:30,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:55:30,766 INFO L481 AbstractCegarLoop]: Abstraction has 1308 states and 1847 transitions. [2020-10-28 18:55:30,767 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 18:55:30,767 INFO L276 IsEmpty]: Start isEmpty. Operand 1308 states and 1847 transitions. [2020-10-28 18:55:30,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-28 18:55:30,769 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:55:30,769 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] [2020-10-28 18:55:30,769 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 18:55:30,769 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:55:30,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:55:30,770 INFO L82 PathProgramCache]: Analyzing trace with hash -388207116, now seen corresponding path program 1 times [2020-10-28 18:55:30,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:55:30,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [256191750] [2020-10-28 18:55:30,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:55:30,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:55:30,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:30,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:30,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:30,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:31,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:33,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:55:33,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-28 18:55:33,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 18:55:33,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2583 [2020-10-28 18:55:33,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:55:33,381 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:55:33,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:55:33,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:55:33,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-28 18:55:33,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:55:33,700 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-28 18:55:33,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:55:33,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:55:33,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:33,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:55:33,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:55:33,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:55:33,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-28 18:55:33,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:55:33,746 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:55:33,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:55:33,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:55:33,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:55:33,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:55:33,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:55:33,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [256191750] [2020-10-28 18:55:33,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:55:33,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 18:55:33,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848058567] [2020-10-28 18:55:33,772 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:55:33,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:55:33,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:55:33,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:55:33,773 INFO L87 Difference]: Start difference. First operand 1308 states and 1847 transitions. Second operand 8 states. [2020-10-28 18:55:34,006 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-28 18:55:34,750 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-28 18:55:35,643 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-28 18:55:35,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:55:35,941 INFO L93 Difference]: Finished difference Result 6105 states and 8702 transitions. [2020-10-28 18:55:35,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 18:55:35,941 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 58 [2020-10-28 18:55:35,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:55:35,966 INFO L225 Difference]: With dead ends: 6105 [2020-10-28 18:55:35,967 INFO L226 Difference]: Without dead ends: 5258 [2020-10-28 18:55:35,971 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-28 18:55:35,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5258 states. [2020-10-28 18:55:36,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5258 to 1435. [2020-10-28 18:55:36,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1435 states. [2020-10-28 18:55:36,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1435 states to 1435 states and 1972 transitions. [2020-10-28 18:55:36,155 INFO L78 Accepts]: Start accepts. Automaton has 1435 states and 1972 transitions. Word has length 58 [2020-10-28 18:55:36,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:55:36,155 INFO L481 AbstractCegarLoop]: Abstraction has 1435 states and 1972 transitions. [2020-10-28 18:55:36,155 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 18:55:36,156 INFO L276 IsEmpty]: Start isEmpty. Operand 1435 states and 1972 transitions. [2020-10-28 18:55:36,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-28 18:55:36,158 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:55:36,158 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] [2020-10-28 18:55:36,158 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 18:55:36,159 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:55:36,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:55:36,159 INFO L82 PathProgramCache]: Analyzing trace with hash 929553127, now seen corresponding path program 1 times [2020-10-28 18:55:36,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:55:36,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [797914529] [2020-10-28 18:55:36,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:55:36,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:55:36,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:36,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:36,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:36,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:36,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:36,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:36,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:37,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:37,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:37,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:39,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:39,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:41,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:55:41,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-28 18:55:41,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 18:55:41,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-28 18:55:41,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:55:41,198 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:55:41,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:55:41,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-28 18:55:41,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-28 18:55:41,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:55:41,529 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-28 18:55:41,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:55:41,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:55:41,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:41,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:55:41,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:55:41,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:55:41,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 18:55:41,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:55:41,547 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:55:41,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:55:41,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:55:41,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:55:41,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:55:41,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:55:41,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [797914529] [2020-10-28 18:55:41,568 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:55:41,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 18:55:41,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341825529] [2020-10-28 18:55:41,569 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:55:41,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:55:41,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:55:41,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:55:41,570 INFO L87 Difference]: Start difference. First operand 1435 states and 1972 transitions. Second operand 6 states. [2020-10-28 18:55:41,894 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-28 18:55:42,535 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-28 18:55:43,304 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-28 18:55:43,512 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-28 18:55:43,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:55:43,606 INFO L93 Difference]: Finished difference Result 3498 states and 4944 transitions. [2020-10-28 18:55:43,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 18:55:43,606 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 59 [2020-10-28 18:55:43,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:55:43,620 INFO L225 Difference]: With dead ends: 3498 [2020-10-28 18:55:43,620 INFO L226 Difference]: Without dead ends: 2783 [2020-10-28 18:55:43,624 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-28 18:55:43,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2783 states. [2020-10-28 18:55:43,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2783 to 1620. [2020-10-28 18:55:43,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1620 states. [2020-10-28 18:55:43,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1620 states to 1620 states and 2251 transitions. [2020-10-28 18:55:43,829 INFO L78 Accepts]: Start accepts. Automaton has 1620 states and 2251 transitions. Word has length 59 [2020-10-28 18:55:43,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:55:43,830 INFO L481 AbstractCegarLoop]: Abstraction has 1620 states and 2251 transitions. [2020-10-28 18:55:43,830 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:55:43,830 INFO L276 IsEmpty]: Start isEmpty. Operand 1620 states and 2251 transitions. [2020-10-28 18:55:43,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-28 18:55:43,832 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:55:43,832 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] [2020-10-28 18:55:43,832 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 18:55:43,833 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:55:43,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:55:43,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1747762406, now seen corresponding path program 1 times [2020-10-28 18:55:43,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:55:43,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [981613278] [2020-10-28 18:55:43,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:55:43,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:55:43,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:43,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:43,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:43,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:44,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:44,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:45,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:45,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:45,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:45,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:45,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:46,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:48,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:55:48,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-28 18:55:48,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 18:55:48,859 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 18:55:48,859 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:55:48,859 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:55:48,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:55:48,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 18:55:48,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-28 18:55:48,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:55:49,108 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-28 18:55:49,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:55:49,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:55:49,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:49,127 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:55:49,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:55:49,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:55:49,128 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 18:55:49,128 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:55:49,128 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:55:49,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:55:49,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:55:49,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:55:49,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:55:49,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:55:49,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [981613278] [2020-10-28 18:55:49,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:55:49,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 18:55:49,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603456331] [2020-10-28 18:55:49,154 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:55:49,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:55:49,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:55:49,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:55:49,155 INFO L87 Difference]: Start difference. First operand 1620 states and 2251 transitions. Second operand 6 states. [2020-10-28 18:55:49,473 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-28 18:55:50,094 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-28 18:55:50,796 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-28 18:55:50,993 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-28 18:55:51,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:55:51,074 INFO L93 Difference]: Finished difference Result 4053 states and 5755 transitions. [2020-10-28 18:55:51,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 18:55:51,075 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 59 [2020-10-28 18:55:51,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:55:51,090 INFO L225 Difference]: With dead ends: 4053 [2020-10-28 18:55:51,091 INFO L226 Difference]: Without dead ends: 3338 [2020-10-28 18:55:51,094 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-28 18:55:51,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3338 states. [2020-10-28 18:55:51,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3338 to 2011. [2020-10-28 18:55:51,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2011 states. [2020-10-28 18:55:51,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2011 states to 2011 states and 2828 transitions. [2020-10-28 18:55:51,337 INFO L78 Accepts]: Start accepts. Automaton has 2011 states and 2828 transitions. Word has length 59 [2020-10-28 18:55:51,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:55:51,337 INFO L481 AbstractCegarLoop]: Abstraction has 2011 states and 2828 transitions. [2020-10-28 18:55:51,337 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:55:51,337 INFO L276 IsEmpty]: Start isEmpty. Operand 2011 states and 2828 transitions. [2020-10-28 18:55:51,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-28 18:55:51,340 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:55:51,340 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] [2020-10-28 18:55:51,340 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 18:55:51,340 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:55:51,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:55:51,341 INFO L82 PathProgramCache]: Analyzing trace with hash 890121976, now seen corresponding path program 1 times [2020-10-28 18:55:51,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:55:51,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1012007683] [2020-10-28 18:55:51,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:55:51,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:55:51,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:51,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:51,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:51,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:51,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:51,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:51,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:51,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:52,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:52,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:52,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:52,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:56,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:55:56,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-28 18:55:56,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 18:55:56,363 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 18:55:56,363 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:55:56,363 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:55:56,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:55:56,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 18:55:56,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-28 18:55:56,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:55:56,583 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-28 18:55:56,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:55:56,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:55:56,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:56,607 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:55:56,607 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:55:56,607 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:55:56,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 18:55:56,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:55:56,608 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:55:56,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:55:56,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:55:56,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:55:56,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:55:56,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:55:56,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1012007683] [2020-10-28 18:55:56,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:55:56,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 18:55:56,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499045892] [2020-10-28 18:55:56,629 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:55:56,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:55:56,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:55:56,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:55:56,630 INFO L87 Difference]: Start difference. First operand 2011 states and 2828 transitions. Second operand 6 states. [2020-10-28 18:55:56,861 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-28 18:55:57,538 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-28 18:55:58,182 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-28 18:55:58,369 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-28 18:55:58,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:55:58,469 INFO L93 Difference]: Finished difference Result 4390 states and 6237 transitions. [2020-10-28 18:55:58,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 18:55:58,470 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 59 [2020-10-28 18:55:58,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:55:58,487 INFO L225 Difference]: With dead ends: 4390 [2020-10-28 18:55:58,487 INFO L226 Difference]: Without dead ends: 3675 [2020-10-28 18:55:58,490 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-28 18:55:58,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3675 states. [2020-10-28 18:55:58,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3675 to 2403. [2020-10-28 18:55:58,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2403 states. [2020-10-28 18:55:58,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2403 states to 2403 states and 3397 transitions. [2020-10-28 18:55:58,808 INFO L78 Accepts]: Start accepts. Automaton has 2403 states and 3397 transitions. Word has length 59 [2020-10-28 18:55:58,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:55:58,808 INFO L481 AbstractCegarLoop]: Abstraction has 2403 states and 3397 transitions. [2020-10-28 18:55:58,808 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:55:58,808 INFO L276 IsEmpty]: Start isEmpty. Operand 2403 states and 3397 transitions. [2020-10-28 18:55:58,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-28 18:55:58,811 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:55:58,811 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:55:58,811 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 18:55:58,812 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:55:58,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:55:58,812 INFO L82 PathProgramCache]: Analyzing trace with hash -1986047488, now seen corresponding path program 1 times [2020-10-28 18:55:58,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:55:58,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [650885791] [2020-10-28 18:55:58,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:55:58,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:55:58,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:58,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:58,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:58,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:58,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:59,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:59,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:59,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:59,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:59,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:59,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:55:59,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:02,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:02,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:02,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:02,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:03,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:03,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:03,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:03,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:03,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:03,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:56:03,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-28 18:56:03,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 21 [2020-10-28 18:56:03,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 18:56:03,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:56:03,836 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:56:03,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:56:03,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-28 18:56:03,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-28 18:56:03,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:56:04,052 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-28 18:56:04,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:56:04,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:56:04,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:04,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:56:04,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:56:04,067 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:56:04,067 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 18:56:04,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:56:04,067 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:56:04,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:56:04,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:56:04,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:56:04,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:56:04,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:56:04,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [650885791] [2020-10-28 18:56:04,080 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:56:04,080 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 18:56:04,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348851527] [2020-10-28 18:56:04,084 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:56:04,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:56:04,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:56:04,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:56:04,085 INFO L87 Difference]: Start difference. First operand 2403 states and 3397 transitions. Second operand 6 states. [2020-10-28 18:56:04,308 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-28 18:56:05,546 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-28 18:56:05,874 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-28 18:56:07,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:56:07,960 INFO L93 Difference]: Finished difference Result 15335 states and 22294 transitions. [2020-10-28 18:56:07,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 18:56:07,961 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 63 [2020-10-28 18:56:07,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:56:07,994 INFO L225 Difference]: With dead ends: 15335 [2020-10-28 18:56:07,995 INFO L226 Difference]: Without dead ends: 13437 [2020-10-28 18:56:08,003 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-28 18:56:08,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13437 states. [2020-10-28 18:56:08,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13437 to 7402. [2020-10-28 18:56:08,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7402 states. [2020-10-28 18:56:08,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7402 states to 7402 states and 10662 transitions. [2020-10-28 18:56:08,981 INFO L78 Accepts]: Start accepts. Automaton has 7402 states and 10662 transitions. Word has length 63 [2020-10-28 18:56:08,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:56:08,981 INFO L481 AbstractCegarLoop]: Abstraction has 7402 states and 10662 transitions. [2020-10-28 18:56:08,981 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:56:08,981 INFO L276 IsEmpty]: Start isEmpty. Operand 7402 states and 10662 transitions. [2020-10-28 18:56:08,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-28 18:56:08,986 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:56:08,986 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:56:08,986 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 18:56:08,986 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:56:08,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:56:08,987 INFO L82 PathProgramCache]: Analyzing trace with hash -1780741756, now seen corresponding path program 1 times [2020-10-28 18:56:08,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:56:08,987 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2020741656] [2020-10-28 18:56:08,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:56:09,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:56:09,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:09,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:09,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:09,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:09,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:09,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:10,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:10,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:10,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:10,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:11,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:11,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:11,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:12,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:12,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:13,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:13,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:14,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:56:14,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-28 18:56:14,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-28 18:56:14,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 18:56:14,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:56:14,009 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:56:14,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:56:14,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 18:56:14,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-28 18:56:14,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:56:14,207 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-28 18:56:14,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:56:14,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:56:14,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:14,222 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:56:14,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:56:14,223 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:56:14,223 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 18:56:14,223 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:56:14,223 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:56:14,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:56:14,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:56:14,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:56:14,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:56:14,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:56:14,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2020741656] [2020-10-28 18:56:14,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:56:14,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 18:56:14,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018643154] [2020-10-28 18:56:14,241 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:56:14,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:56:14,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:56:14,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:56:14,242 INFO L87 Difference]: Start difference. First operand 7402 states and 10662 transitions. Second operand 6 states. [2020-10-28 18:56:14,424 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-28 18:56:15,984 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-28 18:56:16,334 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-28 18:56:21,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:56:21,335 INFO L93 Difference]: Finished difference Result 55524 states and 81303 transitions. [2020-10-28 18:56:21,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 18:56:21,336 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 63 [2020-10-28 18:56:21,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:56:21,456 INFO L225 Difference]: With dead ends: 55524 [2020-10-28 18:56:21,457 INFO L226 Difference]: Without dead ends: 48813 [2020-10-28 18:56:21,480 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-28 18:56:21,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48813 states. [2020-10-28 18:56:24,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48813 to 25631. [2020-10-28 18:56:24,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25631 states. [2020-10-28 18:56:24,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25631 states to 25631 states and 37268 transitions. [2020-10-28 18:56:24,564 INFO L78 Accepts]: Start accepts. Automaton has 25631 states and 37268 transitions. Word has length 63 [2020-10-28 18:56:24,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:56:24,564 INFO L481 AbstractCegarLoop]: Abstraction has 25631 states and 37268 transitions. [2020-10-28 18:56:24,564 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:56:24,564 INFO L276 IsEmpty]: Start isEmpty. Operand 25631 states and 37268 transitions. [2020-10-28 18:56:24,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-28 18:56:24,574 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:56:24,574 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:56:24,574 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 18:56:24,574 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:56:24,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:56:24,575 INFO L82 PathProgramCache]: Analyzing trace with hash -1787659419, now seen corresponding path program 1 times [2020-10-28 18:56:24,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:56:24,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [882568453] [2020-10-28 18:56:24,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:56:24,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:56:24,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:24,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:24,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:24,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:24,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:25,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:25,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:25,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:26,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:26,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:26,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:29,601 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:56:29,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-28 18:56:29,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 18:56:29,602 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 18:56:29,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:56:29,602 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:56:29,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:56:29,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 18:56:29,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-28 18:56:29,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:56:29,844 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-28 18:56:29,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:56:29,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:56:29,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:56:29,862 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:56:29,862 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:56:29,863 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:56:29,863 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 18:56:29,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:56:29,863 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:56:29,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:56:29,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:56:29,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:56:29,864 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:56:29,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:56:29,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [882568453] [2020-10-28 18:56:29,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:56:29,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 18:56:29,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735264519] [2020-10-28 18:56:29,880 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:56:29,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:56:29,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:56:29,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:56:29,882 INFO L87 Difference]: Start difference. First operand 25631 states and 37268 transitions. Second operand 6 states. [2020-10-28 18:56:30,105 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-28 18:56:32,157 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-28 18:56:32,596 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-28 18:56:51,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:56:51,705 INFO L93 Difference]: Finished difference Result 204309 states and 300428 transitions. [2020-10-28 18:56:51,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 18:56:51,706 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 64 [2020-10-28 18:56:51,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:56:52,147 INFO L225 Difference]: With dead ends: 204309 [2020-10-28 18:56:52,147 INFO L226 Difference]: Without dead ends: 180222 [2020-10-28 18:56:52,223 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-28 18:56:52,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180222 states. [2020-10-28 18:57:04,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180222 to 92847. [2020-10-28 18:57:04,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92847 states. [2020-10-28 18:57:04,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92847 states to 92847 states and 135809 transitions. [2020-10-28 18:57:04,897 INFO L78 Accepts]: Start accepts. Automaton has 92847 states and 135809 transitions. Word has length 64 [2020-10-28 18:57:04,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:57:04,897 INFO L481 AbstractCegarLoop]: Abstraction has 92847 states and 135809 transitions. [2020-10-28 18:57:04,897 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:57:04,897 INFO L276 IsEmpty]: Start isEmpty. Operand 92847 states and 135809 transitions. [2020-10-28 18:57:04,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-28 18:57:04,917 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:57:04,917 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:57:04,917 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 18:57:04,918 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:57:04,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:57:04,918 INFO L82 PathProgramCache]: Analyzing trace with hash -928924795, now seen corresponding path program 1 times [2020-10-28 18:57:04,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:57:04,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [332003032] [2020-10-28 18:57:04,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:57:04,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:57:04,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:04,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:05,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:05,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:05,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:05,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:05,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:06,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:06,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:06,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:06,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:07,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:07,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:07,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:08,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:09,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:57:09,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-28 18:57:09,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-28 18:57:09,941 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 18:57:09,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:57:09,941 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:57:09,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:57:09,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:57:09,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 18:57:09,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:57:10,158 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-28 18:57:10,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:57:10,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:57:10,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:10,186 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:57:10,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:57:10,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:57:10,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 18:57:10,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:57:10,187 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:57:10,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:57:10,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:57:10,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:57:10,188 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:57:10,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:57:10,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [332003032] [2020-10-28 18:57:10,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:57:10,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:57:10,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748804940] [2020-10-28 18:57:10,202 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:57:10,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:57:10,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:57:10,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:57:10,204 INFO L87 Difference]: Start difference. First operand 92847 states and 135809 transitions. Second operand 6 states. [2020-10-28 18:57:10,427 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2020-10-28 18:57:11,828 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-28 18:57:19,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:57:19,142 INFO L93 Difference]: Finished difference Result 143313 states and 210129 transitions. [2020-10-28 18:57:19,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 18:57:19,142 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 65 [2020-10-28 18:57:19,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:57:19,238 INFO L225 Difference]: With dead ends: 143313 [2020-10-28 18:57:19,239 INFO L226 Difference]: Without dead ends: 68072 [2020-10-28 18:57:19,331 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-28 18:57:19,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68072 states. [2020-10-28 18:57:27,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68072 to 67845. [2020-10-28 18:57:27,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67845 states. [2020-10-28 18:57:27,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67845 states to 67845 states and 99080 transitions. [2020-10-28 18:57:27,580 INFO L78 Accepts]: Start accepts. Automaton has 67845 states and 99080 transitions. Word has length 65 [2020-10-28 18:57:27,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:57:27,580 INFO L481 AbstractCegarLoop]: Abstraction has 67845 states and 99080 transitions. [2020-10-28 18:57:27,580 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:57:27,580 INFO L276 IsEmpty]: Start isEmpty. Operand 67845 states and 99080 transitions. [2020-10-28 18:57:27,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-28 18:57:27,593 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:57:27,593 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:57:27,593 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 18:57:27,594 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:57:27,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:57:27,594 INFO L82 PathProgramCache]: Analyzing trace with hash 961292226, now seen corresponding path program 1 times [2020-10-28 18:57:27,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:57:27,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [931941827] [2020-10-28 18:57:27,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:57:27,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:57:27,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:27,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:27,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:27,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:27,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:28,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:28,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:28,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:28,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:29,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:29,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:30,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:30,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:30,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:30,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:30,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:30,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:31,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:31,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:31,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:31,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:31,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:32,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:32,618 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:57:32,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-28 18:57:32,618 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 23 [2020-10-28 18:57:32,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 18:57:32,618 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:57:32,618 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:57:32,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:57:32,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:57:32,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 18:57:32,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:57:32,843 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-28 18:57:32,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:57:32,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:57:32,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:32,862 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:57:32,863 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:57:32,863 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:57:32,863 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 18:57:32,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:57:32,863 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:57:32,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:57:32,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:57:32,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:57:32,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:57:32,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:57:32,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [931941827] [2020-10-28 18:57:32,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:57:32,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:57:32,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740513541] [2020-10-28 18:57:32,873 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:57:32,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:57:32,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:57:32,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:57:32,873 INFO L87 Difference]: Start difference. First operand 67845 states and 99080 transitions. Second operand 6 states. [2020-10-28 18:57:33,115 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2020-10-28 18:57:34,232 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-28 18:57:39,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:57:39,654 INFO L93 Difference]: Finished difference Result 105244 states and 154139 transitions. [2020-10-28 18:57:39,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 18:57:39,655 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 65 [2020-10-28 18:57:39,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:57:39,718 INFO L225 Difference]: With dead ends: 105244 [2020-10-28 18:57:39,719 INFO L226 Difference]: Without dead ends: 49890 [2020-10-28 18:57:39,763 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-28 18:57:39,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49890 states. [2020-10-28 18:57:45,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49890 to 49731. [2020-10-28 18:57:45,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49731 states. [2020-10-28 18:57:45,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49731 states to 49731 states and 72581 transitions. [2020-10-28 18:57:45,737 INFO L78 Accepts]: Start accepts. Automaton has 49731 states and 72581 transitions. Word has length 65 [2020-10-28 18:57:45,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:57:45,737 INFO L481 AbstractCegarLoop]: Abstraction has 49731 states and 72581 transitions. [2020-10-28 18:57:45,737 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:57:45,737 INFO L276 IsEmpty]: Start isEmpty. Operand 49731 states and 72581 transitions. [2020-10-28 18:57:45,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-28 18:57:45,743 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:57:45,743 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:57:45,743 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 18:57:45,744 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:57:45,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:57:45,744 INFO L82 PathProgramCache]: Analyzing trace with hash -405617601, now seen corresponding path program 1 times [2020-10-28 18:57:45,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:57:45,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [557390709] [2020-10-28 18:57:45,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:57:45,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:57:45,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:45,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:45,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:45,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:46,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:46,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:46,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:46,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:46,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:46,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:47,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:47,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:47,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:47,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:47,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:48,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:48,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:48,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:48,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:48,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:48,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:49,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:49,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:49,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:50,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:57:50,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-28 18:57:50,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 24 [2020-10-28 18:57:50,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-28 18:57:50,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:57:50,771 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:57:50,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:57:50,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:57:50,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-28 18:57:50,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:57:50,987 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-28 18:57:50,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:57:50,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:57:50,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:51,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:57:51,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:57:51,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:57:51,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 18:57:51,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:57:51,012 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:57:51,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:57:51,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:57:51,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:57:51,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:57:51,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:57:51,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [557390709] [2020-10-28 18:57:51,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:57:51,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:57:51,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754373427] [2020-10-28 18:57:51,024 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:57:51,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:57:51,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:57:51,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:57:51,025 INFO L87 Difference]: Start difference. First operand 49731 states and 72581 transitions. Second operand 6 states. [2020-10-28 18:57:51,270 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-28 18:57:52,214 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-28 18:57:55,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:57:55,867 INFO L93 Difference]: Finished difference Result 70611 states and 103002 transitions. [2020-10-28 18:57:55,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 18:57:55,867 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 65 [2020-10-28 18:57:55,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:57:55,908 INFO L225 Difference]: With dead ends: 70611 [2020-10-28 18:57:55,908 INFO L226 Difference]: Without dead ends: 29699 [2020-10-28 18:57:55,938 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-28 18:57:55,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29699 states. [2020-10-28 18:57:59,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29699 to 29579. [2020-10-28 18:57:59,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29579 states. [2020-10-28 18:57:59,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29579 states to 29579 states and 42792 transitions. [2020-10-28 18:57:59,870 INFO L78 Accepts]: Start accepts. Automaton has 29579 states and 42792 transitions. Word has length 65 [2020-10-28 18:57:59,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:57:59,870 INFO L481 AbstractCegarLoop]: Abstraction has 29579 states and 42792 transitions. [2020-10-28 18:57:59,870 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:57:59,870 INFO L276 IsEmpty]: Start isEmpty. Operand 29579 states and 42792 transitions. [2020-10-28 18:57:59,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-28 18:57:59,873 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:57:59,873 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:57:59,873 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 18:57:59,874 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:57:59,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:57:59,874 INFO L82 PathProgramCache]: Analyzing trace with hash -2108483574, now seen corresponding path program 1 times [2020-10-28 18:57:59,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:57:59,874 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [766209484] [2020-10-28 18:57:59,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:57:59,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:57:59,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:57:59,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:00,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:00,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:00,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:00,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:01,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:01,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:01,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:01,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:01,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:03,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:03,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:03,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:03,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:03,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:04,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:58:04,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-28 18:58:04,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-28 18:58:04,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 18:58:04,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:58:04,900 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:58:04,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 18:58:04,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:58:04,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-28 18:58:04,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:58:05,356 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-28 18:58:05,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:58:05,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:58:05,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:05,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:58:05,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:58:05,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:58:05,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 18:58:05,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:58:05,382 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:58:05,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:58:05,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:58:05,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:58:05,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:58:05,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:58:05,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [766209484] [2020-10-28 18:58:05,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:58:05,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-28 18:58:05,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599372241] [2020-10-28 18:58:05,408 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 18:58:05,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:58:05,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 18:58:05,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2020-10-28 18:58:05,409 INFO L87 Difference]: Start difference. First operand 29579 states and 42792 transitions. Second operand 13 states. [2020-10-28 18:58:05,713 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-28 18:58:09,197 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-28 18:58:13,875 WARN L193 SmtUtils]: Spent 307.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-28 18:58:14,563 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 143