/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 13:46:04,827 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 13:46:04,830 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 13:46:04,871 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 13:46:04,871 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 13:46:04,873 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 13:46:04,874 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 13:46:04,877 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 13:46:04,879 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 13:46:04,880 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 13:46:04,881 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 13:46:04,883 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 13:46:04,883 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 13:46:04,884 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 13:46:04,885 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 13:46:04,887 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 13:46:04,888 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 13:46:04,889 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 13:46:04,899 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 13:46:04,903 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 13:46:04,907 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 13:46:04,908 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 13:46:04,909 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 13:46:04,910 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 13:46:04,913 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 13:46:04,914 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 13:46:04,914 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 13:46:04,915 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 13:46:04,916 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 13:46:04,917 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 13:46:04,917 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 13:46:04,918 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 13:46:04,919 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 13:46:04,920 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 13:46:04,921 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 13:46:04,921 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 13:46:04,922 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 13:46:04,922 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 13:46:04,922 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 13:46:04,923 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 13:46:04,924 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 13:46:04,925 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-29 13:46:04,952 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 13:46:04,953 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 13:46:04,954 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 13:46:04,954 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 13:46:04,954 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 13:46:04,955 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 13:46:04,955 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 13:46:04,955 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 13:46:04,955 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 13:46:04,955 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 13:46:04,956 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 13:46:04,956 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 13:46:04,956 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 13:46:04,956 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 13:46:04,956 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 13:46:04,957 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 13:46:04,957 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 13:46:04,957 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 13:46:04,957 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 13:46:04,957 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 13:46:04,958 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 13:46:04,958 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 13:46:04,958 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 13:46:04,958 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 13:46:04,958 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 13:46:04,959 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 13:46:04,959 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 13:46:04,959 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 13:46:04,959 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 13:46:04,959 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 13:46:05,386 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 13:46:05,414 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 13:46:05,418 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 13:46:05,419 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 13:46:05,420 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 13:46:05,422 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c [2020-10-29 13:46:05,502 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ebb8f010f/ba6e06648cee4a638d695a292ee98e81/FLAGfd5213419 [2020-10-29 13:46:06,478 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 13:46:06,480 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c [2020-10-29 13:46:06,539 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ebb8f010f/ba6e06648cee4a638d695a292ee98e81/FLAGfd5213419 [2020-10-29 13:46:06,964 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ebb8f010f/ba6e06648cee4a638d695a292ee98e81 [2020-10-29 13:46:06,967 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 13:46:06,976 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 13:46:06,978 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 13:46:06,978 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 13:46:06,982 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 13:46:06,983 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:46:06" (1/1) ... [2020-10-29 13:46:06,987 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@dc501ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:46:06, skipping insertion in model container [2020-10-29 13:46:06,988 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:46:06" (1/1) ... [2020-10-29 13:46:06,996 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 13:46:07,195 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 13:46:08,454 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:46:08,468 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 13:46:09,081 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:46:09,120 INFO L208 MainTranslator]: Completed translation [2020-10-29 13:46:09,120 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:46:09 WrapperNode [2020-10-29 13:46:09,121 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 13:46:09,122 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 13:46:09,122 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 13:46:09,123 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 13:46:09,138 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:46:09" (1/1) ... [2020-10-29 13:46:09,140 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:46:09" (1/1) ... [2020-10-29 13:46:09,220 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:46:09" (1/1) ... [2020-10-29 13:46:09,220 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:46:09" (1/1) ... [2020-10-29 13:46:09,310 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:46:09" (1/1) ... [2020-10-29 13:46:09,365 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:46:09" (1/1) ... [2020-10-29 13:46:09,390 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:46:09" (1/1) ... [2020-10-29 13:46:09,418 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 13:46:09,420 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 13:46:09,420 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 13:46:09,420 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 13:46:09,421 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:46:09" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 13:46:09,502 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 13:46:09,502 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 13:46:09,503 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 13:46:09,503 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-29 13:46:09,503 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 13:46:09,503 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 13:46:09,504 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 13:46:09,504 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 13:46:09,504 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 13:46:09,504 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-29 13:46:09,505 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-29 13:46:09,505 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-29 13:46:09,505 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-29 13:46:09,505 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-29 13:46:09,506 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-29 13:46:09,507 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-29 13:46:09,507 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-29 13:46:09,507 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-29 13:46:09,507 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-29 13:46:09,508 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-29 13:46:09,508 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-29 13:46:09,508 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-29 13:46:09,508 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 13:46:09,508 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 13:46:09,508 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 13:46:09,509 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 13:46:09,509 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 13:46:09,509 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 13:46:09,509 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 13:46:15,210 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 13:46:15,211 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-29 13:46:15,218 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:46:15 BoogieIcfgContainer [2020-10-29 13:46:15,218 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 13:46:15,220 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 13:46:15,220 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 13:46:15,224 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 13:46:15,224 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 01:46:06" (1/3) ... [2020-10-29 13:46:15,225 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7005bb86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:46:15, skipping insertion in model container [2020-10-29 13:46:15,225 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:46:09" (2/3) ... [2020-10-29 13:46:15,225 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7005bb86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:46:15, skipping insertion in model container [2020-10-29 13:46:15,225 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:46:15" (3/3) ... [2020-10-29 13:46:15,227 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+sep-reducer.c [2020-10-29 13:46:15,239 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 13:46:15,254 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 13:46:15,267 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 13:46:15,303 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 13:46:15,303 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 13:46:15,303 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 13:46:15,303 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 13:46:15,303 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 13:46:15,303 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 13:46:15,304 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 13:46:15,304 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 13:46:15,355 INFO L276 IsEmpty]: Start isEmpty. Operand 2038 states. [2020-10-29 13:46:15,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-29 13:46:15,385 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:46:15,386 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:46:15,386 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:46:15,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:46:15,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1330537411, now seen corresponding path program 1 times [2020-10-29 13:46:15,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:46:15,402 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1326602637] [2020-10-29 13:46:15,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:46:15,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:46:16,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:16,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:16,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:16,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:17,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:20,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:46:20,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-29 13:46:20,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 13:46:20,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-29 13:46:20,968 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:46:20,969 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:46:20,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:46:20,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:46:20,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-29 13:46:20,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 13:46:21,293 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 10 [2020-10-29 13:46:22,741 WARN L193 SmtUtils]: Spent 1.40 s on a formula simplification that was a NOOP. DAG size: 448 [2020-10-29 13:46:22,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:46:22,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:46:22,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:22,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:46:22,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:46:22,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:46:22,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 64 [2020-10-29 13:46:22,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:46:22,882 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:46:22,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:46:22,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:46:22,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:46:22,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:46:22,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:46:22,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1326602637] [2020-10-29 13:46:22,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:46:22,941 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:46:22,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507788351] [2020-10-29 13:46:22,946 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:46:22,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:46:22,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:46:22,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:46:22,963 INFO L87 Difference]: Start difference. First operand 2038 states. Second operand 6 states. [2020-10-29 13:46:24,395 WARN L193 SmtUtils]: Spent 1.31 s on a formula simplification that was a NOOP. DAG size: 457 [2020-10-29 13:46:40,874 WARN L193 SmtUtils]: Spent 1.33 s on a formula simplification that was a NOOP. DAG size: 455 [2020-10-29 13:46:41,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:46:41,548 INFO L93 Difference]: Finished difference Result 3342 states and 5879 transitions. [2020-10-29 13:46:41,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 13:46:41,550 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 69 [2020-10-29 13:46:41,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:46:41,583 INFO L225 Difference]: With dead ends: 3342 [2020-10-29 13:46:41,583 INFO L226 Difference]: Without dead ends: 2135 [2020-10-29 13:46:41,593 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:46:41,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2135 states. [2020-10-29 13:46:41,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2135 to 2123. [2020-10-29 13:46:41,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2123 states. [2020-10-29 13:46:41,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2123 states to 2123 states and 2855 transitions. [2020-10-29 13:46:41,778 INFO L78 Accepts]: Start accepts. Automaton has 2123 states and 2855 transitions. Word has length 69 [2020-10-29 13:46:41,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:46:41,779 INFO L481 AbstractCegarLoop]: Abstraction has 2123 states and 2855 transitions. [2020-10-29 13:46:41,779 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:46:41,779 INFO L276 IsEmpty]: Start isEmpty. Operand 2123 states and 2855 transitions. [2020-10-29 13:46:41,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-29 13:46:41,787 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:46:41,788 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:46:41,788 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 13:46:41,788 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:46:41,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:46:41,789 INFO L82 PathProgramCache]: Analyzing trace with hash -1750230333, now seen corresponding path program 1 times [2020-10-29 13:46:41,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:46:41,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [472091602] [2020-10-29 13:46:41,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:46:41,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:46:41,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:42,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:42,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:43,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:45,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:45,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:46,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:46:46,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-29 13:46:46,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 13:46:46,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-29 13:46:46,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:46:46,892 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:46:46,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:46:46,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:46:46,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-29 13:46:46,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:46:48,334 WARN L193 SmtUtils]: Spent 1.22 s on a formula simplification that was a NOOP. DAG size: 448 [2020-10-29 13:46:48,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:46:48,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:46:48,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:48,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:46:48,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:46:48,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:46:48,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-29 13:46:48,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:46:48,383 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:46:48,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:46:48,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:46:48,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:46:48,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:46:48,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:46:48,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [472091602] [2020-10-29 13:46:48,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:46:48,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-29 13:46:48,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643505087] [2020-10-29 13:46:48,434 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:46:48,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:46:48,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:46:48,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:46:48,436 INFO L87 Difference]: Start difference. First operand 2123 states and 2855 transitions. Second operand 9 states. [2020-10-29 13:46:49,915 WARN L193 SmtUtils]: Spent 1.31 s on a formula simplification that was a NOOP. DAG size: 455 [2020-10-29 13:47:01,622 WARN L193 SmtUtils]: Spent 1.31 s on a formula simplification that was a NOOP. DAG size: 457 [2020-10-29 13:47:05,017 WARN L193 SmtUtils]: Spent 1.29 s on a formula simplification that was a NOOP. DAG size: 456 [2020-10-29 13:47:05,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:47:05,869 INFO L93 Difference]: Finished difference Result 5826 states and 8057 transitions. [2020-10-29 13:47:05,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 13:47:05,870 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 70 [2020-10-29 13:47:05,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:47:05,891 INFO L225 Difference]: With dead ends: 5826 [2020-10-29 13:47:05,892 INFO L226 Difference]: Without dead ends: 4041 [2020-10-29 13:47:05,897 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2020-10-29 13:47:05,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4041 states. [2020-10-29 13:47:06,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4041 to 3241. [2020-10-29 13:47:06,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3241 states. [2020-10-29 13:47:06,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3241 states to 3241 states and 4363 transitions. [2020-10-29 13:47:06,078 INFO L78 Accepts]: Start accepts. Automaton has 3241 states and 4363 transitions. Word has length 70 [2020-10-29 13:47:06,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:47:06,079 INFO L481 AbstractCegarLoop]: Abstraction has 3241 states and 4363 transitions. [2020-10-29 13:47:06,079 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 13:47:06,079 INFO L276 IsEmpty]: Start isEmpty. Operand 3241 states and 4363 transitions. [2020-10-29 13:47:06,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-29 13:47:06,086 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:47:06,086 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:47:06,086 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 13:47:06,086 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:47:06,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:47:06,090 INFO L82 PathProgramCache]: Analyzing trace with hash -983688255, now seen corresponding path program 1 times [2020-10-29 13:47:06,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:47:06,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2038336868] [2020-10-29 13:47:06,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:47:06,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:47:06,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:47:06,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:47:06,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:47:06,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:47:06,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:47:07,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:47:07,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:47:07,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:47:09,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:47:09,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:47:09,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:47:10,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:47:10,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:47:11,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:47:11,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-29 13:47:11,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-29 13:47:11,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-29 13:47:11,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:47:11,153 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:47:11,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:47:11,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:47:11,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-29 13:47:11,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-29 13:47:12,771 WARN L193 SmtUtils]: Spent 1.38 s on a formula simplification that was a NOOP. DAG size: 448 [2020-10-29 13:47:12,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:47:12,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:47:12,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:47:12,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:47:12,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:47:12,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:47:12,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-29 13:47:12,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:47:12,816 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:47:12,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:47:12,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:47:12,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:47:12,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:47:12,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:47:12,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2038336868] [2020-10-29 13:47:12,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:47:12,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 13:47:12,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124965205] [2020-10-29 13:47:12,859 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:47:12,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:47:12,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:47:12,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:47:12,861 INFO L87 Difference]: Start difference. First operand 3241 states and 4363 transitions. Second operand 8 states. [2020-10-29 13:47:14,328 WARN L193 SmtUtils]: Spent 1.37 s on a formula simplification that was a NOOP. DAG size: 460 [2020-10-29 13:47:26,597 WARN L193 SmtUtils]: Spent 1.28 s on a formula simplification that was a NOOP. DAG size: 454 [2020-10-29 13:47:28,447 WARN L193 SmtUtils]: Spent 1.29 s on a formula simplification that was a NOOP. DAG size: 456 [2020-10-29 13:47:30,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:47:30,871 INFO L93 Difference]: Finished difference Result 4022 states and 5491 transitions. [2020-10-29 13:47:30,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 13:47:30,875 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 70 [2020-10-29 13:47:30,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:47:30,899 INFO L225 Difference]: With dead ends: 4022 [2020-10-29 13:47:30,899 INFO L226 Difference]: Without dead ends: 4016 [2020-10-29 13:47:30,901 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2020-10-29 13:47:30,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4016 states. [2020-10-29 13:47:31,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4016 to 3241. [2020-10-29 13:47:31,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3241 states. [2020-10-29 13:47:31,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3241 states to 3241 states and 4362 transitions. [2020-10-29 13:47:31,061 INFO L78 Accepts]: Start accepts. Automaton has 3241 states and 4362 transitions. Word has length 70 [2020-10-29 13:47:31,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:47:31,062 INFO L481 AbstractCegarLoop]: Abstraction has 3241 states and 4362 transitions. [2020-10-29 13:47:31,062 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:47:31,062 INFO L276 IsEmpty]: Start isEmpty. Operand 3241 states and 4362 transitions. [2020-10-29 13:47:31,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-29 13:47:31,069 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:47:31,069 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:47:31,069 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 13:47:31,070 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:47:31,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:47:31,070 INFO L82 PathProgramCache]: Analyzing trace with hash -2048492076, now seen corresponding path program 1 times [2020-10-29 13:47:31,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:47:31,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1175877582] [2020-10-29 13:47:31,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:47:31,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:47:31,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:47:31,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:47:31,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:47:31,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:47:31,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:47:32,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:47:32,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:47:33,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:47:36,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:47:36,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-29 13:47:36,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 13:47:36,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-29 13:47:36,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:47:36,141 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:47:36,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:47:36,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-29 13:47:36,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-29 13:47:36,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:47:37,493 WARN L193 SmtUtils]: Spent 1.25 s on a formula simplification that was a NOOP. DAG size: 448 [2020-10-29 13:47:37,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:47:37,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:47:37,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:47:37,533 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:47:37,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:47:37,534 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:47:37,534 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-29 13:47:37,534 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:47:37,538 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:47:37,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:47:37,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:47:37,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:47:37,539 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-29 13:47:37,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:47:37,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1175877582] [2020-10-29 13:47:37,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:47:37,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:47:37,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357399869] [2020-10-29 13:47:37,576 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:47:37,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:47:37,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:47:37,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:47:37,577 INFO L87 Difference]: Start difference. First operand 3241 states and 4362 transitions. Second operand 6 states. [2020-10-29 13:47:38,930 WARN L193 SmtUtils]: Spent 1.27 s on a formula simplification that was a NOOP. DAG size: 449 [2020-10-29 13:47:51,212 WARN L193 SmtUtils]: Spent 1.27 s on a formula simplification that was a NOOP. DAG size: 450 [2020-10-29 13:47:53,879 WARN L193 SmtUtils]: Spent 1.29 s on a formula simplification that was a NOOP. DAG size: 449 [2020-10-29 13:47:56,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:47:56,253 INFO L93 Difference]: Finished difference Result 10973 states and 15437 transitions. [2020-10-29 13:47:56,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 13:47:56,258 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 70 [2020-10-29 13:47:56,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:47:56,303 INFO L225 Difference]: With dead ends: 10973 [2020-10-29 13:47:56,304 INFO L226 Difference]: Without dead ends: 10306 [2020-10-29 13:47:56,309 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-29 13:47:56,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10306 states. [2020-10-29 13:47:56,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10306 to 8201. [2020-10-29 13:47:56,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8201 states. [2020-10-29 13:47:56,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8201 states to 8201 states and 11208 transitions. [2020-10-29 13:47:56,790 INFO L78 Accepts]: Start accepts. Automaton has 8201 states and 11208 transitions. Word has length 70 [2020-10-29 13:47:56,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:47:56,791 INFO L481 AbstractCegarLoop]: Abstraction has 8201 states and 11208 transitions. [2020-10-29 13:47:56,791 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:47:56,791 INFO L276 IsEmpty]: Start isEmpty. Operand 8201 states and 11208 transitions. [2020-10-29 13:47:56,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-29 13:47:56,806 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:47:56,806 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:47:56,806 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 13:47:56,806 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:47:56,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:47:56,807 INFO L82 PathProgramCache]: Analyzing trace with hash -647182703, now seen corresponding path program 1 times [2020-10-29 13:47:56,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:47:56,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1757827192] [2020-10-29 13:47:56,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:47:56,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:47:56,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:47:56,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:47:57,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:47:57,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:47:57,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:47:57,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:47:58,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:48:00,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:48:00,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:48:01,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:48:01,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:48:01,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:48:01,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:48:01,857 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:48:01,857 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-29 13:48:01,858 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-29 13:48:01,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-29 13:48:01,858 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:48:01,858 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:48:01,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:48:01,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:48:01,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-29 13:48:01,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:48:03,348 WARN L193 SmtUtils]: Spent 1.36 s on a formula simplification that was a NOOP. DAG size: 448 [2020-10-29 13:48:03,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:48:03,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:48:03,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:48:03,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:48:03,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:48:03,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:48:03,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 56 [2020-10-29 13:48:03,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:48:03,429 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:48:03,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:48:03,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:48:03,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:48:03,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:48:03,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:48:03,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1757827192] [2020-10-29 13:48:03,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:48:03,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:48:03,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944632666] [2020-10-29 13:48:03,466 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:48:03,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:48:03,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:48:03,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:48:03,467 INFO L87 Difference]: Start difference. First operand 8201 states and 11208 transitions. Second operand 6 states. [2020-10-29 13:48:04,852 WARN L193 SmtUtils]: Spent 1.30 s on a formula simplification that was a NOOP. DAG size: 456 [2020-10-29 13:48:15,057 WARN L193 SmtUtils]: Spent 1.28 s on a formula simplification that was a NOOP. DAG size: 454 [2020-10-29 13:48:17,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:48:17,124 INFO L93 Difference]: Finished difference Result 18649 states and 25729 transitions. [2020-10-29 13:48:17,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 13:48:17,124 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 71 [2020-10-29 13:48:17,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:48:17,165 INFO L225 Difference]: With dead ends: 18649 [2020-10-29 13:48:17,165 INFO L226 Difference]: Without dead ends: 12280 [2020-10-29 13:48:17,179 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-29 13:48:17,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12280 states. [2020-10-29 13:48:17,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12280 to 12271. [2020-10-29 13:48:17,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12271 states. [2020-10-29 13:48:17,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12271 states to 12271 states and 16724 transitions. [2020-10-29 13:48:17,805 INFO L78 Accepts]: Start accepts. Automaton has 12271 states and 16724 transitions. Word has length 71 [2020-10-29 13:48:17,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:48:17,805 INFO L481 AbstractCegarLoop]: Abstraction has 12271 states and 16724 transitions. [2020-10-29 13:48:17,805 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:48:17,805 INFO L276 IsEmpty]: Start isEmpty. Operand 12271 states and 16724 transitions. [2020-10-29 13:48:17,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-29 13:48:17,822 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:48:17,823 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:48:17,823 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 13:48:17,823 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:48:17,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:48:17,823 INFO L82 PathProgramCache]: Analyzing trace with hash -1754369719, now seen corresponding path program 1 times [2020-10-29 13:48:17,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:48:17,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [872366820] [2020-10-29 13:48:17,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:48:17,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:48:17,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:48:17,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:48:18,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:48:18,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:48:19,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:48:19,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:48:19,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:48:20,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:48:20,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:48:20,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:48:22,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:48:22,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-29 13:48:22,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-29 13:48:22,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-29 13:48:22,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:48:22,882 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:48:22,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:48:22,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:48:22,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-29 13:48:22,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:48:24,387 WARN L193 SmtUtils]: Spent 1.26 s on a formula simplification that was a NOOP. DAG size: 448 [2020-10-29 13:48:24,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:48:24,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:48:24,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:48:24,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:48:24,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:48:24,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:48:24,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 105 [2020-10-29 13:48:24,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:48:24,517 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:48:24,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:48:24,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:48:24,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:48:24,518 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:48:24,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:48:24,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [872366820] [2020-10-29 13:48:24,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:48:24,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 13:48:24,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771743426] [2020-10-29 13:48:24,563 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:48:24,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:48:24,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:48:24,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:48:24,564 INFO L87 Difference]: Start difference. First operand 12271 states and 16724 transitions. Second operand 9 states. [2020-10-29 13:48:25,935 WARN L193 SmtUtils]: Spent 1.27 s on a formula simplification that was a NOOP. DAG size: 452 [2020-10-29 13:48:39,480 WARN L193 SmtUtils]: Spent 1.32 s on a formula simplification that was a NOOP. DAG size: 455 [2020-10-29 13:48:44,013 WARN L193 SmtUtils]: Spent 1.32 s on a formula simplification that was a NOOP. DAG size: 454 [2020-10-29 13:48:45,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:48:45,558 INFO L93 Difference]: Finished difference Result 47736 states and 70766 transitions. [2020-10-29 13:48:45,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-29 13:48:45,559 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 71 [2020-10-29 13:48:45,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:48:45,654 INFO L225 Difference]: With dead ends: 47736 [2020-10-29 13:48:45,654 INFO L226 Difference]: Without dead ends: 43681 [2020-10-29 13:48:45,670 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=152, Invalid=448, Unknown=0, NotChecked=0, Total=600 [2020-10-29 13:48:45,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43681 states. [2020-10-29 13:48:47,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43681 to 12063. [2020-10-29 13:48:47,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12063 states. [2020-10-29 13:48:47,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12063 states to 12063 states and 16357 transitions. [2020-10-29 13:48:47,036 INFO L78 Accepts]: Start accepts. Automaton has 12063 states and 16357 transitions. Word has length 71 [2020-10-29 13:48:47,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:48:47,037 INFO L481 AbstractCegarLoop]: Abstraction has 12063 states and 16357 transitions. [2020-10-29 13:48:47,037 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 13:48:47,037 INFO L276 IsEmpty]: Start isEmpty. Operand 12063 states and 16357 transitions. [2020-10-29 13:48:47,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-29 13:48:47,057 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:48:47,057 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:48:47,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 13:48:47,057 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:48:47,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:48:47,058 INFO L82 PathProgramCache]: Analyzing trace with hash -1263452116, now seen corresponding path program 1 times [2020-10-29 13:48:47,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:48:47,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1444526368] [2020-10-29 13:48:47,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:48:47,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:48:47,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:48:47,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:48:47,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:48:47,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:48:50,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:48:50,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-29 13:48:50,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 13:48:50,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3534 [2020-10-29 13:48:50,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:48:50,651 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:48:50,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:48:50,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:48:50,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-29 13:48:50,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:48:52,084 WARN L193 SmtUtils]: Spent 1.23 s on a formula simplification that was a NOOP. DAG size: 448 [2020-10-29 13:48:52,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:48:52,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:48:52,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:48:52,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:48:52,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:48:52,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:48:52,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-29 13:48:52,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:48:52,127 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:48:52,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:48:52,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:48:52,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:48:52,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:48:52,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:48:52,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1444526368] [2020-10-29 13:48:52,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:48:52,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-29 13:48:52,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814464099] [2020-10-29 13:48:52,165 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:48:52,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:48:52,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:48:52,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:48:52,166 INFO L87 Difference]: Start difference. First operand 12063 states and 16357 transitions. Second operand 9 states. [2020-10-29 13:48:53,610 WARN L193 SmtUtils]: Spent 1.36 s on a formula simplification that was a NOOP. DAG size: 455 [2020-10-29 13:49:04,634 WARN L193 SmtUtils]: Spent 1.32 s on a formula simplification that was a NOOP. DAG size: 457 [2020-10-29 13:49:06,493 WARN L193 SmtUtils]: Spent 1.33 s on a formula simplification that was a NOOP. DAG size: 458 [2020-10-29 13:49:09,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:49:09,203 INFO L93 Difference]: Finished difference Result 23639 states and 34230 transitions. [2020-10-29 13:49:09,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 13:49:09,204 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 72 [2020-10-29 13:49:09,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:49:09,244 INFO L225 Difference]: With dead ends: 23639 [2020-10-29 13:49:09,245 INFO L226 Difference]: Without dead ends: 22441 [2020-10-29 13:49:09,253 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2020-10-29 13:49:09,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22441 states. [2020-10-29 13:49:10,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22441 to 10676. [2020-10-29 13:49:10,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10676 states. [2020-10-29 13:49:10,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10676 states to 10676 states and 14587 transitions. [2020-10-29 13:49:10,352 INFO L78 Accepts]: Start accepts. Automaton has 10676 states and 14587 transitions. Word has length 72 [2020-10-29 13:49:10,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:49:10,352 INFO L481 AbstractCegarLoop]: Abstraction has 10676 states and 14587 transitions. [2020-10-29 13:49:10,352 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 13:49:10,352 INFO L276 IsEmpty]: Start isEmpty. Operand 10676 states and 14587 transitions. [2020-10-29 13:49:10,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-29 13:49:10,364 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:49:10,364 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:49:10,364 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 13:49:10,365 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:49:10,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:49:10,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1441564322, now seen corresponding path program 1 times [2020-10-29 13:49:10,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:49:10,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1823317276] [2020-10-29 13:49:10,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:49:10,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:49:10,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:49:10,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:49:10,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:49:11,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:49:11,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:49:12,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:49:12,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:49:12,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:49:12,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:49:13,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:49:13,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:49:13,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:49:15,431 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:49:15,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-29 13:49:15,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-29 13:49:15,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-29 13:49:15,432 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:49:15,432 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:49:15,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:49:15,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 13:49:15,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-29 13:49:15,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:49:16,765 WARN L193 SmtUtils]: Spent 1.24 s on a formula simplification that was a NOOP. DAG size: 448 [2020-10-29 13:49:16,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:49:16,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:49:16,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:49:16,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:49:16,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:49:16,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:49:16,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-29 13:49:16,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:49:16,800 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:49:16,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:49:16,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:49:16,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:49:16,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:49:16,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:49:16,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1823317276] [2020-10-29 13:49:16,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:49:16,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:49:16,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745782805] [2020-10-29 13:49:16,823 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:49:16,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:49:16,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:49:16,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:49:16,824 INFO L87 Difference]: Start difference. First operand 10676 states and 14587 transitions. Second operand 6 states. [2020-10-29 13:49:18,199 WARN L193 SmtUtils]: Spent 1.29 s on a formula simplification that was a NOOP. DAG size: 449 [2020-10-29 13:49:29,593 WARN L193 SmtUtils]: Spent 1.27 s on a formula simplification that was a NOOP. DAG size: 450 [2020-10-29 13:49:31,770 WARN L193 SmtUtils]: Spent 1.32 s on a formula simplification that was a NOOP. DAG size: 449 [2020-10-29 13:49:35,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:49:35,138 INFO L93 Difference]: Finished difference Result 28452 states and 41527 transitions. [2020-10-29 13:49:35,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 13:49:35,138 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 72 [2020-10-29 13:49:35,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:49:35,178 INFO L225 Difference]: With dead ends: 28452 [2020-10-29 13:49:35,178 INFO L226 Difference]: Without dead ends: 24952 [2020-10-29 13:49:35,189 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-29 13:49:35,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24952 states. [2020-10-29 13:49:36,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24952 to 13617. [2020-10-29 13:49:36,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13617 states. [2020-10-29 13:49:36,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13617 states to 13617 states and 18627 transitions. [2020-10-29 13:49:36,490 INFO L78 Accepts]: Start accepts. Automaton has 13617 states and 18627 transitions. Word has length 72 [2020-10-29 13:49:36,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:49:36,490 INFO L481 AbstractCegarLoop]: Abstraction has 13617 states and 18627 transitions. [2020-10-29 13:49:36,490 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:49:36,491 INFO L276 IsEmpty]: Start isEmpty. Operand 13617 states and 18627 transitions. [2020-10-29 13:49:36,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-29 13:49:36,502 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:49:36,502 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:49:36,502 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 13:49:36,502 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:49:36,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:49:36,503 INFO L82 PathProgramCache]: Analyzing trace with hash 518830917, now seen corresponding path program 1 times [2020-10-29 13:49:36,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:49:36,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1813343775] [2020-10-29 13:49:36,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:49:36,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:49:36,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:49:36,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:49:36,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:49:36,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:49:37,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:49:37,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:49:39,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:49:39,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:49:40,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking...