/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+sep-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 13:38:21,010 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 13:38:21,013 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 13:38:21,053 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 13:38:21,054 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 13:38:21,061 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 13:38:21,064 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 13:38:21,069 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 13:38:21,072 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 13:38:21,080 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 13:38:21,082 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 13:38:21,083 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 13:38:21,084 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 13:38:21,087 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 13:38:21,089 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 13:38:21,090 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 13:38:21,091 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 13:38:21,092 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 13:38:21,095 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 13:38:21,097 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 13:38:21,099 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 13:38:21,101 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 13:38:21,102 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 13:38:21,103 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 13:38:21,106 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 13:38:21,107 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 13:38:21,107 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 13:38:21,108 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 13:38:21,109 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 13:38:21,110 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 13:38:21,111 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 13:38:21,112 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 13:38:21,113 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 13:38:21,114 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 13:38:21,115 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 13:38:21,115 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 13:38:21,130 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 13:38:21,130 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 13:38:21,131 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 13:38:21,133 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 13:38:21,134 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 13:38:21,135 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 13:38:21,189 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 13:38:21,189 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 13:38:21,195 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 13:38:21,195 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 13:38:21,195 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 13:38:21,196 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 13:38:21,196 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 13:38:21,196 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 13:38:21,196 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 13:38:21,196 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 13:38:21,198 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 13:38:21,198 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 13:38:21,199 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 13:38:21,199 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 13:38:21,199 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 13:38:21,199 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 13:38:21,199 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 13:38:21,200 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 13:38:21,200 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 13:38:21,200 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 13:38:21,200 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 13:38:21,201 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 13:38:21,201 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 13:38:21,202 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 13:38:21,202 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 13:38:21,202 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 13:38:21,202 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 13:38:21,202 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 13:38:21,203 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 13:38:21,203 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 13:38:21,625 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 13:38:21,657 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 13:38:21,661 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 13:38:21,662 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 13:38:21,663 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 13:38:21,664 INFO L432 ainManager$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.3.2.ufo.BOUNDED-6.pals.c.v+sep-reducer.c [2020-10-29 13:38:21,750 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/73b446faa/a9c30c11a8c34ede87bcfaaf21e62824/FLAGe0a7abcd5 [2020-10-29 13:38:22,874 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 13:38:22,875 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+sep-reducer.c [2020-10-29 13:38:22,914 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/73b446faa/a9c30c11a8c34ede87bcfaaf21e62824/FLAGe0a7abcd5 [2020-10-29 13:38:23,362 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/73b446faa/a9c30c11a8c34ede87bcfaaf21e62824 [2020-10-29 13:38:23,365 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 13:38:23,374 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 13:38:23,378 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 13:38:23,379 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 13:38:23,383 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 13:38:23,384 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:38:23" (1/1) ... [2020-10-29 13:38:23,389 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48b921e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:38:23, skipping insertion in model container [2020-10-29 13:38:23,390 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:38:23" (1/1) ... [2020-10-29 13:38:23,399 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 13:38:23,551 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 13:38:24,460 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:38:24,482 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 13:38:24,893 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:38:24,934 INFO L208 MainTranslator]: Completed translation [2020-10-29 13:38:24,936 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:38:24 WrapperNode [2020-10-29 13:38:24,936 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 13:38:24,937 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 13:38:24,937 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 13:38:24,937 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 13:38:24,953 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:38:24" (1/1) ... [2020-10-29 13:38:24,955 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:38:24" (1/1) ... [2020-10-29 13:38:25,020 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:38:24" (1/1) ... [2020-10-29 13:38:25,020 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:38:24" (1/1) ... [2020-10-29 13:38:25,094 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:38:24" (1/1) ... [2020-10-29 13:38:25,137 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:38:24" (1/1) ... [2020-10-29 13:38:25,152 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:38:24" (1/1) ... [2020-10-29 13:38:25,244 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 13:38:25,245 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 13:38:25,245 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 13:38:25,245 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 13:38:25,246 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:38:24" (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 13:38:25,322 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 13:38:25,322 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 13:38:25,322 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 13:38:25,323 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-29 13:38:25,323 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 13:38:25,323 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 13:38:25,323 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 13:38:25,323 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 13:38:25,323 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 13:38:25,324 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-29 13:38:25,324 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-29 13:38:25,324 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-29 13:38:25,324 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-29 13:38:25,324 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-29 13:38:25,324 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-29 13:38:25,325 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-29 13:38:25,325 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-29 13:38:25,325 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-29 13:38:25,325 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-29 13:38:25,325 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-29 13:38:25,325 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 13:38:25,325 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 13:38:25,326 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 13:38:25,326 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 13:38:25,326 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 13:38:25,326 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 13:38:25,326 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 13:38:29,442 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 13:38:29,443 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-29 13:38:29,450 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:38:29 BoogieIcfgContainer [2020-10-29 13:38:29,450 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 13:38:29,454 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 13:38:29,454 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 13:38:29,458 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 13:38:29,458 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 01:38:23" (1/3) ... [2020-10-29 13:38:29,459 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@542df0a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:38:29, skipping insertion in model container [2020-10-29 13:38:29,459 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:38:24" (2/3) ... [2020-10-29 13:38:29,460 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@542df0a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:38:29, skipping insertion in model container [2020-10-29 13:38:29,460 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:38:29" (3/3) ... [2020-10-29 13:38:29,462 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.2.ufo.BOUNDED-6.pals.c.v+sep-reducer.c [2020-10-29 13:38:29,475 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 13:38:29,482 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 13:38:29,495 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 13:38:29,542 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 13:38:29,542 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 13:38:29,542 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 13:38:29,543 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 13:38:29,543 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 13:38:29,543 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 13:38:29,543 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 13:38:29,543 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 13:38:29,585 INFO L276 IsEmpty]: Start isEmpty. Operand 1199 states. [2020-10-29 13:38:29,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-29 13:38:29,608 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:38:29,609 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:38:29,610 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:38:29,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:38:29,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1515842327, now seen corresponding path program 1 times [2020-10-29 13:38:29,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:38:29,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1570934625] [2020-10-29 13:38:29,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:38:30,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:38:30,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:30,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:31,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:31,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:31,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:32,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:33,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:35,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:38:35,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-29 13:38:35,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 13:38:35,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-10-29 13:38:35,135 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:38:35,135 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:38:35,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:38:35,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 13:38:35,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-29 13:38:35,136 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 13:38:37,232 WARN L193 SmtUtils]: Spent 1.85 s on a formula simplification that was a NOOP. DAG size: 535 [2020-10-29 13:38:37,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:38:37,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:38:37,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:37,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:38:37,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:38:37,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:38:37,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-29 13:38:37,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:38:37,289 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:38:37,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:38:37,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:38:37,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:38:37,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:38:37,343 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 13:38:37,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1570934625] [2020-10-29 13:38:37,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:38:37,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:38:37,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998565656] [2020-10-29 13:38:37,352 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:38:37,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:38:37,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:38:37,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:38:37,370 INFO L87 Difference]: Start difference. First operand 1199 states. Second operand 6 states. [2020-10-29 13:38:39,541 WARN L193 SmtUtils]: Spent 1.93 s on a formula simplification that was a NOOP. DAG size: 536 [2020-10-29 13:38:50,764 WARN L193 SmtUtils]: Spent 1.87 s on a formula simplification that was a NOOP. DAG size: 537 [2020-10-29 13:38:55,785 WARN L193 SmtUtils]: Spent 1.96 s on a formula simplification that was a NOOP. DAG size: 536 [2020-10-29 13:38:56,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:38:56,219 INFO L93 Difference]: Finished difference Result 2160 states and 3672 transitions. [2020-10-29 13:38:56,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 13:38:56,229 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 57 [2020-10-29 13:38:56,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:38:56,276 INFO L225 Difference]: With dead ends: 2160 [2020-10-29 13:38:56,277 INFO L226 Difference]: Without dead ends: 1712 [2020-10-29 13:38:56,285 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-29 13:38:56,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1712 states. [2020-10-29 13:38:56,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1712 to 1557. [2020-10-29 13:38:56,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1557 states. [2020-10-29 13:38:56,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1557 states to 1557 states and 2051 transitions. [2020-10-29 13:38:56,463 INFO L78 Accepts]: Start accepts. Automaton has 1557 states and 2051 transitions. Word has length 57 [2020-10-29 13:38:56,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:38:56,464 INFO L481 AbstractCegarLoop]: Abstraction has 1557 states and 2051 transitions. [2020-10-29 13:38:56,464 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:38:56,465 INFO L276 IsEmpty]: Start isEmpty. Operand 1557 states and 2051 transitions. [2020-10-29 13:38:56,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-29 13:38:56,470 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:38:56,470 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:38:56,470 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 13:38:56,471 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:38:56,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:38:56,472 INFO L82 PathProgramCache]: Analyzing trace with hash -474545896, now seen corresponding path program 1 times [2020-10-29 13:38:56,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:38:56,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [990383506] [2020-10-29 13:38:56,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:38:56,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:38:56,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:56,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:57,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:57,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:58,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:38:58,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:00,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:00,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:01,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:01,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:39:01,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-29 13:39:01,614 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 13:39:01,614 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5069 [2020-10-29 13:39:01,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:39:01,615 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:39:01,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:39:01,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:39:01,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-29 13:39:01,615 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:39:03,685 WARN L193 SmtUtils]: Spent 1.83 s on a formula simplification that was a NOOP. DAG size: 535 [2020-10-29 13:39:03,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:39:03,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:39:03,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:03,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:39:03,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:39:03,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:39:03,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-29 13:39:03,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:39:03,731 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:39:03,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:39:03,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:39:03,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:39:03,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:39:03,769 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 13:39:03,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [990383506] [2020-10-29 13:39:03,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:39:03,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-29 13:39:03,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225794280] [2020-10-29 13:39:03,771 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:39:03,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:39:03,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:39:03,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:39:03,773 INFO L87 Difference]: Start difference. First operand 1557 states and 2051 transitions. Second operand 9 states. [2020-10-29 13:39:05,803 WARN L193 SmtUtils]: Spent 1.92 s on a formula simplification that was a NOOP. DAG size: 543 [2020-10-29 13:39:14,056 WARN L193 SmtUtils]: Spent 1.97 s on a formula simplification that was a NOOP. DAG size: 545 [2020-10-29 13:39:19,259 WARN L193 SmtUtils]: Spent 1.87 s on a formula simplification that was a NOOP. DAG size: 541 [2020-10-29 13:39:21,499 WARN L193 SmtUtils]: Spent 1.93 s on a formula simplification that was a NOOP. DAG size: 547 [2020-10-29 13:39:22,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:39:22,758 INFO L93 Difference]: Finished difference Result 4049 states and 5671 transitions. [2020-10-29 13:39:22,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-29 13:39:22,758 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 57 [2020-10-29 13:39:22,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:39:22,778 INFO L225 Difference]: With dead ends: 4049 [2020-10-29 13:39:22,778 INFO L226 Difference]: Without dead ends: 3789 [2020-10-29 13:39:22,783 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2020-10-29 13:39:22,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3789 states. [2020-10-29 13:39:22,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3789 to 1529. [2020-10-29 13:39:22,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1529 states. [2020-10-29 13:39:22,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1529 states to 1529 states and 2010 transitions. [2020-10-29 13:39:22,906 INFO L78 Accepts]: Start accepts. Automaton has 1529 states and 2010 transitions. Word has length 57 [2020-10-29 13:39:22,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:39:22,906 INFO L481 AbstractCegarLoop]: Abstraction has 1529 states and 2010 transitions. [2020-10-29 13:39:22,906 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 13:39:22,906 INFO L276 IsEmpty]: Start isEmpty. Operand 1529 states and 2010 transitions. [2020-10-29 13:39:22,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-29 13:39:22,909 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:39:22,910 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:39:22,910 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 13:39:22,910 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:39:22,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:39:22,911 INFO L82 PathProgramCache]: Analyzing trace with hash -1354919180, now seen corresponding path program 1 times [2020-10-29 13:39:22,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:39:22,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [691475198] [2020-10-29 13:39:22,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:39:22,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:39:23,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:23,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:23,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:23,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:25,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:26,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:26,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:27,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:28,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:39:28,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-29 13:39:28,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 13:39:28,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5037 [2020-10-29 13:39:28,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:39:28,009 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:39:28,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:39:28,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:39:28,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-29 13:39:28,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:39:30,125 WARN L193 SmtUtils]: Spent 1.85 s on a formula simplification that was a NOOP. DAG size: 535 [2020-10-29 13:39:30,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:39:30,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:39:30,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:30,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:39:30,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:39:30,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:39:30,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-29 13:39:30,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:39:30,169 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:39:30,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:39:30,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:39:30,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:39:30,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:39:30,206 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 13:39:30,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [691475198] [2020-10-29 13:39:30,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:39:30,206 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 13:39:30,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53638549] [2020-10-29 13:39:30,207 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:39:30,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:39:30,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:39:30,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:39:30,208 INFO L87 Difference]: Start difference. First operand 1529 states and 2010 transitions. Second operand 8 states. [2020-10-29 13:39:32,330 WARN L193 SmtUtils]: Spent 1.99 s on a formula simplification that was a NOOP. DAG size: 551 [2020-10-29 13:39:40,047 WARN L193 SmtUtils]: Spent 1.98 s on a formula simplification that was a NOOP. DAG size: 550 [2020-10-29 13:39:42,769 WARN L193 SmtUtils]: Spent 1.89 s on a formula simplification that was a NOOP. DAG size: 541 [2020-10-29 13:39:44,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:39:44,497 INFO L93 Difference]: Finished difference Result 3199 states and 4521 transitions. [2020-10-29 13:39:44,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 13:39:44,497 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 57 [2020-10-29 13:39:44,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:39:44,512 INFO L225 Difference]: With dead ends: 3199 [2020-10-29 13:39:44,512 INFO L226 Difference]: Without dead ends: 2936 [2020-10-29 13:39:44,514 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-10-29 13:39:44,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2936 states. [2020-10-29 13:39:44,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2936 to 1527. [2020-10-29 13:39:44,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1527 states. [2020-10-29 13:39:44,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1527 states to 1527 states and 2007 transitions. [2020-10-29 13:39:44,664 INFO L78 Accepts]: Start accepts. Automaton has 1527 states and 2007 transitions. Word has length 57 [2020-10-29 13:39:44,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:39:44,665 INFO L481 AbstractCegarLoop]: Abstraction has 1527 states and 2007 transitions. [2020-10-29 13:39:44,665 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:39:44,667 INFO L276 IsEmpty]: Start isEmpty. Operand 1527 states and 2007 transitions. [2020-10-29 13:39:44,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-29 13:39:44,670 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:39:44,670 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] [2020-10-29 13:39:44,670 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 13:39:44,670 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:39:44,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:39:44,671 INFO L82 PathProgramCache]: Analyzing trace with hash 578090790, now seen corresponding path program 1 times [2020-10-29 13:39:44,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:39:44,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1316763258] [2020-10-29 13:39:44,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:39:44,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:39:44,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:44,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:44,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:45,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:45,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:46,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:46,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:47,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:47,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:47,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:47,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:49,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:49,762 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:39:49,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-29 13:39:49,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-29 13:39:49,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-29 13:39:49,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:39:49,764 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:39:49,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:39:49,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:39:49,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-29 13:39:49,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 13:39:51,867 WARN L193 SmtUtils]: Spent 1.92 s on a formula simplification that was a NOOP. DAG size: 535 [2020-10-29 13:39:51,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:39:51,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:39:51,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:39:51,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:39:51,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:39:51,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:39:51,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 51 [2020-10-29 13:39:51,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:39:51,948 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:39:51,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:39:51,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:39:51,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:39:51,948 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:39:51,986 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 13:39:51,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1316763258] [2020-10-29 13:39:51,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:39:51,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:39:51,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50765069] [2020-10-29 13:39:51,987 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:39:51,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:39:51,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:39:51,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:39:51,988 INFO L87 Difference]: Start difference. First operand 1527 states and 2007 transitions. Second operand 6 states. [2020-10-29 13:39:53,913 WARN L193 SmtUtils]: Spent 1.83 s on a formula simplification that was a NOOP. DAG size: 541 [2020-10-29 13:40:01,363 WARN L193 SmtUtils]: Spent 1.89 s on a formula simplification that was a NOOP. DAG size: 540 [2020-10-29 13:40:02,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:40:02,505 INFO L93 Difference]: Finished difference Result 3022 states and 4039 transitions. [2020-10-29 13:40:02,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 13:40:02,505 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 58 [2020-10-29 13:40:02,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:40:02,514 INFO L225 Difference]: With dead ends: 3022 [2020-10-29 13:40:02,515 INFO L226 Difference]: Without dead ends: 1912 [2020-10-29 13:40:02,518 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-29 13:40:02,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1912 states. [2020-10-29 13:40:02,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1912 to 1899. [2020-10-29 13:40:02,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1899 states. [2020-10-29 13:40:02,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1899 states to 1899 states and 2537 transitions. [2020-10-29 13:40:02,673 INFO L78 Accepts]: Start accepts. Automaton has 1899 states and 2537 transitions. Word has length 58 [2020-10-29 13:40:02,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:40:02,674 INFO L481 AbstractCegarLoop]: Abstraction has 1899 states and 2537 transitions. [2020-10-29 13:40:02,674 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:40:02,674 INFO L276 IsEmpty]: Start isEmpty. Operand 1899 states and 2537 transitions. [2020-10-29 13:40:02,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-29 13:40:02,677 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:40:02,677 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:40:02,678 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 13:40:02,678 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:40:02,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:40:02,678 INFO L82 PathProgramCache]: Analyzing trace with hash -1839337768, now seen corresponding path program 1 times [2020-10-29 13:40:02,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:40:02,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2042557838] [2020-10-29 13:40:02,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:40:02,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:40:02,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:02,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:02,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:03,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:03,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:03,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:04,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:05,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:05,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:05,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:07,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:07,729 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:40:07,729 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-29 13:40:07,729 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-29 13:40:07,729 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-29 13:40:07,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:40:07,730 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:40:07,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:40:07,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:40:07,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-29 13:40:07,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:40:09,816 WARN L193 SmtUtils]: Spent 1.84 s on a formula simplification that was a NOOP. DAG size: 535 [2020-10-29 13:40:09,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:40:09,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:40:09,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:09,863 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:40:09,863 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:40:09,863 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:40:09,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-29 13:40:09,864 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:40:09,864 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:40:09,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:40:09,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:40:09,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:40:09,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:40:09,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:40:09,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2042557838] [2020-10-29 13:40:09,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:40:09,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-29 13:40:09,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801270561] [2020-10-29 13:40:09,907 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:40:09,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:40:09,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:40:09,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:40:09,908 INFO L87 Difference]: Start difference. First operand 1899 states and 2537 transitions. Second operand 9 states. [2020-10-29 13:40:11,998 WARN L193 SmtUtils]: Spent 1.97 s on a formula simplification that was a NOOP. DAG size: 547 [2020-10-29 13:40:19,935 WARN L193 SmtUtils]: Spent 1.94 s on a formula simplification that was a NOOP. DAG size: 549 [2020-10-29 13:40:24,155 WARN L193 SmtUtils]: Spent 1.92 s on a formula simplification that was a NOOP. DAG size: 546 [2020-10-29 13:40:26,294 WARN L193 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 551 [2020-10-29 13:40:27,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:40:27,204 INFO L93 Difference]: Finished difference Result 4553 states and 6320 transitions. [2020-10-29 13:40:27,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 13:40:27,205 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 59 [2020-10-29 13:40:27,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:40:27,224 INFO L225 Difference]: With dead ends: 4553 [2020-10-29 13:40:27,225 INFO L226 Difference]: Without dead ends: 4545 [2020-10-29 13:40:27,226 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2020-10-29 13:40:27,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4545 states. [2020-10-29 13:40:27,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4545 to 1897. [2020-10-29 13:40:27,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1897 states. [2020-10-29 13:40:27,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1897 states to 1897 states and 2534 transitions. [2020-10-29 13:40:27,450 INFO L78 Accepts]: Start accepts. Automaton has 1897 states and 2534 transitions. Word has length 59 [2020-10-29 13:40:27,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:40:27,451 INFO L481 AbstractCegarLoop]: Abstraction has 1897 states and 2534 transitions. [2020-10-29 13:40:27,451 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 13:40:27,451 INFO L276 IsEmpty]: Start isEmpty. Operand 1897 states and 2534 transitions. [2020-10-29 13:40:27,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-29 13:40:27,454 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:40:27,454 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:40:27,455 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 13:40:27,455 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:40:27,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:40:27,455 INFO L82 PathProgramCache]: Analyzing trace with hash -2030479084, now seen corresponding path program 1 times [2020-10-29 13:40:27,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:40:27,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1356021772] [2020-10-29 13:40:27,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:40:27,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:40:27,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:27,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:27,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:28,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:28,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:28,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:28,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:29,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:29,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:30,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:32,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:40:32,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-29 13:40:32,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-29 13:40:32,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-29 13:40:32,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:40:32,524 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:40:32,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:40:32,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:40:32,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-29 13:40:32,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:40:34,643 WARN L193 SmtUtils]: Spent 1.84 s on a formula simplification that was a NOOP. DAG size: 535 [2020-10-29 13:40:34,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:40:34,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:40:34,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:34,672 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:40:34,672 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:40:34,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:40:34,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-29 13:40:34,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:40:34,673 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:40:34,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:40:34,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:40:34,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:40:34,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:40:34,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:40:34,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1356021772] [2020-10-29 13:40:34,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:40:34,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 13:40:34,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472074118] [2020-10-29 13:40:34,705 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:40:34,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:40:34,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:40:34,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:40:34,706 INFO L87 Difference]: Start difference. First operand 1897 states and 2534 transitions. Second operand 8 states. [2020-10-29 13:40:36,796 WARN L193 SmtUtils]: Spent 1.97 s on a formula simplification that was a NOOP. DAG size: 550 [2020-10-29 13:40:45,432 WARN L193 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 551 [2020-10-29 13:40:47,730 WARN L193 SmtUtils]: Spent 1.93 s on a formula simplification that was a NOOP. DAG size: 540 [2020-10-29 13:40:49,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:40:49,529 INFO L93 Difference]: Finished difference Result 3868 states and 5510 transitions. [2020-10-29 13:40:49,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 13:40:49,530 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 59 [2020-10-29 13:40:49,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:40:49,545 INFO L225 Difference]: With dead ends: 3868 [2020-10-29 13:40:49,545 INFO L226 Difference]: Without dead ends: 3293 [2020-10-29 13:40:49,548 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-10-29 13:40:49,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3293 states. [2020-10-29 13:40:49,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3293 to 1783. [2020-10-29 13:40:49,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1783 states. [2020-10-29 13:40:49,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1783 states to 1783 states and 2371 transitions. [2020-10-29 13:40:49,778 INFO L78 Accepts]: Start accepts. Automaton has 1783 states and 2371 transitions. Word has length 59 [2020-10-29 13:40:49,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:40:49,779 INFO L481 AbstractCegarLoop]: Abstraction has 1783 states and 2371 transitions. [2020-10-29 13:40:49,779 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:40:49,779 INFO L276 IsEmpty]: Start isEmpty. Operand 1783 states and 2371 transitions. [2020-10-29 13:40:49,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-29 13:40:49,783 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:40:49,783 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] [2020-10-29 13:40:49,783 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 13:40:49,783 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:40:49,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:40:49,784 INFO L82 PathProgramCache]: Analyzing trace with hash -938517274, now seen corresponding path program 1 times [2020-10-29 13:40:49,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:40:49,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1440640016] [2020-10-29 13:40:49,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:40:49,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:40:49,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:49,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:50,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:50,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:52,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:52,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:52,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:54,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:54,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:54,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:40:54,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-29 13:40:54,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 13:40:54,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-29 13:40:54,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:40:54,843 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:40:54,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:40:54,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:40:54,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-29 13:40:54,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:40:56,883 WARN L193 SmtUtils]: Spent 1.90 s on a formula simplification that was a NOOP. DAG size: 535 [2020-10-29 13:40:56,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:40:56,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:40:56,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:40:56,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:40:56,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:40:56,913 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:40:56,913 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-29 13:40:56,913 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:40:56,914 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:40:56,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:40:56,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:40:56,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:40:56,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:40:56,938 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 13:40:56,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1440640016] [2020-10-29 13:40:56,938 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:40:56,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 13:40:56,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693825463] [2020-10-29 13:40:56,939 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:40:56,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:40:56,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:40:56,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:40:56,940 INFO L87 Difference]: Start difference. First operand 1783 states and 2371 transitions. Second operand 8 states. [2020-10-29 13:40:59,037 WARN L193 SmtUtils]: Spent 1.97 s on a formula simplification that was a NOOP. DAG size: 547 [2020-10-29 13:41:08,706 WARN L193 SmtUtils]: Spent 1.91 s on a formula simplification that was a NOOP. DAG size: 543 [2020-10-29 13:41:11,552 WARN L193 SmtUtils]: Spent 1.91 s on a formula simplification that was a NOOP. DAG size: 541 [2020-10-29 13:41:14,014 WARN L193 SmtUtils]: Spent 1.95 s on a formula simplification that was a NOOP. DAG size: 545 [2020-10-29 13:41:14,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:41:14,646 INFO L93 Difference]: Finished difference Result 2602 states and 3575 transitions. [2020-10-29 13:41:14,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 13:41:14,651 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 61 [2020-10-29 13:41:14,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:41:14,661 INFO L225 Difference]: With dead ends: 2602 [2020-10-29 13:41:14,661 INFO L226 Difference]: Without dead ends: 2354 [2020-10-29 13:41:14,663 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2020-10-29 13:41:14,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2354 states. [2020-10-29 13:41:14,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2354 to 2021. [2020-10-29 13:41:14,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2021 states. [2020-10-29 13:41:14,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2021 states to 2021 states and 2729 transitions. [2020-10-29 13:41:14,929 INFO L78 Accepts]: Start accepts. Automaton has 2021 states and 2729 transitions. Word has length 61 [2020-10-29 13:41:14,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:41:14,929 INFO L481 AbstractCegarLoop]: Abstraction has 2021 states and 2729 transitions. [2020-10-29 13:41:14,929 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:41:14,929 INFO L276 IsEmpty]: Start isEmpty. Operand 2021 states and 2729 transitions. [2020-10-29 13:41:14,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-29 13:41:14,934 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:41:14,935 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] [2020-10-29 13:41:14,935 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 13:41:14,935 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:41:14,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:41:14,936 INFO L82 PathProgramCache]: Analyzing trace with hash 988499025, now seen corresponding path program 1 times [2020-10-29 13:41:14,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:41:14,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1953080163] [2020-10-29 13:41:14,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:41:14,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:41:15,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:15,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:15,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:15,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:15,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:18,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:41:18,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-29 13:41:18,995 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 13:41:18,995 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4012 [2020-10-29 13:41:18,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:41:18,995 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:41:18,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:41:18,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:41:18,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-29 13:41:18,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:41:21,044 WARN L193 SmtUtils]: Spent 1.87 s on a formula simplification that was a NOOP. DAG size: 535 [2020-10-29 13:41:21,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:41:21,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:41:21,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:21,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:41:21,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:41:21,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:41:21,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-29 13:41:21,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:41:21,077 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:41:21,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:41:21,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:41:21,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:41:21,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:41:21,142 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 13:41:21,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1953080163] [2020-10-29 13:41:21,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:41:21,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-29 13:41:21,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304680926] [2020-10-29 13:41:21,143 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:41:21,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:41:21,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:41:21,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:41:21,144 INFO L87 Difference]: Start difference. First operand 2021 states and 2729 transitions. Second operand 9 states. [2020-10-29 13:41:23,166 WARN L193 SmtUtils]: Spent 1.92 s on a formula simplification that was a NOOP. DAG size: 542 [2020-10-29 13:41:32,683 WARN L193 SmtUtils]: Spent 1.99 s on a formula simplification that was a NOOP. DAG size: 544 [2020-10-29 13:41:35,214 WARN L193 SmtUtils]: Spent 1.92 s on a formula simplification that was a NOOP. DAG size: 541 [2020-10-29 13:41:37,351 WARN L193 SmtUtils]: Spent 1.95 s on a formula simplification that was a NOOP. DAG size: 546 [2020-10-29 13:41:38,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:41:38,602 INFO L93 Difference]: Finished difference Result 5974 states and 8484 transitions. [2020-10-29 13:41:38,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 13:41:38,603 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 62 [2020-10-29 13:41:38,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:41:38,627 INFO L225 Difference]: With dead ends: 5974 [2020-10-29 13:41:38,627 INFO L226 Difference]: Without dead ends: 5964 [2020-10-29 13:41:38,629 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2020-10-29 13:41:38,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5964 states. [2020-10-29 13:41:38,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5964 to 2013. [2020-10-29 13:41:38,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2013 states. [2020-10-29 13:41:38,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2013 states to 2013 states and 2720 transitions. [2020-10-29 13:41:38,924 INFO L78 Accepts]: Start accepts. Automaton has 2013 states and 2720 transitions. Word has length 62 [2020-10-29 13:41:38,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:41:38,925 INFO L481 AbstractCegarLoop]: Abstraction has 2013 states and 2720 transitions. [2020-10-29 13:41:38,925 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 13:41:38,925 INFO L276 IsEmpty]: Start isEmpty. Operand 2013 states and 2720 transitions. [2020-10-29 13:41:38,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-29 13:41:38,929 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:41:38,929 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] [2020-10-29 13:41:38,929 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 13:41:38,929 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:41:38,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:41:38,930 INFO L82 PathProgramCache]: Analyzing trace with hash 84604989, now seen corresponding path program 1 times [2020-10-29 13:41:38,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:41:38,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2022953808] [2020-10-29 13:41:38,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:41:38,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:41:38,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:39,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:39,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:39,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:39,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:39,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:39,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:39,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:43,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:41:43,465 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-29 13:41:43,465 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 13:41:43,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4496 [2020-10-29 13:41:43,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:41:43,466 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:41:43,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:41:43,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 13:41:43,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-29 13:41:43,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:41:45,362 WARN L193 SmtUtils]: Spent 1.78 s on a formula simplification that was a NOOP. DAG size: 535 [2020-10-29 13:41:45,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:41:45,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:41:45,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:45,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:41:45,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:41:45,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:41:45,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-29 13:41:45,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:41:45,441 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:41:45,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:41:45,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:41:45,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:41:45,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:41:45,482 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 13:41:45,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2022953808] [2020-10-29 13:41:45,483 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:41:45,483 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:41:45,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704062930] [2020-10-29 13:41:45,484 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:41:45,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:41:45,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:41:45,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:41:45,485 INFO L87 Difference]: Start difference. First operand 2013 states and 2720 transitions. Second operand 6 states. [2020-10-29 13:41:54,271 WARN L193 SmtUtils]: Spent 1.89 s on a formula simplification that was a NOOP. DAG size: 544 [2020-10-29 13:41:56,124 WARN L193 SmtUtils]: Spent 1.83 s on a formula simplification that was a NOOP. DAG size: 541 [2020-10-29 13:41:58,100 WARN L193 SmtUtils]: Spent 1.90 s on a formula simplification that was a NOOP. DAG size: 546 [2020-10-29 13:41:58,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:41:58,411 INFO L93 Difference]: Finished difference Result 3533 states and 4975 transitions. [2020-10-29 13:41:58,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 13:41:58,412 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2020-10-29 13:41:58,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:41:58,419 INFO L225 Difference]: With dead ends: 3533 [2020-10-29 13:41:58,419 INFO L226 Difference]: Without dead ends: 2521 [2020-10-29 13:41:58,422 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:41:58,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2521 states. [2020-10-29 13:41:58,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2521 to 2515. [2020-10-29 13:41:58,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2515 states. [2020-10-29 13:41:58,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2515 states to 2515 states and 3453 transitions. [2020-10-29 13:41:58,709 INFO L78 Accepts]: Start accepts. Automaton has 2515 states and 3453 transitions. Word has length 66 [2020-10-29 13:41:58,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:41:58,710 INFO L481 AbstractCegarLoop]: Abstraction has 2515 states and 3453 transitions. [2020-10-29 13:41:58,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:41:58,710 INFO L276 IsEmpty]: Start isEmpty. Operand 2515 states and 3453 transitions. [2020-10-29 13:41:58,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-29 13:41:58,715 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:41:58,715 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] [2020-10-29 13:41:58,716 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 13:41:58,716 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:41:58,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:41:58,716 INFO L82 PathProgramCache]: Analyzing trace with hash 2135840126, now seen corresponding path program 1 times [2020-10-29 13:41:58,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:41:58,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [20822672] [2020-10-29 13:41:58,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:41:58,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:41:58,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:58,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:58,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:58,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:58,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:59,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:41:59,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:01,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking...